S1720, S2700, S5700, and S6720 V200R011C10 Command Reference

display ospf asbr-summary

advertise mpls-lsr-id

Function

The advertise mpls-lsr-id command configures OSPF to advertise MPLS LSR IDs to multiple areas as intra-area routes.

The undo advertise mpls-lsr-id command cancels the configuration.

By default, OSPF does not advertise MPLS LSR IDs to multiple areas as intra-area routes.

Format

advertise mpls-lsr-id [ cost cost ]

undo advertise mpls-lsr-id

Parameters

Parameter	Description	Value
cost cost	Specifies the cost of the advertised route.	The value is an integer that ranges from 0 to 65535. By default, it is 0.

Views

OSPF view

Usage Guidelines

Usage Scenario

The prerequisite of a valid tunnel is that an intra-area route to the egress is reachable. When an ABR serves as the egress of tunnels in two areas, OSPF considers that only one tunnel is valid, because there is only one intra-area route to the egress, namely the IP address of the ABR's loopback interface (used as an MPLS LSR ID for tunnel establishment). To the other areas, this route is an inter-area route. To allow the tunnels in both areas to take effect, run the advertise mpls-lsr-id command to configure OSPF to advertise the intra-area route to the MPLS LSR ID to all areas connected to this device.

Prerequisites

Before running this command, the mpls te command has been run to enable MPLS TE globally.

Configuration Impact

Running this command may have the following impacts:

If the OSPF area where the local switch resides does not have the interface whose IP address is the MPLS LSR ID, the type of the OSPF routes (with the destination address being the MPLS LSR ID) on the other devices in this OSPF area will be changed from inter-area to intra-area, and the cost will also be changed.
If an OSPF NSSA has the interface whose IP address is the MPLS LSR ID and the forwarding address of the NSSA LSAs advertised in this area is the MPLS LSR ID, the forwarding address of these NSSA LSAs will be changed and the NSSA LSAs will be re-advertised, thus causing route calculation.

Example

# Configure OSPF to advertise MPLS LSR IDs to multiple areas as intra-area routes.

<HUAWEI> system-view
[HUAWEI] ospf
[HUAWEI-ospf-1] advertise mpls-lsr-id

area (OSPF)

Function

The area command creates an OSPF area and displays the OSPF area view.

The undo area command deletes a specified area.

By default, the system does not creates any OSPF area.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

area area-id

undo area area-id

Parameters

Parameter	Description	Value
area-id	Specifies an area ID. The area with the area-id of 0 is the backbone area.	The value can be a decimal integer or in dotted decimal notation. When the value is an integer, the value ranges from 0 to 4294967295.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The number of devices increases with the expansion of a network. This leads to a large LSDB on every OSPF-enabled device on a large-scale network. Route flapping frequently occurs and as such, a large number of OSPF packets are transmitted on the network. This wastes bandwidth resources.

OSPF resolves this problem by partitioning an AS into different areas. An area is regarded as a logical group, and each group is identified by a unique area ID.

Configuration Impact

After OSPF partitions the AS into different areas, the functions of multiple devices in the same area, such as the timer, filter, and summarization, can be planned and configured uniformly in the area. Therefore, the size of the LSDB is reduced, and network performance is improved.

Prerequisites

An OSPF process has been started using the ospf command.

Precautions

At the border of an area resides a switch instead of a link.
A network segment or a link belongs to only one area. Specify the area to which each OSPF interface belongs.
The backbone area is responsible for forwarding inter-area routing information. The routing information between the non-backbone areas must be forwarded through the backbone area.
All non-backbone areas must maintain connectivity with the backbone area. The backbone area must also maintain connectivity within itself.

Example

# Enter the view of an OSPF area.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 0

[HUAWEI-ospf-100-area-0.0.0.0]

Related Topics

network (OSPF area)

asbr-summary

Function

The asbr-summary command configures an AS Boundary Router (ASBR) to summarize the routes imported by OSPF.

The undo asbr-summary command disables an ASBR from summarizing the routes imported by OSPF.

By default, ASBRs do not summarize the routes imported by OSPF.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

asbr-summary ip-address mask [ [ not-advertise | generate-null0-route ] | tag tag | cost cost | distribute-delay interval ] ^*

asbr-summary type nssa-trans-type-reference [ cost nssa-trans-cost-reference ]

undo asbr-summary type

undo asbr-summary ip-address mask

Parameters

Parameter	Description	Value
ip-address	Specifies the IP address of a summarized route.	The value is in dotted decimal notation.
mask	Specifies the mask of the IP address of the summarized route.	The value is in dotted decimal notation.
not-advertise	Indicates that the summarized route is not advertised. If this parameter is not specified, the summarized route is advertised.	-
generate-null0-route	Generates a blackhole route to prevent routing loops.	-
tag tag	Specifies the tag of the summarized route.	The value is an integer that ranges from 0 to 4294967295. The default value is 1.
cost cost	Specifies the cost of the summarized route. By default, for Type 1 external routes, the cost of the summarized route is the highest cost of specific routes; for Type 2 external routes, the cost of the summarized route equals the highest cost of specific routes plus 1.	The value is an integer that ranges from 0 to 16777214.
distribute-delay interval	Specifies the delay in advertising the summarized route.	The value is an integer that ranges from 1 to 65535, in seconds.
type nssa-trans-type-reference	Enables OSPF to consider Type 5 LSAs that have been translated from Type 7 LSAs when it sets types for summary routes on ASBRs. By default, when OSPF sets types for summary routes on ASBRs, OSPF does not consider Type 5 LSAs that have been translated from Type 7 LSAs.	-
cost nssa-trans-cost-reference	Enables OSPF to consider Type 5 LSAs that have been translated from Type 7 LSAs when it sets costs for summary routes on ASBRs. If the asbr-summary type nssa-trans-type-reference cost nssa-trans-cost-reference command is not run, OSPF does not consider Type 5 LSAs that have been translated from Type 7 LSAs when setting types and costs for summary routes on ASBRs.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a large-scale OSPF network, route search speed may decrease due to a large routing table size. Configure route summarization to reduce the routing table size and simplify management.

Route summarization aggregates multiple routes with the same IP prefix into one. If a link connected to a device within a summarized IP address range alternates between Up and Down states, the link status change is not advertised to the devices outside the IP address range. This prevents route flapping and improves network stability.

Imported routes with the same prefix can be summarized into one and advertised as one route using the asbr-summary command. Route summarization reduces routing information and routing table size, improving device performance.

After route summarization is implemented, if the local device:

If a local router is an ASBR in an NSSA, the local router summarizes all imported Type 5 LSAs within the summary address range.
If the local router is an ASBR in an NSSA, the local router summarizes all imported Type 7 LSAs within the summary address range.
If the local router functions as both an ASBR and an ABR in an NSSA, the local router summarizes all importedType 7 LSAs within the address range. It also summarizes the Type 5 LSAs that are translated from Type 7 LSAs.

Precautions

When a large number of routes are summarized, specify the distribute-delay parameter to set a delay in advertising the summarized routes. This ensures that the advertised summarized routes contain more valid routes and avoids network flapping and incorrect routing information.

Example

# Configure route summarization for the imported routes.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] asbr-summary 10.2.0.0 255.255.0.0 not-advertise tag 2 cost 100

# Cancel route summarization for the imported routes.

[HUAWEI-ospf-100] undo asbr-summary 10.2.0.0 255.255.0.0

Related Topics

authentication-mode (OSPF area)

Function

The authentication-mode command sets an authentication mode and a password for an OSPF area.

The undo authentication-mode command cancels the authentication mode configured for an OSPF area.

By default, no authentication mode is configured.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

authentication-mode simple [ plain plain-text | [ cipher ] cipher-text ]

authentication-mode { md5 | hmac-md5 | hmac-sha256 } [ key-id { plain plain-text | [ cipher ] cipher-text } ]

authentication-mode keychain keychain-name

undo authentication-mode

Only the S6720EI, S6720S-EI, S5720HI, and S5720EI support the keychain keychain-name parameter.

Parameters

Parameter	Description	Value
simple	Sets simple authentication. In simple authentication, the password type is cipher by default. NOTICE: Simple authentication carries potential security risks. As such, HMAC-SHA256 authentication is recommended.	-
plain	Sets a plain text password. If this parameter is specified, you can only enter a plain text password, which then is then displayed in plain text when the configuration file is viewed. NOTICE: If plain is specified, the password is saved in the configuration file in plain text. This carries security risks. It is recommended to specify cipher to save the password in cipher text.	-
plain-text	Sets a plain text password.	The value is a string of case-sensitive characters that can be letters or digits without spaces. In simple authentication, the value is a string of 1 to 8 characters. In md5, hmac-md5 or hmac-sha256 authentication, the value is a string of 1 to 255 characters.
cipher	Sets a cipher text password. Either a plain or cipher text password can be entered, and cipher text is displayed when the configuration file is viewed.	When cipher is configured, the password can only be entered in cipher text. Then, the password is displayed in cipher text in configuration files. MD5 authentication, HMAC-SHA256 authentication or HMAC-MD5 authentication defaults to use the password in cipher text.
cipher-text	Specifies the cipher text password.	The value is a string of case-sensitive characters that can be letters or digits without spaces. In simple authentication, the value is a string of 1 to 8 characters in plain text, or a string of 24 or 32 or 48 characters in cipher text. In md5, hmac-sha256 or hmac-md5 authentication, the value is a string of 1 to 255 characters in plain text, or a string of 20 to 392 characters in cipher text.
md5	Indicates MD5 authentication using the cipher text password. NOTICE: MD5 authentication poses potential security risks, and HMAC-SHA256 authentication is recommended.	-
hmac-md5	Indicates HMAC MD5 authentication using the cipher text password. NOTICE: HMAC-MD5 authentication poses potential security risks, and HMAC-SHA256 authentication is recommended.	-
hmac-sha256	Indicates HMAC-SHA256 authentication.	-
key-id	Specifies authentication key ID of the interface's cipher authentication. The key ID must be consistent with that of the peer.	The value is an integer that ranges from 1 to 255.
keychain	Indicates keychain authentication. NOTE: Before configuring this parameter, run the keychain command to create a keychain. Then, run the key-id, key-string, and algorithm commands to configure a key ID, a password, and an authentication algorithm for this keychain. Otherwise, OSPF authentication will fail. Currently, only the HMAC-MD5 and HMAC-SHA256 algorithms can be used in OSPF.	-
keychain-name	Specifies the keychain name.	The value is a string of 1 to 47 case-insensitive characters. Except the question mark (?) and space. However, when double quotation marks (") are used around the string, spaces are allowed in the string.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF authentication can be configured to improve network security. When area authentication is used, interfaces on all devices in an area must have the same area authentication mode and the password.

Precautions

The priority of area authentication is lower than the priority of interface authentication. The ospf authentication-mode command can be used to change the priority of interface authentication.

Example

# Configure HMAC-SHA256 authentication for OSPF area 0.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 0

[HUAWEI-ospf-100-area-0.0.0.0] authentication-mode hmac-sha256

Related Topics

ospf authentication-mode

bandwidth-reference (OSPF)

Function

The bandwidth-reference command sets a bandwidth reference value that is used to calculate interface costs.

The undo bandwidth-reference command restores the default bandwidth reference value.

The default bandwidth reference value is 100 Mbit/s.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

bandwidth-reference value

undo bandwidth-reference

Parameters

Parameter	Description	Value
value	Specifies a bandwidth reference value for link cost calculation.	The value is an integer ranging from 1 to 2147483648, in Mbit/s. The default value is 100 Mbit/s.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The calculation formula is as follows: Interface cost = Bandwidth reference value/Interface bandwidth. The integer of the calculated result is the interface cost. If the calculated result is smaller than 1, the interface cost value is 1. If the bandwidth-reference command is executed to configure a new bandwidth reference value, the interface cost will be changed. As a result, OSPF will re-select routes.

The default bandwidth reference value is 100 Mbit/s. The interface cost value is 100000000 divided by the interface bandwidth value.

Precautions

After the bandwidth-reference command is configured in a process view, bandwidth reference values of all interfaces in the process are changed to the specified value.

Generally, OSPF automatically calculates the link cost for an interface based on the bandwidth of the interface. You can modify the interface cost using the ospf cost command.

The bandwidth bandwidth command can only set an interface bandwidth obtained by the NMS from the MIB. It cannot change an interface actual bandwidth and interface cost.

If the bandwidth-reference command is run on an Eth-Trunk interface, the bandwidth of the Eth-Trunk interface is equal to the total bandwidth of all its member interfaces.

Example

# Set the bandwidth reference value to 1000 Mbit/s.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] bandwidth-reference 1000

bfd all-interfaces (OSPF)

Function

The bfd all-interfaces command enables bidirectional forwarding detection (BFD) in an OSPF process and sets the parameter values of a BFD session.

The undo bfd all-interfaces command disables BFD in an OSPF process and restores the default parameter values of a BFD session.

By default, BFD is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

bfd all-interfaces enable

undo bfd all-interfaces enable

bfd all-interfaces { min-rx-interval receive-interval | min-tx-interval transmit-interval | detect-multiplier multiplier-value | frr-binding } ^*

undo bfd all-interfaces { min-rx-interval | min-tx-interval | detect-multiplier| frr-binding } ^*

Only the S6720EI, S6720S-EI, S5720HI, and S5720EI support the frr-binding parameter.

Parameters

Parameter	Description	Value
min-rx-interval receive-interval	Indicates the minimum interval at which BFD packets are received from the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720HI, the value ranges from 3 to 1000.By default, the minimum interval for receiving BFD packets is 1000 ms.
min-tx-interval transmit-interval	Indicates the minimum interval at which BFD packets are sent to the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720HI, the value ranges from 3 to 1000.By default, the minimum interval for receiving BFD packets is 1000 ms.
detect-multiplier multiplier-value	Indicates the local detection multiplier.	The value is an integer ranging from 3 to 50. By default, it is 3.
frr-binding	Binds the BFD status to the link status of an interface.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a device communicates with its neighbors, BFD can fast detect faults to minimize the fault impact on services.

You can bind a BFD session to an interface or an OSPF process. If a BFD session is bound to both an interface and an OSPF process, the BFD session bound to an interface takes precedence over that bound to an OSPF process.

Precautions

receive-interval is negotiated between local min-rx-interval and remote min-tx-interval. The smaller of local min-rx-interval and remote min-tx-interval is used as the remote min-tx-interval. If the local end does not receive any BFD packets within the interval of receive-interval × multiplier-value (local detection multiplier), it declares that the remote end is unreachable.
An OSPF device sets up BFD sessions with only the neighbors in Exstart state. Two ends can set up a BFD session only when the bfd command is run on both ends to configure BFD globally and the bfd all-interfaces enable command is run.
The bfd all-interfaces command and the ospf bfd block command are mutually exclusive.

Example

# Configure BFD in an OSPF process and set the minimum interval for sending BFD packets to 400 ms.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] bfd all-interfaces enable

[HUAWEI-ospf-1] bfd all-interfaces min-tx-interval 400

Related Topics

ospf bfd

ospf bfd block

default (OSPF)

Function

The default command configures default parameters for OSPF-imported external routes. The parameters include the cost, type (Type 1 or Type 2), tag, and number of imported routes.

The undo default command restores the default setting.

By default, the default cost of the imported external routes is 1; the upper limit of the imported external routes is 2147483647; the type of the imported external routes is Type 2; the default tag value is 1.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

default { cost { cost-value | inherit-metric } | limit limit | tag tag | type type } ^*

undo default { cost | limit | tag | type } ^*

Parameters

Parameter	Description	Value
cost cost-value	Specifies the default cost of the external routes imported by OSPF.	The value is an integer ranging from 0 to 16777214. By default, it is 1.
inherit-metric	Indicates that the cost of the imported route is the cost that the route itself carries. If no cost is specified, the default cost set using the default command is used.	-
limit limit	Specifies the default upper limit of the external routes to be imported within a given period.	The value is an integer ranging from 1 to 2147483647.
tag tag	Specifies the tag of the external routes.	The value is an integer ranging from 0 to 4294967295. By default, it is 1.
type type	Specifies the type of the external routes.	The value is an integer ranging from 1 to 2. By default, it is 2. 1: Type 1 external route 2: Type 2 external route

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The imported external routes carry various parameters that can change the priorities and next hops of those routes in the OSPF routing table.

By setting default parameters for OSPF-imported external routes, you can change OSPF routing policies.

The route tag is used to identify protocol-related information. For example, it can be used to differentiate AS numbers when OSPF receives BGP routes. It also allows you to apply OSPF routing policies to tagged routes.

Follow-up Procedure

The priority of the default (OSPF) command is the lowest. Thus, ensure that no other commands are configured when configuring this command. Otherwise, this command cannot take effect.

Precautions

You can run any of the following commands to set a cost for an imported route. The following commands are listed in the descending order of priority.

apply cost
import-route (OSPF)
default (OSPF)

Example

# Set the default values for the cost, type, and tag of imported routes.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] default cost 10 tag 100 type 2

Related Topics

apply cost

default-cost (OSPF Area)

Function

The default-cost command sets a cost for the Type3 default route that is transmitted to a stub or NSSA by OSPF.

The undo default-cost command restores the default setting.

By default, the cost of the Type3 default route transmitted to a stub or NSSA is 1.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

default-cost cost

undo default-cost

Parameters

Parameter	Description	Value
cost	Specifies the cost of the Type3 default route transmitted to a stub or NSSA by OSPF.	The value is an integer ranging from 0 to 16777214.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Configuring a cost for a default route can change OSPF route selection, improving networking flexibility.

This command is applicable to area border routers (ABRs) connected to stubs or NSSAs.

Prerequisites

A default route exists in the local routing table.

Example

# Set Area 1 as a stub area, and set the cost of the Type 3 default route transmitted to this stub area to 20.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 1

[HUAWEI-ospf-100-area-0.0.0.1] stub

[HUAWEI-ospf-100-area-0.0.0.1] default-cost 20

Related Topics

stub (OSPF area)

default-route-advertise (OSPF)

Function

The default-route-advertise command advertises default routes to a common OSPF area.

The undo default-route-advertise command disables advertisement of default routes to a common OSPF area.

By default, OSPF devices in a common OSPF area do not generate default routes.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

default-route-advertise [ [ always | permit-calculate-other ] | cost cost | type type | route-policy route-policy-name [ match-any ] ] ^*

default-route-advertise summary cost cost

undo default-route-advertise

Parameters

Parameter	Description	Value
always	Generates and advertises an LSA that describes the default route, regardless of whether there are active default routes of other OSPF processes in the routing table of the host. If always is configured, the switch does not calculate the default routes from other switches. If always is not configured, an LSA for advertising a default route can be generated only when there are active default routes of other OSPF processes in the routing table of the local device.	-
permit-calculate-other	Generates and advertises an ASE LSA that describes the default route only when there are active default routes of other OSPF processes in the routing table of the local device. The device still calculates the default routes from other devices. NOTE: If neither always nor permit-calculate-other is configured, When there are active default routes of other OSPF processes in the routing table of the local device, the device does not calculate the default routes from other devices. When there are no active default routes of other OSPF processes in the routing table of the local device, the device still calculates the default routes from other devices.	-
cost cost	Specifies the cost of the ASE LSA.	The value is an integer that ranges from 0 to 16777214. The default value is 1.
type type	Specifies the type of the external routes.	The value is 1 or 2. The default value is 2. 1: Type 1 external route 2: Type 2 external route
route-policy route-policy-name	Specifies the name of a routing policy. The device advertises default routes according to the parameters of the configured routing policy when there are matched default routes of other OSPF processes in the routing table of the device.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
summary	Advertises the Type 3 summary LSA of the specified default route. Before specifying this parameter, ensure that a VPN is enabled. Otherwise, routes cannot be advertised.	-
match-any	Indicates that a device matches the routing entry in the routing table against a routing policy and then advertises the default route according to the parameters set through the routing policy.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The import-route (OSPF) command cannot be used to import a default route from another AS. Running the default-route-advertise command on an ASBR can advertise a non-OSPF default route in a common OSPF area.

If the ASBR has a default route, the default-route-advertise command enables the ASBR to advertise the default route 0.0.0.0 to the OSPF area.

If the ASBR has no default route, the default-route-advertise always command or the default-route-advertise command can be used:

With always configured: The ASBR can advertise the default route 0.0.0.0 even if there is no default route. This allows the default route to remain in the routing table and prevents the ASBR from using a default route sent by another device.
Without always configured: The ASBR generates an LSA. It describes a default route only when the local routing table contains an activated non-OSPF default route (except BGP route).

If the local routing table contains an activated default BGP route, the default route can be injected to the OSPF routing table based on the following situations:
- Whether the ospf process-id vpn-instance vpn-instance-name command is run together with the vpn-instance-capability simple command:
  - If the two commands are executed together, to inject an activated default EBGP route into the OSPF routing table, run the default-route-advertise command. To inject an activated default IBGP route to the OSPF routing table, run the import-route bgp permit-ibgp command before you run the default-route-advertise command.
  - If only the ospf process-id vpn-instance vpn-instance-name command is run, to inject an activated default EBGP or IBGP route into the OSPF routing table, run the default-route-advertise command.
- If the ospf process-id vpn-instance vpn-instance-name command is not run, to inject an activated default EBGP route into the OSPF routing table, run the default-route-advertise command. To inject an activated default IBGP route to the OSPF routing table, run the import-route bgp permit-ibgp command before you run the default-route-advertise command.

Injecting an IBGP route into the OSPF routing table may cause a routing loop. Exercise caution when you perform this step.

If a routing policy is configured with match-any, and multiple routes match the policy, a default LSA will be generated based on the optimal route. The principles for optimal route selection are as follows:

A route configured with type takes precedence over that not configured with type. A route configured with a smaller type value takes precedence over that configured with a larger type value.
A route configured with cost takes precedence over that not configured with cost. A route configured with a smaller cost value takes precedence over that configured with a larger cost value.
A route configured with tag takes precedence over that not configured with tag. A route configured with a smaller tag value takes precedence over that configured with a larger tag value.

Prerequisites

Before advertising a default route, OSPF compares the priorities of default routes in an OSPF area and then advertises a default route with the highest priority. If a static default route is configured on an OSPF device, check the priority of the static default route. The priority must be lower than that of the default route to be advertised by OSPF. This ensures that the default route advertised by OSPF will be added to the routing table of the OSPF device.

Configuration Impact

After the default-route-advertise command is configured on the ASBR, the ASBR will generate a Type 5 ASE LSA with a link state ID of 0.0.0.0 and mask of 0.0.0.0. In addition, it will advertise the ASE LSA in an entire OSPF area.

If a routing policy is configured, default routes are advertised based on the following principles:

If a default route matches the routing policy, a default route is generated on an OSPF device based on the parameters configured in the routing policy. Parameters such as cost, tag, and type can be configured in the routing policy.
If the default route does not match the routing policy, and always is configured, the default route is still advertised.
- If always is not configured, the OSPF device will not advertise the default route.
- If always is configured, OSPF devices will advertise the default route. In addition, only always configured in the default-route-advertise command takes effect on advertisement of default routes.

Precautions

In different OSPF areas, OSPF advertises default routes using different modes. This default-route-advertise command can be used to advertise default routes to a common OSPF area. In a stub, totally stub, or totally NSSA area, default routes are advertised automatically. In an NSSA, the nssa default-route-advertise command is used to advertise default routes.

Creating a route-policy before it is referenced is recommended. By default, nonexistent route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent route-policy is referenced using the current command, the device advertises the default route as long as a default route that is not generated by the current OSPF process exists in the local routing table.

Example

# Configure an ASBR to advertise the ASE LSA of the default route to common OSPF areas when it has no default route.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] default-route-advertise always

Related Topics

nssa (OSPF Area)

description (OSPF)

Function

The description command configures a description for an OSPF process.

The undo description command deletes the description.

By default, there is no description for any OSPF process.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

description text

undo description

Parameters

Parameter	Description	Value
text	Specifies the description of an OSPF process.	The value is a string of 1 to 80 case-sensitive characters, spaces supported.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

An OSPF process description helps identify special processes, facilitating network maintenance.

Configuration Impact

If the description command is run multiple times, the latest configuration overrides the previous one.

Example

# Configure a description for an OSPF process.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] description this process contains 3 areas

description (OSPF Area)

Function

The description command configures a description for an OSPF area.

The undo description command deletes the description.

By default, there is no description for any OSPF area.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

description text

undo description

Parameters

Parameter	Description	Value
text	Specifies the description of an OSPF area.	The value is a string of 1 to 80 case-sensitive characters, spaces supported.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

An OSPF area description helps identify special areas, facilitating network maintenance.

Example

# Configure a description for OSPF area 1.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 1

[HUAWEI-ospf-100-area-0.0.0.1] description this is a stub area

Related Topics

description (OSPF)

display default-parameter ospf

Function

The display default-parameter ospf command displays the default OSPF configuration.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display default-parameter ospf

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display default-parameter ospf command to check the default OSPF configuration during OSPF initialization. After the OSPF configuration is modified, this command still displays the default OSPF configuration during OSPF initialization.

Example

# Display the default OSPF configuration.

<HUAWEI> display default-parameter ospf
 Process View:
 -------------------------------------------------------
   Default Metric                               : 1
   Default Tag                                  : 1
   Default Type                                 : 2
   SPF Intelligent-timer Max-interval(msec)     : 10000
   SPF Intelligent-timer Start-interval(msec)   : 500
   SPF Intelligent-timer Hold-interval(msec)    : 1000
   Lsa Maxage (sec)                             : 3600
   Lsa Refresh Time(sec)                        : 1800
   Lsa Maxagediff Interval (sec)                : 900
   Minimum Lsa Arrival Interval(sec)            : 1
   Minimum Lsa Originate Interval(sec)          : 5
   Sham Link Cost                               : 1
   VPN Domain ID                                : 0
   VPN Router Tag                               : 0
   Route Preference for Internal Routes         : 10
   Route Preference for External Routes         : 150
 -------------------------------------------------------

 Area View:
 -------------------------------------------------------
   Default Stub Cost                            : 1
 -------------------------------------------------------

 Interface View:
 -------------------------------------------------------
   P2P&Broadcast Hello Interval(sec)            : 10
   P2MP&NBMA Hello Interval(sec)                : 30
   P2P&Broadcast Dead Interval(sec)             : 40
   P2MP&NBMA Dead Interval(sec)                 : 120
   Poll Interval(sec)                           : 120
   Router DR Priority                           : 1
   Retransmit Interval(sec)                     : 5
   Transmit Delay(sec)                          : 1
 -------------------------------------------------------

Table 7-24 Description of the display default-parameter ospf command output

Item	Description
Process View	Process view.
Default Metric	Default metric of the imported external route.
Default Tag	Default tag value of the imported external route.
Default Type	Default type of the imported external route.
SPF Intelligent-timer Max-interval(msec)	Default maximum interval of SPF calculation.
SPF Intelligent-timer Start-interval(msec)	Default start interval of SPF calculation.
SPF Intelligent-timer Hold-interval(msec)	Default hold interval of SPF calculation.
Lsa Maxage(sec)	Default maximum age of the LSA.
Lsa Refresh Time(sec)	Default maximum interval for generating an LSA. If the LS age of the LSAs generated by the device reaches the LSA Refresh Time, a new instance must be generated for the LSAs.
Lsa Maxagediff Interval(sec)	Default value difference in the MaxAge fields of LSAs. If the value difference in the MaxAge fields of two LSAs is greater than MaxAgeDiff Interval, the two LSAs are considered to belong to different instances of the same LSA.
Minimum Lsa Arrival Interval(sec)	Default minimum interval for receiving the same LSA.
Minimum Lsa Originate Interval(sec)	Default minimum interval for sending the same LSA.
Sham Link Cost	Default cost of the sham link.
VPN Domain ID	Default domain ID of the VPN.
VPN Router Tag	Default router tag of the VPN.
Route Preference for Internal Routes	Default preference of the internal route.
Route Preference for External Routes	Default preference of the external route.
Area View	Area view.
Default Stub Cost	Default cost of a route in the stub area.
Interface View	Interface view.
P2P&Broadcast Hello Interval(sec)	Default interval for sending Hello packets on a P2P or broadcast network.
P2MP&NBMA Hello Interval(sec)	Default interval for sending Hello packets on a P2MP or NBMA network.
P2P&Broadcast Dead Interval(sec)	Default interval for declaring a neighbor to be Down after no Hello packets are received on a P2P or broadcast network.
P2MP&NBMA Dead Interval(sec)	Default interval for declaring a neighbor to be Down after no Hello packets are received on a P2MP or NBMA network.
Poll Interval(sec)	Default interval for the local device to send Hello packets to a neighbor in the Down state on the NBMA network. The value of Poll Interval is greater than the value of Hello Interval.
Router DR Priority	Default priority of the DR.
Retransmit Interval(sec)	Default interval for retransmitting packets.
Transmit Delay(sec)	Default estimated time for transmitting an LSU packet over this interface. LSAs in the LSU packet must have their age incremented by this amount before transmission.

display gtsm statistics

Function

The display gtsm statistics command displays GTSM statistics on a device.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display gtsm statistics all

Parameters

Parameter	Description	Value
all	Displays GTSM statistics on a device.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display gtsm statistics command to view GTSM statistics, including the total number of BGP, BGPv6, OSPF, LDP, OSPFv3, or RIP packets, the number of packets that have passed, and the number of discarded packets on a device.

Example

# Display GTSM statistics on the device.

<HUAWEI> display gtsm statistics all

GTSM Statistics Table                                                           
----------------------------------------------------------------                
SlotId  Protocol  Total Counters  Drop Counters  Pass Counters                  
----------------------------------------------------------------                
 0      BGP       0               0              0                              
 0      BGPv6     0               0              0                              
 0      OSPF      0               0              0                              
 0      LDP       0               0              0                              
 0      OSPFv3    0               0              0                              
 0      RIP       0               0              0       
----------------------------------------------------------------

Table 7-25 Description of the display gtsm statistics command output

Item	Description
SlotId	Slot ID.
Protocol	Protocol type: Software-based forwarding: protocol differentiated, displaying BGP, BGPv6, OSPF, LDP, OSPFv3, or RIP Hardware-based forwarding: protocol undifferentiated, displaying -----
Total Counters	Total number of packets.
Drop Counters	Total number of dropped packets.
Pass Counters	Total number of packets that have passed.

Related Topics

reset gtsm statistics

display ospf abr-asbr

Function

The display ospf abr-asbr command displays information about the ABRs and ASBRs of OSPF.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] abr-asbr [ router-id ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
router-id	Specifies the router ID of an ABR or ASBR.	The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

An area border router (ABR) can belong to two or more areas. One of the areas must be a backbone area. An ABR is used to connect the backbone area and non-backbone areas. The connection with the backbone area can be physically or logically.

An AS boundary router (ASBR) exchanges routing information with other ASs. An ASBR may not reside at the boundary of an AS. It can be an internal device or an ABR. If an OSPF device imports external routes, the device is an ASBR.

This command can view information about the ABRs and ASBRs of OSPF.

Example

# Display information about the ABRs and ASBRs of OSPF.

<HUAWEI> display ospf abr-asbr

                                                                                
         OSPF Process 1 with Router ID 1.1.1.1                             
                 Routing Table to ABR and ASBR                                  
                                                                                
 RtType      Destination       Area       Cost  Nexthop         Type            
 Intra-area  10.10.10.11       0.0.0.0    1     10.2.0.3        ABR

Table 7-26 Description of the display ospf abr-asbr command output

Item	Description
RtType	Intra-area or inter-area router.
Destination	Router ID of the ABR or ASBR.
Area	Area ID.
Cost	Cost of the route from the local device to the ABR or ASBR.
NextHop	Next hop address through which packets are transmitted to the ABR or ASBR.
Type	ABR or ASBR.

display ospf asbr-summary

Function

The display ospf asbr-summary command displays information about OSPF route summarization.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] asbr-summary [ ip-address mask ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
ip-address	Specifies the summary IP address.	The value is in dotted decimal notation.
mask	Specifies the mask of the summary IP address. If no IP address or mask is specified, summarization information of all the imported routes is displayed.	The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

After an AS is divided into areas, configuring route aggregation can reduce routing information transmitted between areas. This reduces the size of the routing table and improves route performance.

To check information about OSPF route summarization, run the asbr-summary command.

Example

# Display summarization information about all the imported OSPF routes.

<HUAWEI> display ospf asbr-summary

          OSPF Process 1 with Router ID 192.168.1.2

                  Summary Addresses

 Total summary address count: 1

                  Summary Address

 net         : 10.0.0.0

 mask        : 255.0.0.0

 tag         : 10

 status      : Advertise

 Cost        : 0 (Not Configured)

 delay       : 30 (Configured)

 The Count of Route is : 2

 Destination     Net Mask        Proto      Process   Type     Metric

 10.1.0.0        255.255.0.0     Static     1         2        10

 10.2.0.0        255.255.0.0     Static     1         2        10

Table 7-27 Description of the display ospf asbr-summary command output

Item	Description
Total summary address count	Number of routes that are being summarized through the asbr-summary command.
net	Network address of the summary route.
mask	Network mask of the summary route.
tag	Tag of the summary route.
status	Advertisement status of the summary route: Advertise: indicates that the summary route is advertised. DoNotAdvertise: indicates that the summary route is not advertised.
Cost	Cost of the summarized route.
delay	Delay for advertising the summary route.
The Count of Route is	Number of routes that are being summarized.
Destination	Destination address of the routes that are being summarized.
Net Mask	Mask of the routes that are being summarized.
Proto	Protocol of the routes that are being summarized.
Process	Process ID.
Type	Type of the imported AS external route, which can be Type 1 or Type 2.
Metric	Metric of the routes that are being summarized.

Related Topics

asbr-summary

display ospf bfd session

Function

The display ospf bfd session command displays information about the BFD-enabled neighbor.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

display ospf [ process-id ] bfd session interface-type interface-number [ router-id ]

display ospf [ process-id ] bfd session { router-id | all }

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies the type and number of an interface.	-
router-id	Specifies the router ID of the neighbor.	The value is in dotted decimal notation.
all	Indicates all the OSPF-enabled interfaces in the OSPF process.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

A BFD session can be associated with OSPF to fast detect a link fault and notifies OSPF of the fault. This speeds up OSPF's response to the change of the network topology.

The display ospf bfd session command displays information about the BFD-enabled neighbor.

Example

# Display information about the BFD-enabled neighbor.

<HUAWEI> display ospf bfd session all

          OSPF Process 1 with Router ID 10.3.3.3
  Area 0.0.0.0 interface 100.1.1.1(Vlanif100)'s BFD Sessions
 NeighborId:10.2.2.2         AreaId:0.0.0.0          Interface:Vlanif100
 BFDState:up                 rx    :1000             tx       :1000
 Multiplier:3                BFD Local Dis:8198      LocalIpAdd:10.1.1.1
 RemoteIpAdd:10.1.1.2        Diagnostic Info:No diagnostic information

Table 7-28 Description of the display ospf bfd session all command output

Item	Description
NeighborId	Router ID of the neighbor.
AreaId	Area ID.
Interface	Interface through which the local device establishes a BFD session with the neighbor.
BFDState	BFD status: up down unknown
rx	Negotiated minimum interval for receiving BFD packets.
tx	Negotiated minimum interval for sending BFD packets.
Multiplier	Remote detection multiplier.
BFD Local Dis	Local discriminator dynamically assigned by BFD.
LocalIpAdd	Local IP address.
RemoteIpAdd	Remote IP address.
Diagnostic Info	Diagnostic information: Init: indicates that the BFD session is in the Initiate state. Admin down: indicates that the shutdown command is run on the local BFD session. BFD global disable: indicates that BFD is not enabled globally. BFD session number exceed: indicates that the number of BFD sessions exceeds the limit. Detect down: indicates that the local link becomes Down. Receive admin down: indicates that the remote link becomes Down. BFD is in rearranging: indicates that the board of the BFD session changes, and the data of the BFD session is transferred to another board. No diagnostic information: indicates that no diagnostic information exists. No BFD packets were received: indicates that detection expires because no BFD packets are received within a specified period. administrator down event received: indicates that the device receives an event that the BFD session is set Down by the network administrator.

display ospf brief

Function

The display ospf brief command displays OSPF brief information.

Format

display ospf [ process-id ] brief

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, brief information about all the OSPF processes is displayed.	The value is an integer ranging from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

In addition to OSPF brief information, running this command also displays the following information:

Configured Router ID
Configured VPN domain ID

When locating OSPF faults, you can run the display ospf brief command to obtain OSPF brief information. You can then analyze OSPF faults according to the brief information.

Example

# Display OSPF brief information.

<HUAWEI> display ospf brief

          OSPF Process 1 with Router ID 10.5.5.5
                  OSPF Protocol Information

 RouterID: 10.5.5.5         Border Router:  AREA
 Multi-VPN-Instance is not enabled
 Opaque Capable
 Global DS-TE Mode: Non-Standard IETF Mode
 Graceful-restart capability: disabled
 Helper support capability  : not configured
        filter capability   : disabled        
        policy capability   : strict lsa check, planned and un-planned
 Applications Supported: MPLS Traffic-Engineering
Spf-schedule-interval: max 10000ms, start 500ms, hold 1000ms
 Default ASE parameters: Metric: 1 Tag: 1 Type: 2
 Route Preference: 10
 ASE Route Preference: 150
 SPF Computation Count: 99
 RFC 1583 Compatible
 Retransmission limitation is disabled
 Import routes limitation is enabled, the maximal limitation value: 4294967295
 Area Count: 3   Nssa Area Count: 0
 ExChange/Loading Neighbors: 0
 Process total up interface count: 1
 Process valid up interface count: 0
 Flush protect mode: false

 Area: 0.0.0.0          (MPLS TE not enabled)
 Authtype: None   Area flag: Normal
 SPF scheduled Count: 94
 ExChange/Loading Neighbors: 0
 Router ID conflict state: Normal
 Area interface up count: 1 

 Interface: 172.16.16.5 (Vlanif1001)
 Cost: 1       State: BDR       Type: Broadcast    MTU: 1500
 Priority: 1
 Designated Router: 172.16.16.2
 Backup Designated Router: 172.16.16.5
 Timers: Hello 10 , Dead 40 , Poll  120 , Retransmit 5 , Transmit Delay 1

 Area: 0.0.0.1
 Authtype: Simple   Area flag: Normal
 SPF scheduled Count: 83
 ExChange/Loading Neighbors: 0
 Router ID conflict state: Normal
 Area interface up count: 0 

 Area: 0.0.0.2
 Authtype: None   Area flag: Normal
 SPF scheduled Count: 81
 ExChange/Loading Neighbors: 0
 Router ID conflict state: Normal
 Area interface up count: 0 

 Interface: 10.100.100.100 (LoopBack100)
 Cost: 0       State: P-2-P     Type: P2P       MTU: 1500
 Timers: Hello 10 , Dead 40 , Poll  120 , Retransmit 5 , Transmit Delay 1

Table 7-29 Description of the display ospf brief command output

Item	Description
RouterID	Current router ID.
Border Router	Border router: AS: autonomous system border router (ASBR). AREA: area border router (ABR). NSSA: ABR of an NSSA.
Multi-VPN-Instance is not enabled	The current process does not support multi-VPN-instance.
Opaque Capable	Opaque-LSA capability is enabled. To enable the Opaque-LSA capability, run theopaque-capability enable command.
Global DS-TE Mode	Globally configured DS-TE mode: Non-Standard IETF Mode: The IETF mode is not supported. Standard IETF Mode: The IETF mode is supported.
Graceful-restart capability	Whether graceful restart is enabled: disabled: Graceful restart is disabled. planned only: Planned-GR is supported. un-planned: Unplanned-GR is supported. totally: Totally GR is supported. planned and un-planned: Planned-GR and unplanned-GR are supported To enable the GR function, run the graceful-restart (OSPF) command.
Helper support capability	Whether the Helper mode is enabled: enabled: The Helper mode is enabled. not configured: The Helper mode is disabled. To configure a device as a GR helper, run the graceful-restart helper-role (OSPF) command.
filter capability	Whether the filtering rule of the Helper mode is enabled: ip-prefix: The IP prefix filtering rule of the Helper mode is enabled. acl-number: The basic ACL filtering rule of the Helper mode is enabled. acl-name: The named ACL filtering rule of the Helper mode is enabled. disabled: The filtering rule of the Helper mode is disabled.
policy capability	Whether a policy is configured for the Helper mode: strict lsa check: The Helper checks all LSAs. To prevent the Helper from checking AS external LSAs, run the graceful-restart helper-role ignore-external-lsa command. ignore external lsa check: The Helper does not check AS external LSAs. planned and un-planned: The Helper supports planned-GR and unplanned-GR. To configure the Helper to support only planned-GR, run the graceful-restart helper-role planned-only command. planned: The Helper supports only planned-GR.
Applications Supported: MPLS Traffic-Engineering	OSPF supports Traffic Engineering (TE).
Spf-schedule-interval	Interval for performing SPF calculation. To set the interval for OSPF to calculate routes, run the spf-schedule-interval command.
Route Preference	Preference of the default route.
ASE Route Preference	Priority of the external route.
Default ASE parameters	Default parameters of the external LSA. Metric: default metric of the external LSA. Tag: default tag of the external LSA. Type: default type of the external LSA.
SPF Computation Count	Number of times that SPF calculation is performed.
RFC 1583 Compatible	Whether RFC 1583 compatibility is enabled. To convert rules defined in RFC 2328 into rules defined in RFC 1583, run the rfc1583 compatible command.
Retransmission limitation is disabled	Retransmission limit is disabled. To enable retransmission limit and set the maximum number of retransmissions, run the retransmission-limit command.
Import routes limitation is enabled, the maximal limitation value	Maximum number of imported routes is restricted and that the maximum value is displayed.
Area Count	Number of areas in the current process.
Nssa Area Count	Number of NSSAs in the current process.
Process total up interface count	Number of interfaces that are up.
Process valid up interface count	Number of interfaces that are valid.
Flush protect mode	Whether master/slave board switching triggered by abnormal OSPF LSA aging is enabled: false: Master/Slave board switching triggered by abnormal OSPF LSA aging is disabled. true: Master/Slave board switching triggered by abnormal OSPF LSA aging is enabled.
ExChange/Loading Neighbors	Number of neighbors in the ExChange/Loading state.
Area	Information about each area in the current process, including ID of the current area in dotted decimal notation.
Authtype	Area authentication type, including none-authentication, simple authentication, MD5 authentication, HMAC-SHA256 authentication, and HMAC-MD5 authentication.
Area flag	Flag used to describe the area attributes, including Transit/Vlink/Stub/Nssa/Normal.
SPF scheduled Count	Number of times that SPF calculation is performed.
Interface	Interface information in the area.
Cost	Cost of an OSPF interface. To set the cost for an OSPF on an interface, run the ospf cost command.
State	Interface status: Down Waiting Loopback P-2-P DR BDR DROTHER DR and BDR DROTHER exist in only broadcast and NBMA networks, and P-2-P exists in only P2P and P2MP Vlinks.
Type	Interface type, including P2P, broadcast, NBMA, and P2MP.
MTU	MTU value of the interface.
Priority	Interface priority.
Designated Router	(Optional) the current interface is not the DR.
Backup Designated Router	(Optional) the current interface is not the BDR.
Timers	Interval of the timer.
Hello	Interval of the Hello timer. To set the interval for sending Hello packets on an interface, run the ospf timer hello command.
Dead	Interval of the Dead timer. To set the dead interval after which an interface considers its OSPF neighbor invalid, run the ospf timer dead command.
Poll	Interval of the Poll timer. To set the poll interval for sending Hello packets on NBMA networks, run the ospf timer poll command.
Retransmit	Interval of the Retransmit timer. To set the interval for retransmitting LSA on an interface, run the ospf timer retransmit command.
Transmit Delay	(Optional) delay for transmitting LSAs on the interface. To add the transmission delay to LSAs before they are sent by an interface, run the ospf trans-delay command.
Router ID conflict state	Status of the automatic recovery function. The value can be one of the following: Normal: The automatic recovery function is properly detecting router ID conflict. Wait select: The automatic recovery function delays defining a new router ID if the device starts after an unexpected delay (two hours by default). Selecting: The automatic recovery function restarts the OSPF process with the router ID and waits for the restarted OSPF process to take effect. RtrId Changed: The automatic recovery function determines whether router ID conflict occurs after the new router ID takes effect and returns to the Normal state if no new router ID conflict is detected. Suspend: If the maximum number of conflict times is reached, automatic recovery function does not define a new router ID any longer. The maximum number of conflict times is three by default.
Area interface up count	The number of interfaces up in the area.

Related Topics

display ospf cumulative

Function

The display ospf cumulative command displays OSPF statistics.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] cumulative

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, statistics of all the OSPF processes are displayed.	The value is an integer ranging from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output helps you troubleshoot OSPF faults.

Example

# Display OSPF statistics.

<HUAWEI> display ospf cumulative

          OSPF Process 1 with Router ID 10.1.1.1
                  Cumulations

  IO Statistics
             Type        Input     Output
            Hello           26         62
   DB Description            3          2
   Link-State Req            1          1
Link-State Update            5          5
   Link-State Ack            3          3
  ASE: 2  Checksum Sum: 233779
  LSAs originated by this router

  Router: 1
  Network: 0
  Sum-Net: 0
  Sum-Asbr: 0
  External: 3
  NSSA: 0
  Opq-Link: 0
  Opq-Area: 0
  Opq-As: 0
  LSAs Originated: 4  LSAs Received: 14

  Routing Table:
    Intra Area: 2  Inter Area: 0  ASE: 2

  Up Interface Cumulate: 2

      Neighbor Cumulate:
  =======================================================

      Neighbor cumulative data. (Process 1)
  -------------------------------------------------------
  Down:       0 Init:        0 Attempt:    0 2-Way:    0
  Exstart:    0 Exchange:    0 Loading:    0 Full:     1
  Retransmit Count: 0

      Neighbor cumulative data. (Total)
  -------------------------------------------------------
  Down:       0 Init:        0 Attempt:    0 2-Way:    0
  Exstart:    0 Exchange:    0 Loading:    0 Full:     1
  Retransmit Count: 0

Table 7-30 Description of the display ospf cumulative command output

Item	Description
IO Statistics	Statistics of the transmitted packets and LSAs.
Type	OSPF packet type.
Input	Number of received packets.
Output	Number of sent packets.
Hello	OSPF Hello packet.
DB Description	OSPF Database Description packet.
Link-State Req	OSPF Link State Request packet.
Link-State Update	OSPF Link State Update packet.
Link-State Ack	OSPF Link State Acknowledgement packet.
Checksum Sum	Checksum of the AS external LSA.
ASE	Number of ASE routes (If there are no ASE routes, Disabled is displayed.).
LSAs originated by this router	Detailed statistics of the transmitted LSAs.
Router	Router LSA.
Network	Network LSA.
Sum-Net	Type 3 summary LSA.
Sum-Asbr	Type 4 summary LSA.
External	AS external LSA.
NSSA	NSSA.
Opq-Link	Number of Type 9 Opque LSAs.
Opq-Area	Number of Type 10 Opque LSAs.
Opq-As	Number of Type 11 Opque LSAs
LSAs Originated	Generated LSAs.
LSAs Received	Received LSAs.
Routing Table	Routing table.
Intra Area	Number of intra-area routes.
Inter Area	Number of inter-area routes.
Up Interface Cumulate	Statistics of up state interface.
Neighbor Cumulate	Statistics of neighbors.
Neighbor cumulative data	Detailed statistics of neighbors: Down Init Attempt 2-Way Exstart Exchange Loading Full
Retransmit Count	Total number of nodes in the retransmission list.

Related Topics

display ospf error

Function

The display ospf error command displays OSPF error information.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] error [ lsa | interface interface-type interface-number ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, error information of all OSPF processes is displayed.	The value is an integer ranging from 1 to 65535.
lsa	Displays the OSPF LSA errors.	-
interface interface-type interface-number	Specifies the type and number of an interface.	-

Parameter

Description

Value

process-id

Specifies the ID of an OSPF process.

If no OSPF process ID is specified, error information of all OSPF processes is displayed.

The value is an integer ranging from 1 to 65535.

lsa

Displays the OSPF LSA errors.

interface interface-type interface-number

Specifies the type and number of an interface.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

When locating OSPF faults, you can run the display ospf error command to obtain OSPF error information. You can then analyze OSPF faults according to the OSPF error information.

Example

# Display OSPF error information.

<HUAWEI> display ospf error

          OSPF Process 1 with Router ID 10.1.1.1
                  OSPF error statistics

General packet errors:
 0     : IP: received my own packet     0     : Bad packet
 0     : Bad version                    0     : Bad checksum
 0     : Bad area id                    0     : Drop on unnumbered interface
 1     : Bad virtual link               0     : Bad authentication type
 0     : Bad authentication key         0     : Packet too small
 0     : Packet size > ip length        0     : Transmit error
 0     : Interface down                 0     : Unknown neighbor
 0     : Bad net segment                0     : Extern option mismatch
 0     : Router id confusion                0     : Bad authentication sequence number

HELLO packet errors:
 0     : Netmask mismatch               0     : Hello timer mismatch
 0     : Dead timer mismatch            0     : Virtual neighbor unknown
 0     : NBMA neighbor unknown          0     : Invalid Source Address

DD packet errors:
 0     : Neighbor state low             0     : Unknown LSA type
 0     : MTU option mismatch

LS ACK packet errors:
 0     : Neighbor state low             0     : Unknown LSA type

LS REQ packet errors:
 0     : Neighbor state low             0     : Empty request
 0     : Bad request

LS UPD packet errors:
 0     : Neighbor state low             0     : Newer self-generate LSA
 0     : LSA checksum bad               0     : Received less recent LSA
 0     : Unknown LSA type

Opaque errors:
 0     : 9-out of flooding scope        0     : 10-out of flooding scope
 0     : 11-out of flooding scope       0     : Unknown TLV type

Retransmission for packet over Limitation errors:
 0     : Number for DD Packet           0     : Number for Update Packet
 0     : Number for Request Packet

Receive Grace LSA errors:
 0     : Number of invalid LSAs         0     : Number of policy failed LSAs
 0     : Number of wrong period LSAs

Configuration errors:
0     : Tunnel cost mistake

Table 7-31 Description of the display ospf error command output

Item	Description
General packet errors	Indicates general packet errors.
IP: received my own packet	Indicates that the packet sent by its own interface is received and therefore the packet is not processed.
Bad packet	Indicates that the parsed packet is incorrect, including the checksum of the length field.
Bad version	Indicates that the OSPF version is incorrect, that is, it is not version 2.
Bad checksum	Indicates that the OSPF checksum is incorrect.
Bad area id	Indicates that the area ID in the received packet does not match the local area ID. (Vlink can receive packets from only Area 0 and its own area.)
Drop on unnumbered interface	Indicates that the unnumbered rather than P2P interface receives packets (the interface must be of the P2P type).
Bad virtual link	Indicates that the Vlink receives invalid packets.
Bad authentication type	Indicates that packet authentication is incorrect. If the value of this field keeps increasing, the OSPF authentication types of the two devices that establish the neighbor relationship are inconsistent. In this case, run the area-authentication-mode command to configure the same authentication type for the two devices.
Bad authentication key	Packet authentication key is incorrect.
Packet too small	Indicates that the length of the received packet does not equal the sum of the IP header length and the packet length.
Packet size > ip length	Indicates that the length of the OSPF packet is greater than the permitted length of the IP packet.
Transmit error	Indicates that sending packets to the socket fails.
Interface down	Indicates the number of times that the OSPF interface goes Down.
Unknown neighbor	Indicates that OSPF packets are received from non-OSPF neighbors on NBMA networks, virtual links, and sham links.
HELLO packet errors	Indicates Hello packet errors.
Netmask mismatch	Indicates that the address mask does not match the local address mask.
Hello timer mismatch	Indicates that the Hello intervals on the two ends are inconsistent. If the value of this field keeps increasing, the value of the Hello timers on the two devices that establish the neighbor relationship are inconsistent. In this case, check the interface configurations of the two devices and run the ospf timer hello command to set the same value for the Hello timers.
Dead timer mismatch	Indicates that the Dead intervals on the two ends are inconsistent. If the value of this field keeps increasing, the values of the dead timers on the two devices that establish the neighbor relationship are inconsistent. In this case, check the interface configurations of the two devices and run the ospf timer dead command to set the same value for the dead timers.
Extern option mismatch	Indicates that the extension attributes of the Hello packets on the two ends are inconsistent. If the value of this field keeps increasing, the area types of the two devices that establish the neighbor relationship are inconsistent (the area type of one device is common area, and the area type of the other device is stub area or NSSA). In this case, configure the same area type for the two devices (in the OSPF area view, the stub command indicates the area type is stub and the stub command indicates the area type is nssa).
Bad net segment	The source address of received packets is not on the same network segment as the IP address of the interface that receives packets.
Router id confusion	Indicates that the router IDs on the two ends are the same.
Bad authentication sequence number	Indicates bad authentication sequence number errors.
Virtual neighbor unknown	Indicates that the router ID of the packet is inconsistent with that of the neighbor that is configured by the virtual link.
NBMA neighbor unknown	Indicates that the status of the NBMA neighbor is not active.
Invalid Source Address	Indicates that the source address of LSA is invalid.
DD packet errors	Indicates DD packet errors.
Neighbor state low	Indicates the following situations: A DD packet is received but its neighbor status is lower than 2-way. An LSR packet is received but its neighbor status is lower than Exchange. An LSU packet is received but its neighbor status is lower than Exchange. An LSAck packet is received but its neighbor status is lower than Exchange.
Unknown LSA type	Indicates the unknown LSA type.
MTU option mismatch	Indicates that the MTU check of the OSPF interface is enabled and the MTU of the DD packet received by the interface is greater than the MTU of the interface.
LS ACK packet errors	Indicates LSAck packet errors.
Bad ack	Indicates the number of times that incorrect LSAck packets are received.
Duplicate ack	Indicates the number of times that duplicate LSAck packets are received.
LS REQ packet errors	Indicates LSR packet errors.
Empty request	Indicates empty LSR packets.
Bad request	Indicates the BadRequest event in the protocol.
LS UPD packet errors	Indicates LSU packet errors.
Newer self-generate LSA	Indicates the number of new self-generated LSAs. This field is reserved for future use.
LSA checksum bad	Indicates that the LSA checksum is incorrect.
Received less recent LSA	Indicates that the LSA older than the local LSA is received.
Opaque errors	Indicates opaque errors.
9-out of flooding scope	Indicates the number of Type 9 LSAs that exceed the flooding scope.
10-out of flooding scope	Indicates the number of Type 10 LSAs that exceed the flooding scope.
11-out of flooding scope	Indicates the number of Type 11 LSAs that exceed the flooding scope.
Unknown TLV type	Indicates the unknown TLV type.
Retransmission for packet over Limitation errors	Indicates the number of times that retransmitting packets expires.
Number for DD Packet	Indicates the number of times that retransmitting DD packets expires.
Number for Update Packet	Indicates the number of times that retransmitting LSU packets expires.
Number for Request Packet	Indicates the number of times that retransmitting LSR packets expires.
Receive Grace LSA errors	Indicates the number of received incorrect Grace LSAs.
Number of invalid LSAs	Indicates the total number of invalid LSAs.
Number of policy failed LSAs	Indicates the total number of policy failed LSAs.
Number of wrong period LSAs	Indicates the total number of wrong period LSAs.
Configuration errors	Indicates configuration errors.
Tunnel cost mistake	Indicates the number of times that the cost of the OSPF tunnel interface is smaller than 1. This count increases by one each time the cost of the OSPF tunnel interface is smaller than one. If the cost is smaller than one, the cost is calculated as one.

# Display the OSPF LSA errors.

<HUAWEI> display ospf error lsa

 OSPF Process  1  with Router ID 10.1.1.14

 Last Received Bad LSA Header
    LS Age             : 36
    Link State Type    : 0x0008
    Link State ID      : 0.0.1.66
    Advertising Router : 10.10.10.22
    LS Sequence Number : 0x80000002
    LS Checksum        : 0x00bd2e
    Length             : 96
    Interface          : Vlanif100
    Recv Time          : 2011-05-27 14:37:17

Table 7-32 Description of the display ospf error lsa command output

Item	Description
Last Received Bad LSA Header	Bad LSA information received last time.
LS Age	Aging time of the LSA.
Link State Type	LSA type.
Link State ID	LSA state ID.
Advertising Router	Router that advertises or generates LSAs.
LS Sequence Number	Sequence number in the LSA header.
LS Checksum	LSA checksum.
Length	Size of the LSA.
Interface	LSA receiving interface.
Recv Time	LSA receiving time.

display ospf global-statistics

Function

The display ospf global-statistics command displays global OSPF statistics. If no OSPF process ID is specified, brief information about all the OSPF processes is displayed.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf global-statistics { process process-id | vpn-instance vpn-instance-name | public-instance | timewheel | brief }

Parameters

Parameter	Description	Value
process process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
vpn-instance vpn-instance-name	Specifies the name of a VPN instance.	The value must be an existing VPN instance name.
public-instance	Displays the statistics of all the public network instances.	-
timewheel	Displays the number of updated or aged LSAs in different periods.	-
brief	Displays brief information.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display ospf global-statistics command to check global OSPF statistics for fault location.

Example

# Display global OSPF statistics, including statistics of neighbors, processes, and instances.

<HUAWEI> display ospf global-statistics brief
  Neighbor cumulative data (OSPF total statistics):
  ----------------------------------------------------------
  Down:               0        Init:                  0      Attempt:     0    2-Way:     0
  Exstart:            0        Exchange:              0      Loading:     0    Full:   2400
  Instance Numer:     1        Process Number:        2
  HighSocketExpire:   27       HighSocketEmpty:  526275
  Total Neighbor Number:                   0                                    
  Total Press:   LOW

Table 7-33 Description of the display ospf global-statistics brief command output

Item	Description
Neighbor cumulative data (OSPF total statistics)	Neighbor statistics.
Instance Number	Number of instances, including public network instances and VPN instances.
Process Number	Number of OSPF processes running on the device.
HighSocketExpire	Number of unprocessed messages in high-priority queues.
HighSocketEmpty	Number of processed messages in high-priority queues.
Total Neighbor Number	Total number of OSPF neighbors.
Total Press	Total pressure of the current service. In most cases, the Total Press field is LOW. If the number of retransmission timers or the number of LSAs being flooded in the OSPF processes exceeds a certain value (default 300), or the number of OSPF neighbors exceeds 300, the Total Press field is HIGH. If the number of retransmission timers and the number of LSAs being flooded in the OSPF processes fall below a certain value (default 300), or the number of OSPF neighbors falls below 300, the Total Press field is LOW.

# Display global statistics of OSPF process 1.

<HUAWEI> display ospf global-statistics process 1
  OSPF 1 statistics data:
  -----------------------------------------
  LSA NUM of Flood cache:          0
  Packet NUM of FloodUpdt Hash:          0
  Packet NUM of Flood Queue:          0

Table 7-34 Description of the display ospf global-statistics process 1 command output

Item	Description
LSA NUM of Flood cache	Number of LSAs being flooded in the OSPF process.
Packet NUM of FloodUpdt Hash	Number of Update packets waiting to be flooded in the OSPF process, and the total size of the Update packets does not reach the MTU.
Packet NUM of Flood Queue	Number of Update packets waiting to be flooded in the OSPF process, and the total size of the Update packets reaches the MTU.

# Display OSPF time wheel information.

<HUAWEI> display ospf global-statistics timewheel
 =================== TimeWheel Info Begin ===================
 TimeWheel current index is 2845, datanode count is 8
 Bucket Number: 3596, Expiry time: 1306(s), Datanode Count: 0
 High expiry time: 0, Low expiry time 527742(s)
 Bucket Number: 3597, Expiry time: 1307(s), Datanode Count: 0
 High expiry time: 0, Low expiry time 527743(s)
 Bucket Number: 3598, Expiry time: 1308(s), Datanode Count: 0

Table 7-35 Description of the display ospf global-statistics timewheel command output

Item	Description
TimeWheel current index	Current index of the time wheel.
datanode count	Total number of nodes in the time wheel.
Bucket Number	Total number of indexes of the time wheel.
Expiry time	Expiry time of the index.
High expiry time	High expiry time corresponding to the index in the time wheel after the system starts.
Low expiry time	Low expiry time corresponding to the index in the time wheel after the system starts.

Related Topics

display ospf cumulative

display ospf graceful-restart

Function

The display ospf graceful-restart command displays the status of OSPF GR.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] graceful-restart [ verbose ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
verbose	Displays detailed information about OSPF GR.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display ospf graceful-restart command to view details and statistics of the GR.

Example

# Display OSPF GR information.

<HUAWEI> display ospf graceful-restart

          OSPF Process 1 with Router ID 10.1.1.1
 Graceful-restart capability     : enabled
 Graceful-restart support        : planned and un-planned, totally
 Helper-policy support           : planned and un-planned, strict lsa check
 Current GR state                : normal
 Graceful-restart period         : 120 seconds

 Number of neighbors under helper:
  Normal neighbors    : 0
  Virtual neighbors   : 0
  Sham-link neighbors : 0
  Total neighbors     : 0

 Number of restarting neighbors : 0

 Last exit reason:
  On graceful restart : successful exit
  On Helper           : none

# Display detailed information about OSPF GR.

<HUAWEI> display ospf graceful-restart verbose

          OSPF Process 1 with Router ID 10.1.1.1
 Graceful-restart capability     : enabled
 Graceful-restart support        : planned and un-planned, totally
 Helper-policy support           : planned and un-planned, strict lsa check
 Current GR state                : normal
 Graceful-restart period         : 120 seconds

 Number of neighbors under helper:
  Normal neighbors    : 0
  Virtual neighbors   : 0
  Sham-link neighbors : 0
  Total neighbors     : 0
 Number of restarting neighbors : 0

 Last exit reason:
  On graceful restart : successful exit
  On Helper           : none

 All area count      : 1

                 Area ID    : 0.0.0.0

 Authtype       : None     Area flag : Normal

 Normal interface count: 1

 Interface: 10.1.1.1 (Vlanif100)
 GR state : normal                  State: P-2-P          Type: P2P
 Last Helper Exit reason: none
 Neighbor count of this interface : 1

 Neighbor          IP address        GR state    Last Helper Exit reason
 10.2.2.2          10.1.1.2          Normal      none

Table 7-36 Description of the display ospf graceful-restart command output

Item	Description
Graceful-restart capability	Whether IETF GR is enabled: enabled disabled
Graceful-restart support	IETF GR mode that is supported currently: planned: indicates that only planned-GR is supported. planned and un-planned: indicates that both planned GR and unplanned GR are supported. totally: indicates that totally GR is supported. partial: indicates that partial GR is supported.
Helper-policy support	Policy that supports the Helper: planned: indicates that the Helper supports only planned GR. planned and un-planned: indicates the Helper supports both planned GR and unplanned GR. strict lsa check: indicates that the Helper supports strict external LSA check. ignore external lsa check: indicates that the Helper does not check external LSAs. never: indicates that the device does not support the Helper mode.
Current GR state	Current GR status: Normal: indicates that GR is in the Normal state. Under GR: indicates that the device enters the Restarter mode. Under Helper: indicates that the device enters the Helper mode.
Graceful-restart period	GR period.
Number of neighbors under helper	Number of neighbors in the Helper state: Normal neighbors: indicates the number of normal neighbors. Virtual neighbors: indicates the number of virtual neighbors. Sham-link neighbors: indicates the number of sham link neighbors. Total neighbors: indicates the total number of neighbors.
Number of restarting neighbors	Number of restarted devices displayed on the Helper.
Last exit reason	Reason why a device exits from GR last time: On graceful restart: indicates the reason that the Restarter exits from GR. On Helper: indicates the reason that the Helper exits from GR.
On graceful restart	Reason why the Restarter exits from GR: 1-way hello received: indicates that 1-way Hello packets are received. back-link check failed: indicates that the back link check fails. DR election fail: indicates that DR election fails. grace period expired: indicates that the GR period expires. interface state change: indicates that the interface state machine changes. none: indicates that the device never performs GR since startup. successful exit: indicates that the Restarter successfully exits from GR. two Grace-LSAs received: indicates that two Grace LSAs are received.
On Helper	Reason why the Helper exits from GR: flooding change LSA: indicates that the changed LSAs are received. grace period expired: indicates that the GR period expires. graceful restart unconfigured at process level: indicates that the GR function of the OSPF process is disabled. interface state change: indicates that the interface state machine changes. policy check failed for received grace LSA: indicates the policy that mismatches the Helper. received 1-way hello packet: indicates that 1-way Hello packets are received. received flushed grace LSA: indicates that flushed Grace LSAs are received. received multiple grace LSA: indicates that multiple Grace LSAs are received. neighbor reset: indicates that GR is disabled when neighbors are in the Helper mode. none: indicates that the device never enters the Helper mode since startup. successful exit: indicates that the Helper successfully exits from GR.
All area count	Number of areas in the process.
Area ID	Area ID.
Authtype	Authentication type.
Area flag	Area attributes: Normal NSSA Stub
Normal interface count	Number of interfaces in the area.
Interface	IP address of the interface.
GR state	GR status of the interface: Normal: indicates that the device is in the Normal state. Restarter: indicates that the device enters the Restarter mode. Helper: indicates that the device enters the Helper mode.
State	Interface status: P-2-P DR BDR DROther Waiting Down
Type	Interface type: P2P P2MP NBMA Broadcast
Last Helper Exit reason	Reason why the neighbor exits from the Helper mode the last time: none: indicates that the device never enters the Helper mode since startup. successful exit: indicates that the neighbor successfully exits from the Helper mode. grace period expired: indicates that the GR period expires. received flushed grace LSA: indicates that flushed Grace LSAs are received. flooding change LSA: indicates that the changed LSAs are received. received multiple grace LSA: indicates that multiple Grace LSAs are received. received 1-way hello packet: indicates that 1-way Hello packets are received. policy check failed for received grace LSA: indicates the policy that mismatches the Helper. neighbor reset: indicates that the network topology changes after the reset command is run on the neighbor of the Helper. interface state change: indicates that the interface state machine changes. graceful restart unconfigured at process level: indicates that the neighbor is not configured with the GR function.
Neighbor count of this interface	Total number of neighbors of this interface.
Neighbor	Router ID of the neighbor.
IP address	IP address of the neighboring interface.
GR state	GR status of the neighbor: Normal: indicates that the neighbor is in the Normal state. Restarter: indicates that the neighbor enters the Restarter mode. Helper: indicates that the neighbor enters the Helper mode.

display ospf interface

Function

The display ospf interface command displays information about OSPF interfaces.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] interface [ all | interface-type interface-number ] [ verbose ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
all	Displays information about all OSPF interfaces.	-
interface-type interface-number	Specifies the interface type and the interface number.	-
verbose	Display verbose configuration information.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display ospf interface command output displays the configuration and operating status of OSPF, which facilitate fault location and configuration verification.

Example

# Display OSPF interface information.

<HUAWEI> display ospf interface

          OSPF Process 1 with Router ID 192.168.1.1
                  Interfaces

 Area: 0.0.0.0        (MPLS TE not enabled)
 IP Address      Type         State    Cost  Pri   DR              BDR
 192.168.1.2     Broadcast    DR       1     1     192.168.1.2     192.168.1.3

 Area: 0.0.0.1        (MPLS TE not enabled)
 IP Address      Type         State    Cost  Pri   DR              BDR
 172.16.0.1      Broadcast    DR       1     1     172.16.0.1      172.16.0.2

Table 7-37 Description of the display ospf interface command output

Item	Description
Area	ID of the area to which the interface belongs.
IP Address	IP address of the interface (regardless of whether TE is enabled on the interface).
Type	Interface type: P2P, PTMP, broadcast, or NBMA
State	Status of the interface, which is determined by the OSPF interface state machines: Down: The status of the interface is Down. If an interface is Down, the interface is unavailable and cannot be used to transmit traffic. Loopback: The interface connecting to the network on the device is in the Loopback state. The loopback interface cannot be used to transmit data but can collect interface information by performing the ICMP ping operation or bit error detection. Waiting: The device is determining the DR and BDR on the network. The DR or BDR election mechanism should not be implemented until the waiting period ends. This prevents unnecessary changes in the DR and BDR roles. P-2-P: The interface is connected to a P2P network or a virtual link. DROther: The device itself is not elected as the DR or BDR. Instead, another device connecting to the broadcast network or NBMA network is elected as the DR. The device starts to set up adjacency with the DR and BDR (if existing). BDR: The device functions as the BDR on the network, and will turn into a DR when the current DR fails. The device sets up adjacency with other devices that access the network. DR: The device functions as the DR on the network. The device sets up adjacency with other devices that access the network.
Cost	Cost of the interface.
Pri	Priority of the device interface during the DR and BDR election The greater the value, the higher the priority.
DR	DR of the network where the interface resides.
BDR	BDR of the network where the interface resides.
Timer Hello	Interval for sending Hello packets.

# Display detailed information about an OSPF interface.

<HUAWEI> display ospf interface Vlanif 501 verbose

         OSPF Process 1 with Router ID 192.168.2.1
                 Interfaces 


 Interface: 192.168.100.2 (Vlanif501)
 Cost: 1       State: BDR       Type: Broadcast    MTU: 1500  
 Priority: 1
 Designated Router: 192.168.100.1
 Backup Designated Router: 192.168.100.2
 Timers: Hello 10 , Dead 40 , Poll  120 , Retransmit 5 , Transmit Delay 1 
  IO Statistics
             Type        Input     Output
            Hello           11         10
   DB Description            3          2
   Link-State Req            1          1
Link-State Update            4          3
   Link-State Ack            2          3
 ALLSPF GROUP
 ALLDR GROUP
 OpaqueId: 0   PrevState: Waiting
 Effective cost: 1, enabled by OSPF Protocol
 Suppress flapping peer: enable(flapping-count: 0, threshold: 10)

Table 7-38 Description of the display ospf interface verbose command output

Item	Description
IO Statistics	Statistics about received and sent OSPF packets.
Type	OSPF packet type.
Input	Number of OSPF packets that the interface receives.
Output	Number of OSPF packets sent by the interface.
DB Description	Statistics about received and sent OSPF DD packets.
Link-State Req	Statistics about received and sent OSPF LSR packets.
Link-State Update	Statistics about received and sent OSPF LSU packets.
Link-State Ack	Statistics about received and sent OSPF LSAck packets.
ALLSPF GROUP	ALLSPF GROUP that the interface joins.
ALLDR GROUP	ALLDR GROUP that the interface joins.
OpaqueId	Opaque ID of the interface.
PrevState	Previous state of the interface.
Effective cost	Effective cost of the interface, which may be any of the following values: enabled by OSPF Protocol: default value or the one configured using the ospf cost command. enabled by RUI: RUI route cost. enabled by IGP_LDP: interface cost configured in LDP. enabled by BGP_IGP: interface cost configured in BGP. enabled by Tunnel: cost generated after a TE Tunnel is configured.
Suppress flapping peer	Status of OSPF neighbor relationship flapping suppression: enable: OSPF neighbor relationship flapping suppression is enabled. flapping-count: number of valid flapping_events If the interval between two successive neighbor status changes from Full to a non-Full state is shorter than detecting-interval, a valid flapping_event is recorded, and the flapping_count increases by 1. To change detecting-interval, run the ospf suppress-flapping peer detecting-interval detecting-interval command. threshold: flapping suppression threshold When the flapping_count reaches or exceeds threshold, flapping suppression takes effect. To configure the threshold, run the ospf suppress-flapping peer threshold threshold command. disable: OSPF neighbor relationship flapping suppression is disabled. In this case, the following information is displayed, without flapping-count or threshold: Suppress flapping peer: disable hold-down: OSPF neighbor relationship flapping suppression works in Hold-down mode. In this case, an example of the displayed information is as follows: Suppress flapping peer: hold-down(start: 2016-01-02 09:58:41, remain-interval: 476 sec) start: time when the flapping suppression started remain-interval: remaining time of the flapping suppression hold-max-cost: OSPF neighbor relationship flapping suppression works in Hold-max-cost mode. In this case, an example of the displayed information is as follows: Suppress flapping peer: hold-max-cost(start: 2016-01-02 09:58:41, remain-interval: 476 sec)

Related Topics

display ospf lsdb

Function

The display ospf lsdb command displays an OSPF Link-State Database (LSDB).

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] lsdb [ brief ]

display ospf [ process-id ] lsdb [ { router | network | summary | asbr | ase | nssa | opaque-link | opaque-area | opaque-as } [ link-state-id ] ] [ originate-router [ advertising-router-id ] | self-originate ] [ age { min-value min-age-value | max-value max-age-value } ^* ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
brief	Displays brief information about the LSDB.	-
router	Displays information about the router LSA.	-
network	Displays information about the network LSA.	-
summary	Displays information about the network summary LSA.	-
asbr	Displays information about the ASBR summary LSA.	-
ase	Displays information about the AS external LSA.	-
nssa	Displays information about the status of external links in the NSSA.	-
opaque-link	Displays information about the opaque link LSA.	-
opaque-area	Displays information about the opaque area LSA.	-
opaque-as	Displays information about the opaque AS LSA.	-
originate-router	Displays the LSA of the advertising router.	-
link-state-id	Specifies the ID of an LSA.	The value is an IP address in dotted decimal notation.
advertising-router-id	Specifies the router ID of the device that advertises the LSA.	The value is an IP address in dotted decimal notation.
self-originate	Displays information about the self-originated LSA.	-
age	Displays the LSAs that meet the age filtering rule.	-
min-value min-age-value	Displays information about only LASs with the age value greater than or equal to the min-age-value value.	The value is an integer ranging from 0 to 3600.
max-value max-age-value	Displays information only about LASs with the age value less than or equal to the max-age-value value.	The value is an integer ranging from 0 to 3600.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

To check information about the LSDB, run the display ospf lsdb command. You can choose to view:

Brief information about the LSDB
LSAs of a specified type
LSAs of the originating device
Locally originated LSAs

The command output helps you troubleshoot OSPF faults.

Example

# Display brief information about the OSPF LSDB.

<HUAWEI> display ospf lsdb

          OSPF Process 1 with Router ID 10.1.1.1                                 
                  Link State Database                                           
                                                                                
                          Area: 0.0.0.0                                         
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 Router    10.1.1.1        10.1.1.1          1348  48    800007C9    10000
 Router    10.1.1.2        10.1.1.2          1078  60    80000654       0
 Network   192.168.10.1    192.168.10.1      1349  32    80000060       0

                  AS External Database
 Type      LinkState ID    AdvRouter          Age  Len   Sequence   Metric
 External  0.0.0.0         10.1.1.2          1743  36    800005FE       1

Table 7-39 Description of the display ospf lsdb command output

Item	Description
Area	Area whose LSDB information needs to be displayed.
Type	LSA type: Router, Network, Sum-Net, Sum-Asbr, NSSA, External, Opq-Link, Opq-Area, and Opq-As.
LinkState ID	Link State ID in the LSA header.
AdvRouter	Device that advertises or generates LSAs.
Age	Aging time of the LSA.
Len	Size of the LSA.
Sequence	Sequence number in the LSA header.
Metric	Metric.
AS External Database	LSDB that contains external LSAs.

# Display information about router LSAs in the LSDB.

<HUAWEI> display ospf lsdb router

          OSPF Process 1 with Router ID 10.1.1.1
                          Area: 0.0.0.0
                  Link State Database

  Type      : Router
  Ls id     : 10.2.2.2
  Adv rtr   : 10.2.2.2
  Ls age    : 52
  Len       : 48
  Options   :  E
  seq#      : 80000006
  chksum    : 0xbf5a
  Link count: 2
     Link ID: 10.2.1.2
     Data   : 10.2.1.2
     Link Type: TransNet
     Metric : 1
     Link ID: 10.2.2.2
     Data   : 255.255.255.255
     Link Type: StubNet
     Metric : 0
     Priority : Medium

Table 7-40 Description of the display ospf lsdb router command output

Item	Description
Ls id	Link State ID in the LSA header.
Adv rtr	Device that advertises or generates LSAs.
Ls age	Aging time of the LSA.
Len	Size of the LSA.
Options	Options field as below: E: allows Flood AS-external-LSAs. MC: forwards IP multicast packets. N/P: processes Type-7 LSAs. DC: processes the required links.
seq#	Sequence number, which is used to check the order of LSAs.
chksum	LSA checksum.
Link count	Number of links.
Link ID	Link ID of the router LSA, which is classified according to the link type. If the type of link is Point-to-Point, Link ID indicates the router ID of a neighbor. If the type of link is TransNet, Link ID indicates IP address of DR. If the type of link is Stub, Link ID indicates IP address. If the type of link is Virtual Link, Link ID indicates the router ID of a neighbor.
Data	Link data of the router LSA. If the type of link is Point-to-Point, TransNet, or Virtual Link, Data indicates IP address. If the type of link is Stub, Data indicates mask of IP address.
Link Type	Link type of the router LSA: P-2-P, TransNet, StubNet, or Virtual.
Metric	Link metric of the router LSA.
Priority	OSPF convergence priorities: Critical: indicates that the convergence priority of OSPF routes is critical. High: indicates that the convergence priority of OSPF routes is high. Medium: indicates that the convergence priority of OSPF routes is medium. Low: indicates that the convergence priority of OSPF routes is low.

# Display information about network LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb network 10.1.1.1

          OSPF Process 1 with Router ID 10.1.1.1
                          Area: 0.0.0.0
                  Link State Database

  Type      : Network
  Ls id     : 10.1.1.1
  Adv rtr   : 10.1.1.1
  Ls age    : 167
  Len       : 32
  Options   :  E
  seq#      : 80000002
  chksum    : 0x3408
  Net mask  : 255.255.255.0

  Attached Router    10.2.2.2
  Attached Router    10.1.1.1

Table 7-41 Description of the display ospf lsdb network command output

Item	Description
Net mask	Network mask of the network LSA.
Attached Router	Device that is connected to the network.

# Display information about network summary LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb summary 10.20.1.0

          OSPF Process 1 with Router ID 10.1.1.1
                    Area: 0.0.0.0
                  Link State Database

  Type      : Sum-Net
  Ls id     : 10.1.1.0
  Adv rtr   : 10.2.2.2
  Ls age    : 419
  Len       : 28
  Options   :  E
  seq#      : 80000001
  chksum    : 0x1d21
  Net mask  : 255.255.255.0
  Tos 0  metric: 1       
  Priority  : Medium

Table 7-42 Description of the display ospf lsdb summary command output

Item	Description
Net mask	Network mask of the network summary LSA.
Tos	Type of service of the network summary LSA.
Metric	Metric or cost of the route from the advertising router to the network, which is carried in the network summary LSA.
Priority	OSPF convergence priorities: Critical: indicates that the convergence priority of OSPF routes is critical. High: indicates that the convergence priority of OSPF routes is high. Medium: indicates that the convergence priority of OSPF routes is medium. Low: indicates that the convergence priority of OSPF routes is low.

# Display information about ASBR summary LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb asbr 10.2.2.2

          OSPF Process 1 with Router ID 10.1.1.1
                    Area: 0.0.0.2
                  Link State Database

  Type      : Sum-Asbr
  Ls id     : 10.2.2.2
  Adv rtr   : 10.1.1.1
  Ls age    : 90
  Len       : 28
  Options   :  E
  seq#      : 80000001
  chksum    : 0xec62
  Tos 0  metric: 1

# Display information about AS external LSAs in the LSDB.

<HUAWEI> display ospf 100 lsdb ase 10.1.1.0

OSPF Process 1 with Router ID 10.1.1.1
Link State Database

  Type      : External
  Ls id     : 10.1.1.0
  Adv rtr   : 10.2.2.2
  Ls age    : 569
  Len       : 36
  Options   :  E
  seq#      : 80000002
  chksum    : 0x90d0
  Net mask  : 255.255.255.0
  Tos 0  Metric: 1
  E type    : 2
  Forwarding Address : 0.0.0.0
  Tag       : 1
  Priority  : Medium

Table 7-43 Description of the display ospf lsdb ase command output

Item	Description
Net mask	Network mask of the ASE or NSSA LSA.
Tos	Type of service of the ASE or NSSA LSA.
Metric	Metric or cost of the route from the advertising router to the network, which is carried in the ASE or NSSA LSA.
E type	E type of the ASE or NSSA LSA.
Forwarding Address	Forwarding address of the ASE or NSSA LSA.
Tag	32-bit tag, which is carried in Type 5 and Type 7 LSAs to avoid routing loops
Priority	OSPF convergence priorities: Critical: indicates that the convergence priority of OSPF routes is critical. High: indicates that the convergence priority of OSPF routes is high. Medium: indicates that the convergence priority of OSPF routes is medium. Low: indicates that the convergence priority of OSPF routes is low.

# Display information about NSSA external LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb nssa 192.168.1.0

          OSPF Process 1 with Router ID 10.1.1.1
                    Area: 0.0.0.1
                  Link State Database

  Type      : NSSA
  Ls id     : 10.1.1.0
  Adv rtr   : 10.2.2.2
  Ls age    : 521
  Len       : 36
  Options   : None
  seq#      : 80000005
  chksum    : 0x9ea7
  Net mask  : 255.255.255.0
  Tos 0  Metric: 1
  E type    : 2
  Forwarding Address : 10.1.1.2
  Tag       : 1
  Priority  : Medium

# Display information about Opaque-link LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb opaque-link

          OSPF Process 1 with Router ID 10.1.1.1
Area: 0.0.0.0                                          
                 Link State Database 
 Link State Database for interface 10.1.1.1 (Vlanif200) Type: Broadcast

  Type      : Opq-Link
  Ls id     : 10.0.0.0
  Adv rtr   : 10.2.2.2
  Ls age    : 12
  Len       : 44
  Options   :  E
  seq#      : 80000001
  chksum    : 0x9579
         Opaque type : 3, Opaque ID : 0
         Grace LSA TLV information:
         Grace Period        : 1800
         GR reason           : 1
         IP address          : 10.1.1.2

Table 7-44 Description of the display ospf lsdb opaque-link command output

Item	Description
Opaque type	Opaque-link LSA.
Opaque ID	Opaque ID of an Opaque-link LSA (Link state ID in the LSA header consists of Opaque type and Opaque ID.).
Grace LSA TLV information:	GR information.
Grace Period	GR waiting period.
GR reason	Cause of GR: 0: unknown 1: software 2: upgrade 3: switchover
IP address	Address of the interface that performs GR on the switch.

# Display information about Opaque-area LSAs in the LSDB.

<HUAWEI> display ospf 1 lsdb opaque-area

OSPF Process 1 with Router ID 10.1.1.1
Area: 0.0.0.0                                          
                 Link State Database 
  Type      : Opq-Area
  Ls id     : 10.0.0.1
  Adv rtr   : 10.1.1.1
  Ls age    : 639
  Len       : 200
  Options   :  E
  seq#      : 80000001
  chksum    : 0x2175
  Opaque Type: 1
  Opaque Id: 1
  Opaque lsa information:

     00 02 00 b0 00 01 00 01 02 00 00 00 00 02 00 04
     0a 01 01 01 00 03 00 04 0a 01 01 01 00 04 00 04
     00 00 00 00 00 05 00 04 00 00 00 01 80 02 00 04
     00 00 00 01 00 06 00 04 00 00 00 00 00 07 00 04
     00 00 00 00 80 00 00 04 00 00 00 00 00 09 00 04
     00 00 00 00 00 08 00 20 00 00 00 00 00 00 00 00
     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     00 00 00 00 00 00 00 00 80 01 00 20 00 00 00 00
     00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
     00 00 00 00 00 00 00 00 00 00 00 00 00 0a 00 09
     00 00 00 00 00 00 00 00 00 00 00 00 00 0c 00 04
     00 01 00 01

Related Topics

display ospf mesh-group

Function

The display ospf mesh-group command displays brief information about OSPF mesh groups.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] mesh-group [ brief ]

Parameters

Parameter

Description

Value

process-id

Specifies the ID of an OSPF process.

If no process ID is specified, brief information about mesh groups in all OSPF processes is displayed.

The value is an integer ranging from 1 to 65535.

brief

Displays brief information about mesh groups in each OSPF area.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

When concurrent links exist between a switch and its neighbor, run the mesh-group enable command to enable the mesh group function and identify the mesh group using the router ID of the switch. When receiving LSAs, the switch will select a primary link to flood LSAs. The link interface does not flood in reverse. This avoids repeated flooding, reducing link load and saving resources.

Running the display ospf mesh-group command allows you to check brief information about mesh groups in a specified process in an OSPF area.

Example

# Display brief information about OSPF mesh groups.

<HUAWEI> display ospf mesh-group

    OSPF Process 1 with Router ID 10.1.1.1
                 Mesh-Groups

Area 0.0.0.0
       Mesh-Group ID:10.2.2.2 

    Interface                IP Address/Mask      Nbr State
    Vlanif100                10.11.10.202/24      Exchange
    Vlanif200                10.22.20.202/24      Loading
    Vlanif300                10.33.30.202/24      Full
    Count of Interface in this Mesh-Group: 1
    Count of Mesh-Group in this Area: 1

Table 7-45 Description of the display ospf mesh-group command output

Item	Description
Area	OSPF area.
Mesh-Group ID	Key ID of a mesh group, namely, the router ID of a neighbor.
Interface	Interface enabled with the mesh-group feature.
IP Address/Mask	IP address and mask of the interface enabled with the mesh-group feature.
Nbr State	Neighbor status on the interface.
Count of Interface in this Mesh-Group	Number of interfaces in the mesh group.
Count of Mesh-Group in this Area	Number of mesh groups in the area.

Related Topics

mesh-group enable

display ospf nexthop

Function

The display ospf nexthop command displays OSPF next hop information.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] nexthop

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output can display information about all the OSPF next hops, which helps you troubleshoot OSPF faults.

Example

# Display OSPF next hop information.

<HUAWEI> display ospf nexthop

                OSPF Process 100 with Router ID 10.0.0.1
                       Routing Nexthop information
Next hops:
Address          Type      Refcount  IntfAddr       Intf Name
----------------------------------------------------------------------
10.0.0.1         Local     3         10.0.0.1       Vlanif100
10.0.0.2         Local     5         10.0.0.1       Vlanif100

Table 7-46 Description of the display ospf nexthop command output

Item	Description
Next hops	Detailed information about the next hop.
Address	Address of the next hop.
Type	Type of the route passing through the next hop. Local indicates that the route is destined for the local network segment.
Refcount	Number of OSPF routes that use the next hop.
IntfAddr	IP address of the interface.
Intf Name	Name of the interface.

Related Topics

display ospf peer

Function

The display ospf peer command displays information about neighbors in each OSPF area.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] peer [ [ interface-type interface-number ] [ neighbor-id ] | brief | last-nbr-down ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies the interface type and the interface number.	-
neighbor-id	Specifies the neighbor's router ID.	It is in dotted decimal notation.
brief	Displays brief information about neighbors in each OSPF area.	-
last-nbr-down	Displays brief information about the last neighbor that went Down in the OSPF area.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output can display information about OSPF neighbors, and help you troubleshoot OSPF faults, verify the configurations of OSPF neighbors, and check whether the neighbor performs Graceful Restart (GR).

Example

# Display information about the OSPF neighbor.

<HUAWEI> display ospf peer

         OSPF Process 1 with Router ID 10.1.1.2
                 Neighbors

 Area 0.0.0.0 interface 10.1.1.2(Vlanif100)'s neighbors
 Router ID: 10.1.1.1         Address: 10.1.1.1          GR State: Normal
   State: Full  Mode:Nbr is Slave  Priority: 1
   DR: 10.1.1.2  BDR: 10.1.1.1   MTU: 0
   Dead timer due in 35  sec
   Retrans timer interval: 5
   Neighbor is up for 00:00:05
   Authentication Sequence: [ 0 ]

Table 7-47 Description of the display ospf peer command output

Item	Description
Area	Area to which the neighbor belongs.
interface	Interface that connects to the neighbor.
Router ID	Router ID of the neighbor.
Address	Address of the neighboring interface.
GR State	GR status after OSPF GR is enabled: Normal: indicates that a switch is in the Normal state and does not perform GR. Doing GR: indicates that a switch is performing GR. Complete GR: indicates that a switch finishes GR. Helper: indicates that the neighbor is the Helper when a switch is performing GR.
State	Neighbor status: Down: It is the initial status of the neighbor, indicating that the neighbor does not receive any information. On an NBMA network, when the neighbor is in the Down state, Hello packets can still be transmitted at the poll interval, which is longer than the Hello interval. Attempt: It exists only on an NBMA network, indicating that two ends are attempting to establish the neighbor relationship. The interval for sending Hello packets is the Hello interval, which is shorter than the poll interval. Init: It indicates that the Hello packet has been received from the neighbor. 2-Way: It indicates that the Hello packet has been received from the neighbor, and the neighbor list of the Hello packet contains the local Router ID. That is, the two ends can interwork. ExStart: It is the first step of establishing adjacencies. In this step, the master and slave relationship and DD sequence number are negotiated. Exchange: It indicates that the LSDBs start to be synchronized. In this process, DD packets, LSR packets, and LSU packets are exchanged. Loading: It indicates that the LSDBs are being synchronized. In this process, LSR packets and LSU packets are exchanged. Full: It indicates that the LSDB of the neighbor is already synchronized, and the Full adjacency is established between both ends.
Mode	Master or slave in the process of exchanging DD packets: Nbr is Master: indicates that the neighbor is the master and actively sends DD packets. Nbr is Slave: indicates that the neighbor is the slave and cooperates with the master to send DD packets.
Priority	Priority of the neighboring device.
DR	Designated router.
BDR	Backup designated router.
MTU	MTU value of the neighboring interface.
Dead timer due in 35 sec	The dead timer due in 35 seconds.
Retrans timer interval	Interval for retransmitting LSAs, in seconds.
Neighbor is up for	Time during which the neighbor remains Up.
Authentication Sequence	Authentication sequence number.

# Display brief information about OSPF neighbors.

<HUAWEI> display ospf 1 peer brief

         OSPF Process 1 with Router ID 10.10.10.1
                   Peer Statistic Information
 ----------------------------------------------------------------------------
 Area Id         Interface                  Neighbor id      State
 0.0.0.0         Vlanif10                   10.10.10.3       Full            
 ----------------------------------------------------------------------------   
 Total Peer(s):     1

Table 7-48 Description of the display ospf peer brief command output

Item	Description
Area Id	Area to which the neighbor belongs.
Interface	Interface that connects to the neighbor.
Neighbor id	Router ID of the neighbor.
Total Peer(s)	Number of neighbors.

# Display information about the OSPF neighbor that went Down for the last time.

<HUAWEI> display ospf 1 peer last-nbr-down

          OSPF Process 1 with Router ID 10.1.1.1

                         Last Down OSPF Peer

         Neighbor Ip Address : 10.2.1.2
         Neighbor Area   Id  : 0.0.0.0
         Neighbor Router Id  : 2.2.2.2
         Interface           : Vlanif100
         Immediate Reason    : Neighbor Down Due to Kill Neighbor
         Primary Reason      : Logical Interface State Change
         Down Time           : 2012-09-14 17:17:7

Table 7-49 Description of the display ospf peer last-nbr-down command output

Item	Description
Neighbor Ip Address	Address of the neighboring interface.
Neighbor Area Id	Area to which the neighbor belongs.
Neighbor Router Id	Router ID of the neighbor.
Interface	Interface that connects to the neighbor.
Immediate Reason	Immediate reason that the neighbor went Down: Neighbor Down Due to Inactivity: indicates that the inactivity timer times out. Neighbor Down Due to LL Down: indicates that the link is Down. For example, the interface went Down from Up or the IP address of the link is deleted. Neighbor Down Due to Kill Neighbor: indicates that the kill neighbor event is generated on the neighbor state machine. Neighbor Down Due to 1-Wayhello: indicates that the neighbor went Down because it receives a 1-way packet. Received: indicates that the AdjOK? event is generated on this interface. Neighbor Down Due to SequenceNum Mismatch: indicates that the SequenceNum Mismatch event is generated on the neighbor state machine. Neighbor Down Due to BadLSreq: indicates that the BadLSreq event is generated on the neighbor state machine.
Primary Reason	Primary reason that the neighbor went Down: Hello Not Seen: indicates that no Hello packet is received. Interface Parameter Mismatch: indicates that the parameters set on both ends of the link do not match. Logical Interface State Change: indicates that the status of the logical interface changes. Physical Interface State Change: indicates that the status of the physical interface changes. OSPF Process Reset: indicates that the OSPF process restarts. Area reset: indicates that the area restarts because the area type changes. Area Option Mis-match: indicates that the area options of the interfaces on both ends of the link do not match. Vlink Peer Not Reachable: indicates that the neighbor on the virtual link is not reachable. Sham-Link Unreachable: indicates that the neighbor on the sham link is not reachable. Undo Network Command: indicates that the network command is deleted. Undo NBMA Peer: indicates that the neighbor configuration on the NBMA interface is deleted. Passive Interface Down: indicates that the neighbor relationship went Down because the silent-interface command is configured on the local interface. Opaque Capability Enabled: indicates that Opaque capability is enabled. Opaque Capability Disabled: indicates that Opaque capability is disabled. Virtual Interface State Change: indicates that the status of a virtual link interface changes. BFD Session Down: indicates that the BFD session went Down. Down Retransmission Limit Exceed: indicates that the number of retransmission times reaches the limit. 1-Wayhello Received: indicates that the device receives 1-way hello packets. Router State Change from DR or BDR to DROTHER: indicates that the interface state machine changes to DROTHER from DR or BDR. Neighbor State Change from DR or BDR to DROTHER: indicates that the neighbor state machine changes to DROTHER from DR or BDR. NSSA Area Configure Change: indicates that the configuration of the NSSA area changes. Stub Area Configure Change: indicates that the configuration of the Stub area changes. Received Invalid DD Packet: indicates that invalid DD packets are received. Not Received DD during RouterDeadInterval: indicates that no DD packet is received during the time when the Dead timer starts. M,I,MS bit or SequenceNum Incorrect: indicates that the M, I, and MS bits do not comply with specifications in the protocol. Unable Opaque Capability,Find 9,10,11 Type Lsa: indicates that Type9, Type10, and Type11 LSAs are received and Opaque capability is disabled. Not NSSA,Find 7 Type Lsa in Summary List: indicates that this area is not an NSSA area and Type7 LSAs are found in the summary table. LSrequest Packet,Unknown Reason: indicates that LSR packets are received with the reason unknown. NSSA or STUB Area,Find 5 ,11 Type Lsa: indicates that this area is an NSSA or Stub area and Type5 and Type11 LSAs are found. LSrequest Packet,Request Lsa is Not in the Lsdb: indicates that the neighbor sends an LSR to this process or area to request an LSA and this LSA does not exist in the LSDB of this process. LSrequest Packet, exist same lsa in the Lsdb: indicates that this process receives an LSA that is same as that in the LSDB and the LSA is found in the request list of the neighbor. LSrequest Packet, exist newer lsa in the Lsdb: indicates that this process receives a new LSA that exists in the local LSDB and the LSA is found in the request list of the neighbor. Neighbor state was not full when LSDB overflow: indicates that the LSDB overflows and the neighbor state machine is not Full. Filter LSA configuration change: indicates that the configuration of LSA filter changes. ACL changed for Filter LSA: indicates that the ACL configuration of LSA filter changes. Reset Ospf Peer: indicates that the OSPF neighbor is restarted.
Down Time	Time when the neighbor went Down.

Related Topics

peer (OSPF)

display ospf request-queue

Function

The display ospf request-queue command displays the OSPF request list.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] request-queue [ interface-type interface-number ] [ neighbor-id ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies the interface type and number.	-
neighbor-id	Specifies the neighbor's router ID.	The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output helps you troubleshoot OSPF faults.

Example

# Display the OSPF request list.

<HUAWEI> display ospf request-queue

 OSPF Process 1 with Router ID 10.1.1.1

 OSPF Request List

  The Router's Neighbor is Router ID 10.4.4.4         Address 172.16.4.2

  Interface 172.16.4.1        Area 0.0.0.2

  Request list:

       Type       LinkState ID      AdvRouter         Sequence   Age

       Router     10.1.1.1           10.1.1.1         8000001b   677

Table 7-50 Description of the display ospf request-queue command output

Item	Description
The Router's Neighbor is Router ID	Router ID of the neighbor.
Address	IP address of the neighboring interface.
Interface	IP address of the interface.
Area	Area to which the local device belongs.
Request list	Request list.
Type	LSA type: Router LSA, network LSA, network summary LSA, ASBR summary LSA, AS external LSA, NSSA LSA, and opaque LSA
LinkState ID	Link state ID in the LSA header.
AdvRouter	Advertising router in the LSA header.
Sequence	Sequence number in the LSA header.
Age	Aging time in the LSA header.

display ospf retrans-queue

Function

The display ospf retrans-queue command displays the OSPF retransmission list.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] retrans-queue [ interface-type interface-number ] [ neighbor-id ] [ low-level-of-retrans-times-range min-time ] [ high-level-of-retrans-times-range max-time ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies the interface type and number.	-
neighbor-id	Specifies the neighbor's router ID.	It is in dotted decimal notation.
low-level-of-retrans-times-range min-time	Specifies the minimum number of allowed LSA retransmission.	The value is an integer ranging from 0 to 65535.
high-level-of-retrans-times-range max-time	Specifies the maximum number of allowed LSA retransmission.	The value is an integer ranging from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output helps you troubleshoot OSPF faults.

Example

# Display the OSPF retransmission list.

<HUAWEI> display ospf retrans-queue

                                                                                
         OSPF Process 1 with Router ID 10.1.1.1                           
                 OSPF Retransmit List                                           
                                                                                
  The Router's Neighbor is Router ID 10.2.2.2  Address 192.168.0.2        
  Interface 192.168.0.1      Area 0.0.0.0                                       
  Retransmit list:                                                              
       Type       LinkState ID      AdvRouter         Sequence   Age            
       Router     10.1.1.1          10.1.1.1          80000002   533

Table 7-51 Description of the display ospf retrans-queue command output

Item	Description
The Router's Neighbor	Basic information about the neighboring switch.
Router ID	Router ID of the neighbor.
Address	IP address of the neighboring interface.
Interface	IP address of the interface.
Area	Area ID.
Retransmit List	Retransmission list.
Type	LSA type: Router LSA, network LSA, network summary LSA, ASBR summary LSA, AS external LSA, NSSA LSA, and opaque LSA
LinkState ID	Link state ID in the LSA header.
AdvRouter	Advertising router in the LSA header.
Sequence	Sequence number in the LSA header.
Age	Aging time in the LSA header.

display ospf routing

Function

The display ospf routing command displays an OSPF routing table.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] routing router-id [ router-id ]

display ospf [ process-id ] routing [ ip-address [ mask | mask-length ] ] [ interface interface-type interface-number ] [ nexthop nexthop-address ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
router-id router-id	Specifies the router ID of a destination router.	The value is in dotted decimal notation.
ip-address	Specifies an IP address.	The value is in dotted decimal notation.
mask	Specifies a subnet mask.	The value is in dotted decimal notation.
mask-length	Specifies the mask length.	The value is an integer ranging from 0 to 32.
interface interface-type interface-number	Specifies the type and number of an interface.	-
nexthop nexthop-address	Displays the route with a specified next hop IP address.	The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

By using this command with different parameters, you can view the routes of a specified interface or next hop.

The command output helps you troubleshoot OSPF faults.

Example

# Display the OSPF routing table.

<HUAWEI> display ospf routing

         OSPF Process 1 with Router ID 10.2.2.9                                
                  Routing Tables                                                
                                                                                
 Routing for Network                                                            
 Destination        Cost  Type       NextHop         AdvRouter       Area       
 10.12.12.0/24      1     Transit    10.12.12.10     10.2.2.9        0.0.0.1    
 10.13.13.0/24      1     Stub       10.13.13.1      10.2.2.9        0.0.0.0    
 10.11.11.0/24      2     Transit    10.12.12.11     10.0.0.1        0.0.0.1    

 Routing for ASEs
 Destination        Cost      Type       Tag      NextHop         AdvRouter
 10.0.0.0/8         1         Type2      1        10.12.12.11     10.0.0.1
 
 Total Nets: 4
 Intra Area: 3  Inter Area: 0  ASE: 1  NSSA: 0

Table 7-52 Description of the display ospf routing command output

Item	Description
Destination	Destination network.
Cost	Cost of the route to the destination address.
Type	Type of the destination network: Inter-area: indicates inter-area routes. Intra-area: indicates intra-area routes. Stub: indicates the routes advertised by router LSAs, which correspond to the direct routes of non-broadcast and non-NBMA networks. Transit: indicates the routes advertised by network LSAs.
NextHop	Next hop address to the destination address.
AdvRouter	Device that advertises LSAs.
Area	Area ID.
Tag	Tag of the external route.
Total Nets	Total number of networks in an area, between areas, in ASE areas, and in NSSAs.
Intra Area	Total number of intra-area networks (that is, stub networks and transit networks).
Inter Area	Total number of inter-area networks.
ASE	Total number of networks in the ASE area.
NSSA	Total number of networks in the NSSA.

Related Topics

filter import (OSPF Area)

display ospf sham-link

Function

The display ospf sham-link command displays the sham links of an OSPF area.

If no OSPF process ID or area ID is specified, all sham links are displayed.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

display ospf [ process-id ] sham-link [ area area-id ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
area area-id	Specifies the ID of an OSPF area.	The value is an integer ranging from 0 to 4294967295 or in the IPv4 address format.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display ospf sham-link command to check information about the sham links of an OSPF area. The information helps determine the establishment of sham links.

Example

# Display all OSPF sham links.

<HUAWEI> display ospf sham-link

           OSPF Process 100 with Router ID 10.1.1.2
 Sham Link:
 Area       NeighborId     Source-IP     Destination-IP   State   Cost
 0.0.0.1    10.1.1.2       10.3.3.3      10.5.5.5         P-2-P   10

# Display the OSPF sham link of Area 1.

<HUAWEI> display ospf sham-link area 1

          OSPF Process 100 with Router ID 10.1.1.2
  Sham-Link: 10.3.3.3 --> 10.5.5.5
  Neighbor ID: 10.1.1.2,    State: Full
  Area: 0.0.0.1
  Cost: 10  State: P-2-P, Type: Sham
  Timers: Hello 10 , Dead 40 , Retransmit 5 , Transmit Delay 1

Table 7-53 Description of the display ospf sham-link command output

Item	Description
Area	OSPF area that the sham link belongs to.
NeighborId	Neighbor ID of the switch.
Source-IP	Source IP address of the sham link.
Destination-IP	Destination IP address of the sham link.
State	Interface status of the sham link. P-2-P indicates the point-to-point link.
Cost	Cost of the sham link.
Type	Connection type.
Timers	Information about the following items: the interval for sending Hello messages, Dead time, retransmission interval, and transmission delay on the interface.

display ospf spf-statistics

Function

The display ospf spf-statistics command displays route calculation statistics in OSPF processes.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] spf-statistics [ verbose ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, brief information about route calculation statistics in all processes is displayed.	The value is an integer ranging from 1 to 65535.
verbose	Displays detailed information about route calculation statistics.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display ospf spf-statistics command displays route calculation statistics in OSPF processes, including the time when route calculation occurs, cause of route calculation, and number of changed routes.

When identifying the cause of OSPF route flapping, you can run this command to obtain OSPF route calculation statistics, and then identify the cause according to the command output.

Example

# Display brief information about route calculation statistics in OSPF process 1.

<HUAWEI> display ospf 1 spf-statistics

           OSPF Process 1 with Router ID 10.2.2.2
Routing table change statistics:
Date          Time            Intra       Inter    External    Reason
2008-08-14    10:17:16        17          17       17          LSA
2008-08-14    09:16:47        77          62       127         Other
2008-08-14    08:16:37        0           0        0           LSA
2008-08-14    07:04:40        24          230      108         LSA
2008-08-14    06:03:15        204         230      18          Other
2008-08-14    05:02:55        34          236      128         LSA
2008-08-14    04:01:49        54          130      158         LSA
2008-08-14    03:01:48        44          220      138         LSA
2008-08-14    02:01:43        22          233      158         LSA
2008-08-14    01:00:53        977         897      907         LSA

Table 7-54 Description of the display ospf spf-statistics command output

Item	Description
Date	Date when route calculation occurs.
Time	Time when route calculation occurs.
Intra	Number of intra-area routes in the routing table, which are changed because of route calculation.
Inter	Number of inter-area routes in the routing table, which are changed because of route calculation.
External	Number of external routes in the routing table, which are changed because of route calculation.
Reason	Cause of route calculation: LSA: indicates that route calculation is caused by LSAs. Other: indicates that route calculation is caused by other causes. For example, the configuration changes; or the interface goes Down.

# Display detailed information about route calculation statistics in OSPF process 1.

<HUAWEI> display ospf 1 spf-statistics verbose

           OSPF Process 1 with Router ID 10.10.10.2
Routing table change statistics:
Index: 1   
           Time     : 2008-11-29,17:36:59
           Intra    : 0 Added,0 Deleted, 0 Modified
           Inter    : 0 Added,0 Deleted, 0 Modified
           External : 10 Added,0 Deleted, 0 Modified
           The reason of calculation is:LSA
           NO.     Type          LS ID             Adv Router
           1       External      10.1.5.0          10.10.10.1
           2       External      10.1.3.0          10.10.10.1
           3       External      10.1.9.0          10.10.10.1
           4       External      10.1.4.0          10.10.10.1
           5       External      10.1.2.0          10.10.10.1
           6       External      10.1.8.0          10.10.10.1
           7       External      10.1.7.0          10.10.10.1
           8       External      10.1.6.0          10.10.10.1
           9       External      10.1.10.0         10.10.10.1
           10      External      10.1.1.0          10.10.10.1

Table 7-55 Description of the display ospf spf-statistics verbose command output

Item	Description
Time	Date and time when route calculation occurs.
Intra	Number of intra-area routes in the routing table, which are added and deleted because of route calculation.
Inter	Number of inter-area routes in the routing table, which are added and deleted because of route calculation.
External	Number of external routes in the routing table, which are added and deleted because of route calculation.
The reason of calculation is	Cause of route calculation: LSA: indicates that route calculation is caused by LSAs. Other: indicates that route calculation is caused by other causes. For example, the configuration changes; or the interface goes Down.
No.	Sequence number of the LSA that causes route calculation, which ranges from 1 to 10.
Type	Type of the LSA that causes route calculation, including Router, Network, Sum-Net, External, and NSSA.
LS ID	Link state ID of the LSA that causes route calculation.
Adv Router	Router ID of the switch that generates the LSA that causes route calculation.

display ospf statistics updated-lsa

Function

The display ospf statistics updated-lsa command displays the frequent updates of the LSAs that the LSDB receives.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

display ospf [ process-id ] statistics updated-lsa [ originate-router advertising-router-id | history ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If no OSPF process ID is specified, this command displays brief information about the route calculation statistics in all processes.	The value is an integer ranging from 1 to 65535.
originate-router	Specifies the link status of the advertising switch.	-
advertising-router-id	Specifies the ID of the advertising switch.	The value is in dotted decimal notation
history	Specifies the update history of LSAs that the LSDB receives.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display ospf statistics updated-lsa command displays the frequent updates of LSAs, facilitating the location of the cause for a routing flapping.

If the history parameter is not configured, the display ospf statistics updated-lsa command only displays the updates of LSAs within the latest hour.
If the history parameter is configured, the display ospf statistics updated-lsa command displays the update history of LSAs within the last 24 hours.

Precautions

If you run the reset ospf command to restart the OSPF process, the real-time and historical statistics on the process will be cleared.
The display ospf statistics updated-lsa command is used only to display the frequent updates of LSAs. The updated LSAs are compared with the LSAs in the local LSDB, and those with the age greater than 900 will not be displayed except those with the age of 3600.

Example

# Display the LSA updates within the last one hour.

<HUAWEI> display ospf statistics updated-lsa

          OSPF Process 1 with Router ID 10.1.1.1
               Statistics of Received LSAs

 Begin time: 2011-04-25 11:37:32

 AdvRouter           Total        Updated at
 10.1.1.1            18           11:37:40/2011/04/25
 10.2.2.2            5            11:37:40/2011/04/25
 10.3.3.3            5            11:37:41/2011/04/25
 10.4.4.4            5            11:37:41/2011/04/25
 10.5.5.5            2            11:37:40/2011/04/25
 10.6.6.6            3            11:37:40/2011/04/25
 10.7.7.7            5            11:37:40/2011/04/25
 10.8.8.8            6            11:37:41/2011/04/25

Table 7-56 Description of the display ospf statistics updated-lsa command output

Item	Description
Begin time	Start time of collecting statistics.
AdvRouter	Advertising switch.
Total	Total update times of LSAs.
Updated at	Latest update time.

# Display the LSA updates of the specified advertising switch.

<HUAWEI> display ospf statistics updated-lsa originate-router 10.1.1.1

          OSPF Process 1 with Router ID 10.2.2.2
               Statistics of Received LSAs

 Begin time: 2011-04-25 11:37:32

 AdvRouter      : 10.1.1.1
 Total          : 6                 Updated at      : 2011-04-25 11:37:41
 Router(1)      : 3                 Network(2)      : 2
 Summary-Net(3) : 0                 Summary-Asbr(4) : 0
 External(5)    : 1                 NSSA(7)         : 0
 Opaque-link(9) : 0                 Opaque-area(10) : 0
 Opaque-AS(11)  : 0

Table 7-57 Description of the display ospf statistics updated-lsa originate-router command output

Item	Description
Router(1)	Update times of Router LSAs.
Network(2)	Update times of Network LSAs.
Summary-Net(3)	Update times of Network Summary LSAs.
Summary-Asbr(4)	Update times of ASBR Summary LSAs.
External(5)	Update times of AS External LSAs.
nssa(7)	Update times of Type7 LSAs.
Opaque-link(9)	Update times of Type9 LSAs.
Opaque-area(10)	Update times of Type10 LSAs.
Opaque-AS(11)	Update times of Type11 LSAs.

# Display the update history of LSAs.

<HUAWEI> display ospf statistics updated-lsa history

          OSPF Process 1 with Router ID 10.1.1.1
          History Information for Received LSAs

 Record  1:
 Begin time: 2011-04-25 11:39:32
 End   time: 2011-04-25 11:41:32

 no Record

 Record  2:
 Begin time: 2011-04-25 11:37:32
 End   time: 2011-04-25 11:39:32

 AdvRouter      : 10.1.1.1          Total           : 18
 Router(1)      : 0                 Network(2)      : 0
 Summary-Net(3) : 0                 Summary-Asbr(4) : 18
 External(5)    : 0                 NSSA(7)         : 0
 Opaque-link(9) : 0                 Opaque-area(10) : 0
 Opaque-AS(11)  : 0 

 AdvRouter      : 10.2.2.2          Total           : 5
 Router(1)      : 3                 Network(2)      : 2
 Summary-Net(3) : 0                 Summary-Asbr(4) : 0
 External(5)    : 0                 NSSA(7)         : 0
 Opaque-link(9) : 0                 Opaque-area(10) : 0
 Opaque-AS(11)  : 0 

 AdvRouter      : 10.3.3.3          Total           : 5
 Router(1)      : 3                 Network(2)      : 2
 Summary-Net(3) : 0                 Summary-Asbr(4) : 0
 External(5)    : 0                 NSSA(7)         : 0
 Opaque-link(9) : 0                 Opaque-area(10) : 0
 Opaque-AS(11)  : 0 

 AdvRouter      : 10.4.4.4          Total           : 5
 Router(1)      : 2                 Network(2)      : 2
 Summary-Net(3) : 0                 Summary-Asbr(4) : 0
 External(5)    : 1                 NSSA(7)         : 0
 Opaque-link(9) : 0                 Opaque-area(10) : 0
 Opaque-AS(11)  : 0

Table 7-58 Description of the display ospf statistics updated-lsa history command output

Item	Description
Record	Record number.
End time	End time of collecting statistics.

display ospf vlink

Function

The display ospf vlink command displays OSPF virtual links.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display ospf [ process-id ] vlink

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output helps you troubleshoot OSPF faults.

Example

# Display OSPF virtual links.

<HUAWEI> display ospf vlink

          OSPF Process 1 with Router ID 10.1.1.1

                  Virtual Links

 Virtual-link Neighbor-id  -> 10.2.2.2, Neighbor-State: Full

 Interface: 10.1.1.1 (Vlanif10)

 Cost: 1  State: P-2-P  Type: Virtual

 Transit Area: 0.0.0.1

 Timers: Hello 10 , Dead 40 , Retransmit 5 , Transmit Delay 1

 GR State: Normal

Table 7-59 Description of the display ospf vlink command output

Item	Description
Virtual-link Neighbor-id	ID of the neighboring switch that is connected through the virtual link.
Neighbor-State	Neighbor status, such as Down, Init, 2-Way, ExStart, Exchange, Loading, and Full.
Interface	Information about interfaces in the area, that is, IP address and name of the primary interface (If the interface is a serial interface, Unknown is displayed.)
Cost	Cost.
State	Interface status.
Type	Interface type.
Transit Area	Transit area ID if the current interface is a virtual link.
Timers	Information about the following items: the interval for sending Hello messages, Dead time, retransmission interval, and transmission delay on the interface.
GR State	GR status: Normal: indicates that a switch is in the Normal state and does not perform GR. Doing GR: indicates that a switch is performing GR. Complete GR: indicates that a switch finishes GR. Helper: indicates that the neighbor is the Helper when a switch is performing GR.

Related Topics

vlink-peer (OSPF area)

display snmp-agent trap feature-name ospf all

Function

The display snmp-agent trap feature-name ospf all command displays all trap messages of the OSPF module.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

display snmp-agent trap feature-name ospf all

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The Simple Network Management Protocol (SNMP) is a standard network management protocol widely used on TCP/IP networks. It uses a central computer (a network management station) that runs network management software to manage network elements. The management agent on the network element automatically reports traps to the network management station. After that, the network administrator immediately takes measures to resolve the problem.

The display snmp-agent trap feature-name ospf all command displays whether all trap functions of the OSPF module are enabled.

Example

# Display all trap messages of the OSPF module.

<HUAWEI> display snmp-agent trap feature-name ospf all

------------------------------------------------------------------------------  
Feature name: OSPF                                                              
Trap number : 22                                                                
------------------------------------------------------------------------------  
Trap name                             Default switch status   Current switch status   
ospfIfStateChange                     off                     off                     
ospfVirtIfStateChange                 off                     off                     
ospfNbrStateChange                    off                     off                     
ospfVirtNbrStateChange                off                     off                     
ospfIfAuthFailure                     off                     off                     
ospfVirtIfAuthFailure                 off                     off                     
ospfIfRxBadPacket                     off                     off                     
ospfVirtIfRxBadPacket                 off                     off                     
ospfLsdbOverflow                      off                     off                     
ospfLsdbApproachingOverflow           off                     off                     
ospfRestartStatusChange               off                     off                     
ospfNbrRestartHelperStatusChange      off                     off                     
ospfVirtNbrRestartHelperStatusChange  off                     off                     
ospfNssaTranslatorStatusChange        off                     off                     
ospfIfConfigError                     off                     off                     
ospfVirtIfConfigError                 off                     off                     
ospfTxRetransmit                      off                     off                     
ospfVirtIfTxRetransmit                off                     off                     
ospfOriginateLsa                      off                     off                     
ospfMaxAgeLsa                         off                     off                     
hwOspfv2IntraAreaRouteridConflict     on                      on                      
hwOspfv2IntraAreaDRIpAddressConflict  on                      on 
hwOspfv2IntraAreaRouterIdConflictRecovered  on                      on
hwOspfv2PeerFlappingSuppressStatusChange    off                     off

Table 7-60 Description of the display snmp-agent trap feature-name ospf all command output

Item	Description
Feature name	Name of the feature
Trap number	Number of traps
Trap name	Name of the trap: ospfIfStateChange: It is sent when the interface status changes. ospfVirtIfStateChange: It is sent when the status of the interface on the virtual link changes. ospfNbrStateChange: It is sent when the neighbor status changes. ospfVirtNbrStateChange: It is sent when the status of the neighbor on the virtual link changes. ospfIfAuthFailure: It is sent when interface authentication fails. ospfVirtIfAuthFailure: It is sent when the authentication of the interface on the virtual link fails. ospfIfRxBadPacket: It is sent when a bad packet is received on the interface. ospfVirtIfRxBadPacket: It is sent when a bad packet is received on the interface on the virtual link. ospfLsdbOverflow: It is sent when the LSDB overflows. ospfLsdbApproachingOverflow: It is sent when the LSDB is about to overflow. ospfRestartStatusChange: It is sent when the GR Restarter status changes. ospfNbrRestartHelperStatusChange: It is sent when the GR Helper status changes. ospfVirtNbrRestartHelperStatusChange: It is sent when the GR Helper status of the neighbor on the virtual link changes. ospfNssaTranslatorStatusChange: It is sent when the status of the NSSA device that translates Type 7 LSAs into Type 5 LSAs changes. ospfIfConfigError: It is sent when the interface configuration is incorrect. ospfVirtIfConfigError: It is sent when the configuration of the interface on the virtual link is incorrect. ospfTxRetransmit: It is sent when packets are retransmitted. ospfVirtIfTxRetransmit: It is sent when packets are retransmitted on the interface on the virtual link. ospfOriginateLsa: It is sent when local LSAs are generated. ospfMaxAgeLsa: It is sent when Max Age LSAs are generated. hwOspfv2IntraAreaDRIpAddressConflict: It is sent when ip addresses of DRs in an intra area conflict. hwOspfv2IntraAreaRouteridConflict: It is sent when router ID conflict was detected in an intra area. hwOspfv2IntraAreaRouterIdConflictRecovered: The OSPF router ID conflict is resolved. hwOspfv2PeerFlappingSuppressStatusChange: The status of OSPF neighbor relationship flapping suppression changed.
Default switch status	Status of the default trap switch: on: indicates that the trap function is enabled. off: indicates that the trap function is disabled.
Current switch status	Status of the current trap switch: on: indicates that the trap function is enabled. off: indicates that the trap function is disabled.

dn-bit-set

Function

The dn-bit-set disable command disables OSPF from setting the DN bit in LSAs.

The undo dn-bit-set disable command enables OSPF to set the DN bit in LSAs.

By default, OSPF is enabled to set the DN bit in LSAs.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

dn-bit-set disable { summary | ase | nssa }

undo dn-bit-set disable { summary | ase | nssa }

Parameters

Parameter	Description	Value
summary	Specifies that the DN bit is not set in summary LSAs.	-
ase	Specifies that the DN bit is not set in ASE LSAs.	-
nssa	Specifies that the DN bit is not set in NSSA LSAs.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The dn-bit-set disable command can be used in the following scenarios:

In the VPN option A scenario, the local PE imports BGP routes to generate LSAs and advertise the generated LSAs to the peer PE. According to RFC 4577, setting of the DN bit is restricted. The peer PE may fail to calculate a route. In this situation, the dn-bit-set disable command can be used to set the DN bit on or remove the setting of the DN bit from the local PE.
When a PE is connected to an MCE, the MCE needs to calculate routes advertised by the PE. By default, the MCE does not check the DN bit. In this situation, the dn-bit-set disable command can be used to set the DN bit on or remove the setting of the DN bit from the local PE.

To prevent routing loops, the OSPF multi-instance process uses a bit as a flag. The bit is called DN bit.

Configuration Impact

When the dn-bit-set disable command is used to disable OSPF from setting the DN bit in LSAs, routing loops may occur. If the parameter ase or nssa is specified, the DN bit in ASE LSAs or NSSA LSAs is not set. You can use the route-tag command to set the same tag value to prevent routing loops. Therefore, it is recommended that the dn-bit-set disable command be used in only the scenarios specified in Usage Scenario.

If the dn-bit-set disable ase command is configured, the DN bit is not set in type 5 LSAs that are converted from type 7 LSAs even if the DN bit is set in type 7 LSAs.

Precautions

The dn-bit-set disable command can be configured for only private OSPF processes. The configuration of this command takes effect only on the PEs.

The dn-bit-check disable command can be used to control whether OSPF running on the peer PE checks the DN bit when calculating routes.

Example

# Disable OSPF from setting the DN bit in ASE LSAs.

<HUAWEI> system-view

[HUAWEI] ip vpn-instance huawei

[HUAWEI-vpn-instance-huawei] route-distinguisher 100:1

[HUAWEI-vpn-instance-huawei-af-ipv4] quit

[HUAWEI-vpn-instance-huawei] quit

[HUAWEI] ospf 100 vpn-instance huawei

[HUAWEI-ospf-100] dn-bit-set disable ase

Related Topics

route-tag

dn-bit-check

Function

The dn-bit-check disable command disables OSPF from checking the DN bit in LSAs.

The undo dn-bit-check disable command enables OSPF to check the DN bit in LSAs.

By default, OSPF is enabled to check the DN bit in LSAs.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

dn-bit-check disable { summary [ router-id router-id ] | ase | nssa }

undo dn-bit-check disable { summary [ router-id router-id ] | ase | nssa }

Parameters

Parameter	Description	Value
summary	Specifies that the DN bit in summary LSAs is not checked.	-
router-id router-id	Specifies the ID of a device on which the DN bit in summary LSAs is checked.	-
ase	Specifies that the DN bit in ASE LSAs is not checked.	-
nssa	Specifies that the DN bit in NSSA LSAs is not checked.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

In the VPN option A scenario, the local PE imports BGP routes to generate LSAs and advertise the generated LSAs to the peer PE. According to RFC 4577, setting of the DN bit is restricted. The peer PE may fail to calculate a route. In this situation, you need to use the dn-bit-check disable command to disable OSPF from checking the DN bit in LSAs.

To prevent routing loops, the OSPF multi-instance process uses a bit as a flag. The bit is called DN bit.

Configuration Impact

When the dn-bit-check disable command is run, routing loops may occur. If the parameter ase or nssa is specified, the DN bit in ASE LSAs or NSSA LSAs is not checked. You can use the route-tag command to set the same tag value to prevent routing loops. Therefore, run the dn-bit-check disable command only in the scenario specified in Usage Scenario.

Precautions

When a PE is connected to an MCE, the MCE does not check the DN bit by default.

The dn-bit-check disable command can be configured only for private OSPF processes. The configuration of this command takes effect only on the PEs.

In this scenario, you can run the dn-bit-set disable command to set the DN bit on or remove the setting of the DN bit from the local PE.

Example

# Disable OSPF from checking the DN bit in summary LSAs.

<HUAWEI> system-view

[HUAWEI] ip vpn-instance huawei

[HUAWEI-vpn-instance-huawei] route-distinguisher 100:1

[HUAWEI-vpn-instance-huawei-af-ipv4] quit

[HUAWEI-vpn-instance-huawei] quit

[HUAWEI] ospf 100 vpn-instance huawei

[HUAWEI-ospf-100] dn-bit-check disable summary router-id 10.1.1.1

Related Topics

route-tag

dn-bit-set

domain-id (OSPF)

Function

The domain-id command sets an ID for an OSPF domain.

The undo domain-id command restores the default setting.

By default, the domain ID is null.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

domain-id { null | domain-id [ type type value value | secondary ] ^* }

undo domain-id [ domain-id [ type type value value ] ]

Parameters

Parameter	Description	Value
domain-id	Specifies the ID of an OSPF domain.	The value can be an integer or in dotted decimal notation. If it is an integer, the value ranges from 0 to 4294967295, and it is converted to dotted decimal notation when the ID is displayed. If it is in dotted decimal notation, it is displayed as entered.
null	Indicates that the OSPF domain ID is null.	-
type type	Specifies the type of the OSPF domain ID.	It can be 0005, 0105, 0205, or 8005. By default, it is 0005.
value value	Specifies the value of the type of the OSPF domain ID.	The value is a hexadecimal number that ranges from 0x0 to 0xffff, and the default value is 0x0.
secondary	Indicates the ID of a secondary domain.	The maximum number of domain-id secondary in each OSPF process is 1000.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Domain IDs are used to identify domains.

If the local OSPF area and an OSPF area of a remote VPN attempts to exchange Type 3 LSAs, the two areas must be in the same OSPF domain. You can run the domain-id command to configure the same domain ID for the two OSPF areas.

The routes that are imported from a PE switch are advertised using External-LSAs. The routes destined for different nodes in the same OSPF domain are advertised based on Type 3 LSAs. This requires that the nodes in the same OSPF domain be configured with the same domain ID.

If the undo domain-id command without any parameter is executed, the primary domain ID will be deleted.

OSPF direct routes to the PE do not carry the domain ID, while BGP direct routes to the PE carry the domain ID.

Configuration Impact

Before sending routes to a remote CE switch, a PE switch sends Type 3 LSAs or Type 5 LSAs to the CE based on domain ID. If local domain IDs are the same as or compatible with remote domain IDs in BGP routes, the PE advertises Type 3 routes. If local domain IDs are different from or incompatible with remote domain IDs in BGP routes, the PE advertises Type 5 routes.

Precautions

Each OSPF domain has one or multiple domain IDs. One of them is a primary ID and the others are secondary IDs.
If an OSPF instance does not have a specific domain ID, its ID is considered as null.
If the value of the domain ID is 0, secondary cannot be configured.
The maximum number of domain-id secondary items configured in an OSPF process is 1000.
The domain-id command is forbidden in public networks.

Example

# Set an OSPF domain ID.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] domain-id 234

eca-route-type compatible

Function

The eca-route-type compatible command sets the route type of the extended community attribute of OSPF VPN to 0x8000.

The undo eca-route-type compatible command restores the route type of the extended community attribute of OSPF VPN to 0x0306.

By default, the route type of the extended community attribute of OSPF VPN is 0x0306.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

eca-route-type compatible

undo eca-route-type compatible

Parameters

None

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The eca-route-type compatible command is used in OSPF VPN scenarios.

For the switch supporting RFC 4577, you can set the route type of the extended community attribute of OSPF VPN to 0x0306 and configure the switch to identify both 0x0306 and 0x8000 route types.
For the switch that does not support RFC 4577, you can set the route type of the extended community attribute of OSPF VPN to 0x8000 and configure the switch to identify only the 0x8000 route type.

The eca-route-type compatible command enables different switchs to communicate with each other and avoid the failure in parsing the route type because the route type of the extended community attribute of OSPF VPN is unrecognized.

Precautions

The eca-route-type compatible command is forbidden in public network.

Example

# Set the route type of the extended community attribute of OSPF VPN to 0x8000.

<HUAWEI> system-view

[HUAWEI] ip vpn-instance huawei

[HUAWEI-vpn-instance-huawei] route-distinguisher 100:1

[HUAWEI-vpn-instance-huawei-af-ipv4] quit

[HUAWEI-vpn-instance-huawei] quit

[HUAWEI] ospf 1 vpn-instance huawei

[HUAWEI-ospf-1] eca-route-type compatible

enable log

Function

The enable log command enables the logging function.

The undo enable log command disables the logging function.

By default, the logging function is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

enable log [ config | error | state | snmp-trap ]

undo enable log [ config | error | state | snmp-trap ]

Parameters

Parameter	Description	Value
config	Enables the configuration log.	-
state	Enables the state log.	-
error	Enables the error log.	-
snmp-trap	Enables the SNMP trap log.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Running the enable log command can enable the logging function. You can view running status of devices based on logs, facilitating device maintenance.

If the undo enable log command is executed, the logging function will be disabled. Then, running status of devices will be not displayed. This is inconvenient for network maintenance.

Precautions

Configuring different parameters in the enable log command can display different log information. If no parameter is not specified, the command output displays all log information.

Example

# Enable the OSPF logging function.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] enable log

filter export (OSPF Area)

Function

The filter export command filters the outgoing Type3 LSAs of the local area.

The undo filter export command restores the default setting.

By default, the outgoing Type3 LSAs of the local area are not filtered.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

filter { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export

undo filter [ acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name ] export

Parameters

Parameter	Description	Value
acl-number	Specifies the number of a basic ACL.	The value is an integer ranging from 2000 to 2999.
acl-name acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
route-policy route-policy-name	Specifies the name of a routing policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The command can be used to filter out invalid LSAs sent to neighbors to reduce the size of the LSDB and speed up network convergence.

Configuration Impact

After filtering conditions are set for the outgoing summary LSAs to be advertised using the filter export command, only the outgoing Type3 LSAs that pass the filtering can be advertised.

Precautions

The command can be configured only on an ABR.
For an ACL, when the rule command is used to configure a filtering rule, the filtering rule takes effective only when the source address range is specified by the source parameter and the time period is specified by the time-range parameter.
Run the filter import command to set filtering conditions for the incoming Type3 LSAs to be advertised.
Creating an ACL before it is referenced is recommended. If a nonexistent ACL is referenced using the command, OSPF advertises all Type 3 LSAs.
Creating an IP prefix list or route-policy before it is referenced is recommended. By default, nonexistent IP prefix lists or route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent IP prefix list or route-policy is referenced using the current command, OSPF advertises all Type 3 LSAs.

Example

# Configure OSPF to filter outgoing Type 3 LSAs.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] area 1

[HUAWEI-ospf-1-area-0.0.0.1] filter 2000 export

Related Topics

acl (system view)

filter import (OSPF Area)

Function

The filter import command filters the incoming Type3 LSAs of the local area.

The undo filter import command restores the default setting.

By default, the incoming Type3 LSAs are not filtered.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

filter { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } import

undo filter [ acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name ] import

Parameters

Parameter	Description	Value
acl-number	Specifies the number of a basic ACL.	The value is an integer ranging from 2000 to 2999.
acl-name acl-name	Specifies the name of an ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
route-policy route-policy-name	Specifies the name of a route-policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After filtering conditions are set for the incoming summary LSAs to be advertised using the filter import command, only the incoming Type3 LSAs that pass the filtering can be received.

Configuration Impact

The command can be used to filter out invalid LSAs sent to neighbors to reduce the size of the LSDB and speed up network convergence.

Precautions

The command can be configured only on an ABR.
For an ACL , when the rule command is used to configure a filtering rule, the filtering rule takes effect only when the source address range is specified by the source parameter and the time period is specified by the time-range parameter.
Run the filter export command to set filtering conditions for the outgoing Type3 LSAs to be advertised.
Creating an ACL before it is referenced is recommended. If a nonexistent ACL is referenced using the command, OSPF receives all Type 3 LSAs.
Creating an IP prefix list or route-policy before it is referenced is recommended. By default, nonexistent IP prefix lists or route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent IP prefix list or route-policy is referenced using the current command, OSPF receives all Type 3 LSAs.

Creating a route-policy before it is referenced is recommended. By default, nonexistent route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent route-policy is referenced using the current command, all the routes learned by the specified protocol are imported to the OSPF routing table.

Example

# Configure an ABR to filter incoming Type 3 LSAs of the area where the ABR resides.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 1

[HUAWEI-ospf-100-area-0.0.0.1] filter ip-prefix my-prefix-list import

Related Topics

acl (system view)

filter export (OSPF Area)

filter-lsa-out peer

Function

The filter-lsa-out peer command configures a switch to filter the LSAs that are sent by specified neighbors on a P2MP network.

The undo filter-lsa-out peer command cancels the configuration.

By default, the LSAs that are sent by specified neighbors on a P2MP network are not filtered.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

filter-lsa-out peer ip-address { all | { summary [ acl { acl-number | acl-name } ] | ase [ acl { acl-number | acl-name } ] | nssa [ acl { acl-number | acl-name } ] } ^* }

undo filter-lsa-out peer ip-address

Parameters

Parameter	Description	Value
ip-address	Specifies the IP address of a P2MP neighbor. This parameter is configured by the neighbor using the ip address command.	The value is in dotted decimal notation.
all	Filters all the outgoing LSAs except Grace LSAs.	-
summary	Filters the outgoing network summary LSAs (Type 3).	-
acl acl-number	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ase	Filters the outgoing AS external LSAs (Type 5).	-
nssa	Filters the outgoing NSSA LSAs (Type 7).	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a P2MP network, when multiple P2MP links exist between two devices, you can configure the local device to filter the outgoing LSAs on the specified link. This reduces unnecessary LSA retransmission attempts and saves bandwidth resources.

For an ACL, when the rule command is used to configure filtering rules, only the source address range that is specified by the source parameter and the period of time that is specified by the time-range parameter take effect.

Prerequisites

OSPF does not regard a network as a P2MP network by default regardless of any link layer protocol. A P2MP network is forcibly changed from the network of another type using the ospf network-type p2mp command.

Configuration Impact

This command is valid for all the interfaces of the OSPF process.

Follow-up Procedure

Configure a device to filter the outgoing LSAs on the specified OSPF interface by using the ospf filter-lsa-out command.

Example

# On a P2MP network, configure a switch to filter all the LSAs (except Grace LSAs) sent to neighbor 10.1.1.1.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] filter-lsa-out peer 10.1.1.1 all

Related Topics

ospf filter-lsa-out

filter-policy export (OSPF)

Function

The filter-policy export command filters the imported routes when these routes are advertised based on a filtering policy.

The undo filter-policy export command restores the default setting.

By default, the imported routes to be advertised are not filtered.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } export [ protocol [ process-id ] ]

undo filter-policy [ acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name ] export [ protocol [ process-id ] ]

Parameters

Parameter	Description	Value
acl-number	Specifies the number of a basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl-name acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
route-policy route-policy-name	Specifies the name of a routing policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
protocol process-id	Filters imported routes of a specified protocol. The value can be direct, rip, isis, bgp, ospf, unr, or static. When the routing protocol is RIP, IS-IS, or OSPF, you can specify a process ID.	The value is an integer that ranges from 1 to 65535. The default value is 1.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After OSPF imports external routes using the import-route command, you can use the filter-policy export command to filter the imported routes to be advertised. Only the external routes that pass the filtering can be converted into AS-external LSAs and advertised.

The protocol or process-id parameter can be specified to determine a specified protocol or process. If the protocol or process-id parameter is not specified, OSPF filters all imported routes.

Precautions

This command can be configured only on ASBRs because AS-external-LSAs are generated by ASBRs.
For an ACL, when the rule command is used to configure a filtering rule, the filtering rule takes effective only when the source address range is specified by the source parameter and the time period is specified by the time-range parameter.
Creating an ACL before it is referenced is recommended. If a nonexistent ACL is referenced using the command, all external routes imported to OSPF are converted to Type 5 LSAs (AS-external-LSAs) or Type 7 LSAs (NSSA-external-LSAs) and then are advertised to neighbors.
Creating an IP prefix list or route-policy before it is referenced is recommended. By default, nonexistent IP prefix lists or route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent IP prefix list or route-policy is referenced using the current command, all external routes imported to OSPF are converted to Type 5 LSAs (AS-external-LSAs) or Type 7 LSAs (NSSA-external-LSAs) and then are advertised to neighbors.

Example

# Filter the routes that are imported from RIP and advertised by OSPF based on a filtering policy.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] import-route rip

[HUAWEI-ospf-100] filter-policy 2000 export

Related Topics

acl (system view)

filter-policy import (OSPF)

Function

The filter-policy import command configures a filtering policy to filter routes received by OSPF.

The undo filter-policy import command restores the default setting.

By default, OSPF does not filter received routes.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name [ secondary ] } import

undo filter-policy [ acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name [ secondary ] ] import

Parameters

Parameter	Description	Value
acl-number	Specifies the basic ACL number.	The value is an integer ranging from 2000 to 2999.
acl-name acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ip-prefix ip-prefix-name	Specifies the name of an address prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
route-policy route-policy-name	Specifies the name of the route policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
secondary	Selects a secondary route.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The filter-policy import command is used to set a filtering policy for received routes. Only the routes that pass the filtering can be added to the routing table. The routes that fail to pass the filtering cannot be added to the routing table but can be advertised.

The OSPF routing information is recorded in the LSDB. Instead of filtering the received or sent LSAs, the device filters routes calculated by OSPF using the filter-policy import command.

Precautions

For an ACL configured using the acl command, when the rule command is used to configure a filtering rule, the filtering rule takes effect only when the source address range is specified by the source parameter and the time period is specified by the time-range parameter.

Creating an ACL before it is referenced is recommended. If a nonexistent ACL is referenced using the command, all routes received by OSPF are delivered to the IP routing table.

Creating an IP prefix list or route-policy before it is referenced is recommended. By default, nonexistent IP prefix lists or route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent IP prefix list or route-policy is referenced using the current command, all routes received by OSPF are delivered to the IP routing table.

Example

# Configure OSPF to filter received routes.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] filter-policy 2000 import

flooding-control

Function

The flooding-control command restricts the flooding of updated LSAs.

The undo flooding-control command cancels the restriction on the flooding of updated LSAs.

By default, this function is enabled when the number of neighbors exceeds 256.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

flooding-control [ number transmit-number | timer-interval transmit-interval ] ^*

undo flooding-control [ number | timer-interval ] ^*

Parameters

Parameter	Description	Value
number transmit-number	Sets the number of updated LSAs to be flooded each time.	The value is an integer ranging from 1 to 1000. By default, the value is 50.
timer-interval transmit-interval	Sets the interval for flooding updated LSAs.	The value is an integer that ranges from 30 to 100000, in milliseconds. By default, the value is 30.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When multiple neighbors are configured or a large number of updated LSAs are flooded, a switch may receive a large number of updated LSAs in a short period. If the switch is busy processing these update packets and discards the Hello packets that maintain neighbor relationships, neighbor relationships may be interrupted. During the reestablishment of neighbor relationships, more packets need to be exchanged, which deteriorates the processing of packets.

To avoid the preceding problem, you can run the flooding-control command to restrict the flooding of updated LSAs to keep stable neighbor relationships.

Configuration Impact

After the flooding-control command is run, the flooding of updated LSAs is immediately restricted.

Precautions

By default, a switch spends 50 ms in flooding updated LSAs each time. If not all the updated LSAs are flooded within 50 ms, the switch floods the remaining LSAs after the time specified by transmit-interval.

Example

# Set the number of updated LSAs to be flooded each time to 100.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] flooding-control number 100

frr (OSPF)

Function

The frr command creates and then displays the OSPF FRR view.

The undo frr command deletes the OSPF FRR view.

By default, the OSPF FRR view does not exist.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

frr

undo frr

Parameters

None

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF IP FRR allows devices to fast switch traffic from faulty links to back up links without interrupting traffic. This function protects traffic and greatly improves the reliability of OSPF networks. OSPF IP FRR must be configured in the OSPF FRR view. The frr command run in the OSPF view creates and displays the OSPF FRR view.

Prerequisites

The OSPF function has been enabled using the ospf command.

Follow-up Procedure

The frr command run in the OSPF view creates and displays the OSPF FRR view only, but cannot enable the OSPF IP FRR function. Run the loop-free-alternate command in the OSPF view to enable OSPF IP FRR to create the loop-free backup route.

Example

# Create and display the OSPF FRR view.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] frr

[HUAWEI-ospf-1-frr]

Related Topics

frr-policy route (OSPF)

Function

The frr-policy route command configures a filtering policy for the OSPF IP FRR backup routes. The filtering policy determines what kind of OSPF backup route can be added to the routing table.

The undo frr-policy route command cancels the filtering function.

By default, the filtering function is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

frr-policy route route-policy route-policy-name

undo frr-policy route

Parameters

Parameter	Description	Value
route-policy route-policy-name	Specifies the name of the policy used to filter OSPF backup routes.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF FRR view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF IP FRR allows devices to fast switch traffic on fault links to back up links without interrupting traffic. This protects traffic and greatly improves the reliability of OSPF networks.

After the filtering policy is configured using the frr-policy route command, only the OSPF backup route that satisfies filtering rules can be delivered to the forwarding table.

Prerequisites

Before using the frr-policy route command, the OSPF IP FRR view has been entered by using the frr command, and the function of OSPF IP FRR has been enabled by using the loop-free-alternate command.

Configuration Impact

To protect the traffic over a specific OSPF route, you can configure a filtering policy route-policy-name that the OSPF route matches to ensure that the backup route can be added to the forwarding table. When this route fails, OSPF can fast switch the traffic to a backup route.

Precautions

The frr-policy route command is cyclic in nature, and only the latest configuration takes effect.

Creating a route-policy before it is referenced is recommended. By default, nonexistent route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent route-policy is referenced using the current command, OSPF adds all backup routes to the IP routing table.

Example

# Configure OSPF to add the OSPF backup routes that match the named ACL abc to the IP routing table.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] frr

[HUAWEI-ospf-1-frr] loop-free-alternate

[HUAWEI-ospf-1-frr] frr-policy route route-policy abc

Related Topics

frr-priority static low

Function

The frr-priority static low command enables dynamic backup links to take preference over static backup links so that the LFA algorithm is used to calculate the nexthop and outbound interface.

The undo frr-priority static command disables this function.

By default, this function is disabled, static backup links take preference over dynamic backup links during route selection.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

frr-priority static low

undo frr-priority static

Parameters

None

Views

OSPF FRR view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The nexthop and outbound interface of an OSPF loop-free backup link can be obtained using either of the following methods:

For a static backup link, after IP FRR is enabled using the ip frr command in the system view or VPN instance view, configure a nexthop and an outbound interface for the static backup link.
For a dynamic backup link, after OSPF IP FRR is enabled using the loop-free-alternate command, enable the device to use the LFA algorithm to calculate the nexthop and outbound interface for the dynamic backup link.

By default, static backup links take preference over dynamic backup links during route selection. However, static backup links are less flexible than dynamic backup links. If a link failure occurs, static backup links cannot update automatically, but dynamic backup links can. Therefore, to ensure automatic link updates, run the frr-priority static low command to enable dynamic backup links to take preference over static backup links so that the LFA algorithm is used to calculate the nexthop and outbound interface.

Prerequisites

The OSPF IP FRR view has been displayed using the frr command.

Example

# Enable the device to use the LFA algorithm to calculate the backup nexthop and outbound interface.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] frr

[HUAWEI-ospf-1-frr] frr-priority static low

Related Topics

graceful-restart helper-role (OSPF)

ip frr (system view)

graceful-restart (OSPF)

Function

The graceful-restart command enables the GR function.

The undo graceful-restart command disables the GR function.

By default, OSPF GR is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

graceful-restart [ period period | planned-only | partial ] ^*

undo graceful-restart [ period | planned-only | partial ] *

Parameters

Parameter	Description	Value
period period	Specifies the duration of GR.	It is an integer ranging from 1s to 1800s. The default value is 120s.
planned-only	Indicates that the switch supports only the planned GR. By default, the switch supports both the planned GR and unplanned GR.	-
partial	Indicates that the switch partially supports the GR. By default, the switch totally supports the GR.	-

Planned GR: indicates that a device manually restarts or performs a master/slave device switchover by using the command. Before the device restarts or performs a master/slave device switchover, Restarter will send a grace LSA.

Unplanned GR: indicates that a device restarts or performs a master/slave device switchover because of faults. A device directly performs a master/slave device switchover without sending a grace LSA, and then enters GR after the slave device goes Up. It is different from the planned GR.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The graceful-restart command enables OSPF GR to avoid the route flapping due to the traffic interruption or master/slave device switchover. After the graceful-restart command is run to enable GR for a switch, the Helper function is also enabled.

Prerequisites

Opaque LSAs provide a generic mechanism for OSPF extension:

OSPF supports GR using Type 9 LSAs.
OSPF supports TE using Type 10 LSAs.

Before configuring OSPF GR, you must enable opaque LSA capability running the opaque-capability enable command.

Configuration Impact

After an OSPF process is restarted using GR, the Restarter switch and the Helper switch reestablish the neighbor relationship, exchange routing information, synchronize the LSDB, and update the routing table and forwarding table. This implements OSPF fast convergence, prevents traffic interruption, and stabilizes the network topology.

Precautions

If there are special requirements on the GR Helper, run the graceful-restart helper-role command to configure the requirements.

You are advised not to enable OSPF GR if BFD is enabled for a stack of fixed switches. This is because the time taken for smooth data switching during a master/standby switchover in the stack may be longer than the BFD timeout interval, in which situation BFD sessions go Down and OSPF GR fails.

Example

# Enable OSPF GR and set the GR period to 200s.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] opaque-capability enable

[HUAWEI-ospf-1] graceful-restart period 200

Related Topics

opaque-capability enable

Function

The graceful-restart helper-role command configures a device as a GR helper.

The undo graceful-restart helper-role command cancels the configuration.

By default, the device does not function as a GR helper.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

graceful-restart [ period period | partial | planned-only ] ^* helper-role { [ { ip-prefix ip-prefix-name | acl-number acl-number | acl-name acl-name } | ignore-external-lsa | planned-only ] ^* | never }

undo graceful-restart [ period | partial | planned-only ] ^* helper-role [ [ { ip-prefix | acl-number | acl-name } | ignore-external-lsa | planned-only ] ^* | never ]

Parameters

Parameter	Description	Value
period period	Specifies the duration of GR.	The value is an integer that ranges from 1 to 1800, in seconds. The default value is 120.
planned-only	Configures the device to support only planned GR. By default, the device supports both the planned GR and unplanned GR.	-
partial	Configures the device to support partial GR. By default, the device supports totally GR.	-
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list. The name is a string.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
acl-number acl-number	Specifies the basic ACL number.	The value is an integer that ranges from 2000 to 2999.
acl-name acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.
ignore-external-lsa	Indicates that the device does not check Type 5 and Type 7 LSAs.	-
planned-only	Indicates that the device supports only planned GR.	By default, the device supports both planned GR and unplanned GR.
never	Indicates that the device does not support the Helper mode.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If an OSPF neighbor supports GR and can be a restarter, the current device needs to be set to helper mode, and the neighbor is assisted to complete the GR process.

After the graceful-restart command is run to enable GR for a switch, the Helper function is also enabled.

Prerequisites

OSPF supports GR using Type 9 LSAs. So before configuring GR, run the opaque-capability enable command to enable opaque LSA capability.

Example

# Configure a device as an OSPF GR helper and configure the helper to support only planned GR.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] graceful-restart helper-role planned-only

Related Topics

opaque-capability enable

gtsm default-action

Function

The gtsm default-action command sets the default action that is performed on the packets that do not match the GTSM policies.

The undo gtsm default-action drop command restores the default setting.

By default, the packets that do not match the GTSM policies can pass the filtering.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

gtsm default-action { drop | pass }

undo gtsm default-action drop

Parameters

Parameter	Description	Value
drop	Indicates that the packets that do not match the GTSM policies cannot pass the filtering. The packets are dropped.	-
pass	Indicates that the packets that do not match the GTSM policies can pass the filtering.	-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

For a network demanding high security, you can configure Generalized TTL Security Mechanism (GTSM) to improve the security of the OSPF network. GTSM defends against attacks by checking the Time-to-Live (TTL) value. If an attacker simulates real OSPF packets and keeps sending them to a switch, a switch receives the packets and directly sends them to the main control board for OSPF processing, without checking the validity of the packets. In this case, the switch is busy in processing these packets, causing high usage of the CPU. GTSM function protects the switch by checking whether the TTL value in the IP packet header is in a pre-defined range to improve the system security.

GTSM only checks the TTL values of the packets that match the GTSM policy. The packets that do not match the GTSM policy can pass the filtering using the undo gtsm default-action drop command or using the gtsm default-action command to set the pass parameter, or be dropped after the gtsm default-action command is run to set the drop parameter.

Configuration Impact

If the default action to be taken on GTSM packets is drop, the connection cannot be established by the switch. Therefore, GTSM improves security but reduces the ease of use.

Precautions

You can enable the log function by using the gtsm log drop-packet command to record the information about dropped packets for further fault location.

If you configure the default action by using the gtsm default-action command but not configure GTSM policy (the drop or pass parameter), GTSM does not take effect.

Example

# Set the default action performed on the packets that do not match the GTSM policies to drop.

<HUAWEI> system-view

[HUAWEI] gtsm default-action drop

# Set the default action performed on the packets that do not match the GTSM policy to pass the filtering.

<HUAWEI> system-view

[HUAWEI] undo gtsm default-action drop

Related Topics

gtsm log drop-packet all

ospf valid-ttl-hops

gtsm log drop-packet all

Function

The gtsm log drop-packet command configures a GTSM-capable switch to record logs when it drops packets.

The undo gtsm log drop-packet command configures a GTSM-capable switch not to record logs when it drops packets.

By default, a GTSM-capable switch does not record logs when dropping packets.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

gtsm log drop-packet all

undo gtsm log drop-packet all

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

For a network demanding higher security, you can configure Generalized TTL Security Mechanism (GTSM) to improve the security of the OSPF network. GTSM defends against attacks by checking the Time-to-Live (TTL) value. If an attacker simulates real OSPF packets and keeps sending them to a device, an interface board on the device receives the packets and directly sends them to the main control board for OSPF processing, without checking the validity of the packets. In this case, the device is busy in processing these packets, causing high usage of the CPU. GTSM function protects the device by checking whether the TTL value in the IP packet header is in a pre-defined range to improve the system security.

GTSM only checks the TTL values of the packets that match the GTSM policy. The packets that do not match the GTSM policy can be allowed or dropped by using the gtsm default-action command.

You can also enable the logging function by using the gtsm log drop-packet command to record the information about dropped packets for further fault location.

Prerequisites

The gtsm default-action drop command has been run.

Example

# Enable all GTSM-capable boards to record logs when they drop packets.

<HUAWEI> system-view

[HUAWEI] gtsm default-action drop

[HUAWEI] gtsm log drop-packet all

Related Topics

gtsm default-action

import-route (OSPF)

Function

The import-route command imports routes learned by other protocols.

The undo import-route command cancels the configuration.

By default, routes learned by other protocols are not imported.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

import-route { limit limit-number | { bgp [ permit-ibgp ] | direct | unr | rip [ process-id-rip ] | static | isis [ process-id-isis ] | ospf [ process-id-ospf ] } [ cost cost | type type | tag tag | route-policy route-policy-name ] ^* }

undo import-route { limit | bgp | direct | unr | rip [ process-id-rip ] | static | isis [ process-id-isis ] | ospf [ process-id-ospf ] }

Only the S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, and S5720S-SI support the bgp [ permit-ibgp ] and isis [ process-id-isis ] parameter.

Parameters

Parameter	Description	Value
bgp	Specifies the BGP protocol whose routes are imported. NOTE: If this parameter is specified, only EBGP routes can be imported; IBGP routes cannot be imported.	-
permit-ibgp	Indicates that IBGP routes are permitted to be imported. NOTE: The import of IBGP routes may cause routing loops. Therefore, do not configure this command unless it is necessary.	-
direct	Specifies the direct protocol whose routes are imported.	-
unr	Specifies the imported source routing protocol as unr. User Network Route (UNR) is allocated if dynamic routing protocols cannot be used when users are getting online.	-
rip	Specifies the RIP protocol whose routes are imported.	-
process-id-rip	Specifies the process ID of the protocol whose routes are imported.	The value is an integer ranging from 1 to 65535. The default value is 1.
static	Specifies the static protocol whose routes are imported.	-
isis	Specifies the IS-IS protocol whose routes are imported.	-
process-id-isis	Specifies the process ID of the protocol whose routes are imported.	The value is an integer ranging from 1 to 65535. The default value is 1.
ospf	Specifies the OSPF protocol whose routes are imported.	-
process-id-ospf	Specifies the process ID of the protocol whose routes are imported.	The value is an integer ranging from 1 to 65535. The default value is 1.
limit limit-number	The maximum number of external routes that can be imported into an OSPF process.	The value is an integer that ranges from 1 to 4294967295.
cost cost	Indicates the route cost.	The value is an integer ranging from 0 to 16777214. For details about the default value, see default (OSPF) .
route-policy route-policy-name	Imports only the route that meets the requirements of the specified route-policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
tag tag	Specifies the tag of the external LSA.	The value is an integer ranging from 0 to 4294967295. For details about the default value, see default (OSPF) .
type type	Specifies the type of the external routes.	The value is an integer ranging from 1 to 2. For details about the default value, see default (OSPF) . 1: Type 1 external route 2: Type 2 external route

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Importing routes discovered by other routing protocols can enrich OSPF routing information.

OSPF routes are classified into the following types in the descending order of priorities:

Intra-area routes: refer to the routes in an area within an autonomous system.
Inter-area routes: refer to the routes between different areas of the same AS. Intra-area routes and area external routes are internal routes of an AS.
Type 1 external routes: When the cost of external routes equals that of AS internal routes, and can be compared with the cost of OSPF routes, these external routes have a high reliability and can be configured as Type 1 external routes.
Type 2 external routes: When the cost of the routes from an ASBR to the destination outside an AS is much greater than the cost of the internal routes to the ASBR, these external routes have a low reliability and can be configured as Type 2 external routes.

On a non-PE device, only EBGP routes are imported after the import-route bgp command is configured. IBGP routes are also imported after the import-route bgp permit-ibgp command is configured. If IBGP routes are imported, routing loops may occur. To prevent loops, run the preference (OSPF) and preference (BGP) commands to specify preferences for OSPF and BGP routes. If IBGP routes need to be imported, run the import-route bgp permit-ibgp command, and run the preference (OSPF) and preference (BGP) commands to set the preference of OSPF ASE routes lower than that of IBGP routes (preference value of OSPF ASE routes larger than that of IBGP routes).

On a PE, configuring the import-route bgp command imports both EBGP routes and IBGP routes, regardless of whether the import-route bgp permit-ibgp command is configured or not. If the import-route bgp permit-ibgp command and the default-route-advertise (OSPF) command are both configured, the active IBGP default routes can be imported into OSPF.

Prerequisites

To import certain external routes using a route-policy, a route-policy must have been created using the route-policy command before running the import-route command.

Configuration Impact

After a route-policy is configured, the OSPF process imports only routes that satisfy certain conditions. This prevents devices from receiving unrequired routes.

Precautions

You can use the default (OSPF) command to configure default parameters for external routes imported by OSPF, including the cost, type (Type 1 or Type 2), tag, and number of routes.

The import-route (OSPF) command cannot import the default route of an external protocol. To enable a device to advertise the default route of an external protocol it learns when updating the OSPF routing table to other devices within the area, run the default-route-advertise (OSPF) command.

After the import-route direct command is executed, routes to the network segment where the IP address of the management interface belongs are also imported in the OSPF routing table. Therefore, use this command with caution.

Creating a route-policy before it is referenced is recommended. By default, nonexistent route-policies cannot be referenced using the command. If the route-policy nonexistent-config-check disable command is run in the system view and a nonexistent route-policy is referenced using the current command, all the routes learned by the specified protocol are imported to the OSPF routing table.

Example

# Import Type 2 RIP routes, with the process 40, the tag being 33 and cost being 50.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] import-route rip 40 type 2 tag 33 cost 50

Related Topics

default (OSPF)

route-policy

loop-free-alternate (OSPF)

Function

The loop-free-alternate command enables OSPF IP FRR to enable the device to use the LFA algorithm to calculate the nexthop and outbound interface for the dynamic backup link.

The undo loop-free-alternate command disables OSPF IP FRR.

By default, this function is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

loop-free-alternate

undo loop-free-alternate

Parameters

None

Views

OSPF FRR view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The frr command run in the OSPF view creates and displays the OSPF FRR view only, but cannot enable the OSPF IP FRR function. You must run the loop-free-alternate command in the OSPF view to enable OSPF IP FRR to create the loop-free backup route.

Prerequisites

The OSPF FRR view has been created and displayed using the frr command run in the OSPF view.

Follow-up Procedure

Run the frr-policy route command in the OSPF view to configure a filtering policy for OSPF IP FRR. Only the OSPF backup route that satisfies specific rules can be delivered to the forwarding table.

Example

# Enable OSPF IP FRR to create the loop-free backup route.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] frr

[HUAWEI-ospf-1-frr] loop-free-alternate

Related Topics

frr-policy route (OSPF)

lsa-arrival-interval

Function

The lsa-arrival-interval command sets an interval for receiving LSAs.

The undo lsa-arrival-interval command restores the default interval for receiving LSAs.

By default, the interval for receiving LSA packets is one second.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

lsa-arrival-interval { interval | intelligent-timer max-interval start-interval hold-interval }

undo lsa-arrival-interval

Parameters

Parameter	Description	Value
interval	Specifies the interval for receiving LSAs.	The value is an integer ranging from 0 to 10000, in ms.
intelligent-timer	Enables an intelligent timer to receive LSAs.	-
max-interval	Specifies the maximum interval for receiving LSAs.	The value is an integer ranging from 1 to 120000, in ms. The default value is 1000.
start-interval	Specifies the initial interval for receiving LSAs.	The value is an integer ranging from 0 to 60000, in ms. The default value is 500.
hold-interval	Specifies the Holdtime interval for receiving LSAs.	The value is an integer ranging from 1 to 60000, in ms. The default value is 500.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To prevent frequent LSA updates caused by network connection or frequent route flapping, you can set the interval for receiving LSAs using this command. A router receives LSAs only when it meets the set interval.

In a stable network where routes need to be fast converged, you can set the interval for receiving LSAs at millisecond level to receive and update LSAs in time. The change of the topology or the route, therefore, can be immediately detected, and LSDB synchronization speed is improved.

If there is no special requirement for the network, using the default value is recommended.

Configuration Impact

After this command is configured, the interval for receiving LSAs is as follows:

The initial interval for receiving LSAs is specified by the parameter start-interval.
The interval for receiving LSAs for the nth (n≥2) time is equal to hold-interval × 2^(n-2).
When the interval specified by hold-interval×2^(n-2) reaches the maximum interval specified by max-interval, OSPF performs SPF calculation at the maximum interval until max-interval expires without flapping or the OSPF process is restarted.

Precautions

It is recommended to set the receiving interval specified by lsa-arrival-interval to be a value smaller than or equal to the Holdtime interval specified bylsa-originate-interval.

Example

# Set the interval for receiving LSAs to 0 milliseconds.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] lsa-arrival-interval 0

Related Topics

lsa-originate-interval

Function

The lsa-originate-interval command sets an interval for updating LSAs.

The undo lsa-originate-interval command restores the default interval for updating LSAs.

By default, the interval for updating LSA packets is 5 seconds.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

lsa-originate-interval { 0 | { intelligent-timer max-interval start-interval hold-interval | other-type interval } ^* }

undo lsa-originate-interval

Parameters

Parameter	Description	Value
0	Sets an interval for updating LSAs to 0 ms, that is, deletes the initial interval (5000 ms) for updating LSAs.	-
intelligent-timer	Enables an intelligent timer to update OSPF router LSAs and network LSAs.	-
max-interval	Specifies the maximum interval for updating OSPF LSAs.	The value is an integer ranging from 1 to 120000, in ms. The default value is 5000.
start-interval	Specifies the initial interval for updating OSPF LSAs.	The value is an integer that ranges from 0 to 60000, in ms. The default value is 500.
hold-interval	Specifies the Holdtime interval for updating OSPF LSAs.	The value is an integer ranging from 1 to 60000, in ms. The default value is 1000.
other-type	Sets the interval for updating the LSAs other than the OSPF router LSAs and network LSAs.	-
interval	Specifies the interval for updating LSAs.	The value is an integer ranging from 0 to 10, in seconds. The default value is 5.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

In a stable network where routes need to be fast converged, you can set the interval for receiving LSAs at millisecond level to update LSAs in time. The change of the topology or the route, therefore, can be immediately detected, and LSDB synchronization speed is improved.

If there is no special requirement for the network, using the default value is recommended.

Configuration Impact

After this command is configured, the interval for updating LSAs is as follows:

The initial interval for updating LSAs is specified by the parameter start-interval.
The interval for updating LSAs for the nth (n≥2) time is equal to hold-interval × 2^(n-2).
When the interval specified by hold-interval×2^(n-2) reaches the maximum interval specified by max-interval, OSPF performs SPF calculation at the maximum interval until max-interval expires without flapping or the OSPF process is restarted.

Precautions

It is recommended to set the updating interval specified by lsa-originate-interval to be a value longer than or equal to the Holdtime interval specified by lsa-arrival-interval.

Example

# Set the interval for updating LSAs to 0 milliseconds.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] lsa-originate-interval 0

Related Topics

lsa-arrival-interval

lsdb-overflow-limit

Function

The lsdb-overflow-limit command sets the maximum number of external LSAs in an OSPF LSDB.

The undo lsdb-overflow-limit command restores the default configuration.

By default, the maximum number of external LSAs is not set.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

lsdb-overflow-limit number

undo lsdb-overflow-limit

Parameters

Parameter	Description	Value
number	Specifies the maximum number of external LSAs in an LSDB.	The value is an integer ranging from 1 to 1000000.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When the number of external LSAs (Type 5 and Type 7 LSAs) imported by OSPF exceeds the limit, the excessive external LSAs cannot be processed properly and are discarded.

To avoid the preceding problem, you can set the maximum number of external LSAs in the LSDB to adjust and optimize OSPF networks.

Prerequisites

If OSPF is in LSDB overflow status is displayed in the display ospf lsdb brief command output, you must run the lsdb-overflow-limit command to set the maximum number of external LSAs imported by OSPF.

Precautions

The configuration of this command must be consistent in the entire AS.

Example

# Set a maximum number of 400000 external LSAs allowed in an LSDB.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] lsdb-overflow-limit 400000

Related Topics

display ospf lsdb

maximum load-balancing (OSPF)

Function

The maximum load-balancing command sets the maximum number of equal-cost routes for load balancing.

The undo maximum load-balancing command restores the default setting.

By default, the maximum number of equal-cost routes on the S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720S-SI or S5720SI is 8, and the maximum number of equal-cost routes on the S5720EI, S5720HI, S6720S-EI, or S6720EI is 16.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

maximum load-balancing number

undo maximum load-balancing

Parameters

Parameter	Description	Value
number	Specifies the maximum number of equal-cost routes.	The value is an integer that ranges from 1 to 8 on the S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720S-SI or S5720SI. The value ranges from 1 to 16 on the S5720EI, S5720HI, S6720S-EI, or S6720EI.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If a routing protocol discovers multiple routes with the same cost to a single destination, traffic can be balanced among these routes. The maximum load-balancing command sets the maximum number of equal-cost routes that can carry out load balancing. This optimizes the routing policy and ensures traffic forwarding on a complex network.

Configuration Impact

Packets will be balanced among multiple equal-cost routes to a single destination.

Follow-up Procedure

If more existing equal-cost OSPFv3 routes than the value set using the maximum load-balancing command are available, valid routes are selected for load balancing based on the following criteria:

Route preference: Routes with lower preferences are selected for load balancing.
Interface index: If routes have the same priorities, routes with higher interface index values are selected for load balancing.
Next hop IP address: If routes have the same priorities and interface index values, routes with larger IP address are selected for load balancing.

The nexthop command allows routes with a specified weight to carry out load balancing.

Precautions

To disable load balancing, set the value of number to 1.

Example

# Set the maximum number of the equal-cost routes.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] maximum load-balancing 2

# Restore the default maximum number of equal-cost routes for carrying out load balancing.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] undo maximum load-balancing

Related Topics

nexthop (OSPF)

maximum-routes

Function

The maximum-routes command sets the maximum number of routes of different types that OSPF supports.

The undo maximum-routes command restores the default maximum number of routes of different types that OSPF supports.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

maximum-routes { external | inter | intra } number

undo maximum-routes { external | inter | intra }

Parameters

Parameter	Description	Value
external	Indicates the maximum number of AS external routes that OSPF supports.	-
inter	Indicates the maximum number of inter-area routes that OSPF supports.	-
intra	Indicates the maximum number of intra-area routes that OSPF supports.	-
number	Specifies the maximum number of routes of different types.	The value is an integer. When the external parameter is specified, the value of number is an integer ranging from 100 to 5000000. When the inter parameter is specified, the value of number is an integer ranging from 100 to 1000000. When the intra parameter is specified, the value of number is an integer ranging from 100 to 100000.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Based on the real world situation of a network, such as the convergence speed, you can run the maximum-routes command to configure the maximum number of routes of different types. This ensures full use of network resources and improves network performance.

Precautions

The maximum number of routes supported by OSPF cannot exceed the maximum number of all routes supported by the switch.

The maximum-routes command configuration limits the maximum number of routes that can be locally calculated. Therefore, the command configuration affects the maximum number of routes that can be sent, but does not affect the maximum number of LSAs that can be received.

Example

# Set the maximum number of routes that OSPF supports.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] maximum-routes intra 500

mesh-group enable

Function

The mesh-group enable command enables the mesh-group function.

The undo mesh-group enable command disables the mesh-group function.

By default, the mesh-group function is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

mesh-group enable

undo mesh-group enable

Parameters

None

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When concurrent links exist between the device and its neighbor, the mesh-group enable command enables the mesh-group function. The router ID of a neighboring device uniquely identifies a mesh group. After LSAs are received, the device selects a primary link to flood the received LSAs, without performing reverse flooding. This prevents repeated flooding, reduces the load on the links, and saves system resources.

Device interfaces that meet the following conditions can form a mesh group:

The interfaces belong to the same area and OSPF process.
The neighbor status is Exchange or Full.
Each interface is connected only to one neighbor.

Precautions

After the device is enabled with the mesh-group function, if the router IDs of the directly connected neighbor are the same, the LSDBs of the entire network cannot be synchronized and routes cannot be calculated correctly. In this case, you need to reconfigure the router ID of the neighbors, and then restart the neighbors to validate the configured router ID.

Example

# Enable the mesh-group function on the switch.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] mesh-group enable

Related Topics

display ospf mesh-group

network (OSPF area)

Function

The network command specifies the interface that runs OSPF and the area to which the interface belongs.

The undo network command deletes the interface that runs OSPF.

By default, an interface does not belong to any area.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

network network-address wildcard-mask [ description text ]

undo network network-address wildcard-mask

Parameters

Parameter	Description	Value
network-address	Specifies the address of the network segment where the interface resides.	The value is in dotted decimal notation.
wildcard-mask	Specifies the wildcard mask of an IP address, which is the reverse form of the mask of the IP address. For example, 0.0.0.255 indicates that the mask length is 24 bits.	The value is in dotted decimal notation.
description text	Specifies the description of the specified OSPF network segment.	The value is a string of 1 to 80 case-sensitive characters with spaces supported.

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After creating an OSPF process, you can run the network command to configure the network segments in an area and specify network-address and wildcard-mask to configure one or multiple interfaces in an area. To run OSPF on an interface, ensure that the primary IP address of this interface is in the network segment range specified in the network (OSPF) command. If the secondary IP address of the main interface is in the network segment range specified in this command, the main interface cannot run OSPF.

OSPF can run on an interface only when the following two conditions are met:

The mask length of the interface's IP address is not less than that specified in the network command. OSPF uses a reverse mask. For example, 0.0.0.255 indicates that the mask length is 24 bits.

When the wildcard-mask parameter in the network command is set to all 0s, OSPF runs on the interface if its IP address is the IP address specified in the network network-address command.
The primary address of the interface must be within the network segment range specified in the network command.

Precautions

OSPF neighbor relationships cannot be established using the secondary IP addresses of interfaces.
After the network 0.0.0.0 0.0.0.0 command is configured, the device automatically changes the command to network 0.0.0.0 255.255.255.255. That is, all interfaces (including the management interface) will run OSPF. Therefore, exercise caution when configuring this command.
For the same network address wildcard-mask, the last description configured by description takes effect.
On a loopback interface, by default, OSPF advertises its IP address in the form of a 32-bit host route, independent of the mask length of the IP address on the interface.
To advertise the network segment route of a loopback interface, you need to run the ospf network-type command to set the network type to broadcast or NBMA.
When an OSPF sham link is configured, the local address cannot be advertised through the OSPF process of a private network.
Two areas that overlap cannot be configured between different processes in the same instance, or between different areas in the same process.
The ospf enable command configuration takes precedence over the network command configuration.

Example

# Configure the primary IP address of the interface that runs OSPF to be in the network segment of 192.168.1.0/24, set the ID of the OSPF area where the interface resides to 2, and configure the description for the network segment.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] area 2

[HUAWEI-ospf-100-area-0.0.0.2] network 192.168.1.0 0.0.0.255 description this network is connected to Beijing

Related Topics

maximum load-balancing (OSPF)

ospf network-type

ospf enable

nexthop (OSPF)

Function

The nexthop command sets a preference for equal-cost routes. After OSPF calculates the equal-cost routes, the next hop is chosen from these equal-cost routes based on the value of weights. A smaller value indicates a higher preference.

The undo nexthop command cancels the preference of these equal-cost routes.

By default, the value of weight is 255. Equal-cost routes have no preference, and they forward packets at the same time. Load balancing is performed among them.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

nexthop ip-address weight value

undo nexthop ip-address

Parameters

Parameter	Description	Value
ip-address	Indicates the IP address of the next hop.	The value is in dotted decimal notation.
weight value	Indicates the weight of the next hop. A smaller value indicates a higher preference.	It is an integer that ranges from 1 to 254.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

You can run the nexthop command to set a high preference for specified valid routes if both of the following conditions are met:

The number of equal-cost routes on a network is larger than the value configured using the maximum load-balancing command.
Valid routes must be specified for load balancing.

Example

# Set a preference for equal-cost routes in OSPF.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] nexthop 10.0.0.3 weight 1

Related Topics

nssa (OSPF Area)

Function

The nssa command configures an NSSA.

The undo nssa command cancels the configuration of an NSSA.

By default, no OSPF area is configured as an NSSA.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

nssa [ { default-route-advertise [ backbone-peer-ignore ] | suppress-default-route } | flush-waiting-timer interval-value | no-import-route | no-summary | set-n-bit | suppress-forwarding-address | translator-always | translator-interval interval-value | zero-address-forwarding | translator-strict ] ^*

undo nssa [ flush-waiting-timer interval-value ]

Parameters

Parameter	Description	Value
default-route-advertise	Generates default Type7 LSAs on the ASBR and then advertises them to the NSSA. NOTE: The ABR generates a default NSSA LSA (Type7 LSA) automatically and advertises it in the NSSA. Type 7 LSAs carrying the default route will be generated only when the default route 0.0.0.0/0 exists in the routing table on the ASBR.	-
backbone-peer-ignore	Prevents the ABR from checking the neighbor status when the ABR generates default Type 7 LSAs and advertises them to the NSSA. Specifically, the ABR generates default Type 7 LSAs and advertises them to the NSSA as long as an interface that is Up exists in the backbone area.	-
suppress-default-route	Generates default Type-7 LSAs on the ASBR or ABR and then not advertises them to the NSSA.	-
flush-waiting-timer interval-value	Indicates the interval for an ASBR to send aged Type 5 LSAs. The parameter takes effect only when it is set.	The value is an integer that ranges from 1 to 40, in seconds.
no-import-route	Indicates that no external route is imported to an NSSA.	-
no-summary	Indicates that an ABR is prohibited from sending summary LSAs to the NSSA.	-
set-n-bit	Sets the N-bit in DD packets.	-
suppress-forwarding-address	Sets the FA of the Type 5 LSAs translated from Type 7 LSAs by the NSSA ABR to 0.0.0.0.	-
translator-always	Specifies an ABR in an NSSA as an all-the-time translator. Multiple ABRs in an NSSA can be configured as translators.	-
translator-interval interval-value	Specifies the timeout period of a translator.	The value is an integer ranging from 1 to 120, in seconds. The default value is 40.
zero-address-forwarding	Sets the FA of the generated NSSA LSAs to 0.0.0.0 when external routes are imported by the ABR in an NSSA.	-
translator-strict	Configures the translator to perform strict check on the P-bit flag. The translator determines whether to translate Type 7 LSAs into Type 5 LSAs based on the P-bit flag.	-

Views

OSPF area view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

An NSSA is configured in the scenario where AS external routes are to be imported but not forwarded to save system resources. AS external routes can be imported to an NSSA and transmitted to the entire NSSA.

All switches in the NSSA must be configured with NSSA attributes using the nssa command.

The nssa command is applicable to the following scenarios:

The default-route-advertise parameter is configured to advertise Type 7 LSAs carrying the default route on the ASBR to the NSSA.

Regardless of whether the default route 0.0.0.0/0 exists in the routing table on the ABR, Type 7 LSAs carrying the default route will be generated. However, Type 7 LSAs carrying the default route will be generated on the ASBR only when the default route 0.0.0.0/0 exists in the routing table on the ASBR.
When the area to which the ASBR belongs is configured as an NSSA, invalid Type 5 LSAs from other switches in the area where LSAs are flooded will be reserved. These LSAs will be deleted only when the aging time reaches 3600s. The switch performance is affected because the forwarding of a large number of LSAs consumes the memory resources. To resolve such a problem, you can set the parameter flush-waiting-timer to the maximum value 3600s for Type 5 LSAs. This ensures that the invalid Type 5 LSAs from other switches can be deleted in time.
- When the LS age field value (aging time) in the header of an LSA reaches 3600s, the LSA is deleted.
- If an ASBR also functions as an ABR, flush-waiting-timer does not take effect. This prevents Type 5 LSAs in the non-NSSAs from being deleted.
If an ASBR also functions as an ABR, the no-import-route parameter is configured to prevent external routes imported using the import-route command from being advertised to the NSSA.
The no-summary parameter is configured on an ABR to reduce the number of LSAs that are transmitted to the NSSA. This implementation prevents the ABR from transmitting Type 3 LSAs to the NSSA.

After the nssa default-route-advertise backbone-peer-ignore no-summary command is run, the ABR generates default Type 7 and Type 3 LSAs as long as an interface that is Up exists in the backbone area. The default Type 3 LSAs preferentially take effect.
After the set-n-bit parameter is configured, the N-bit is set in the database description (DD) packets during the synchronization between the switch and neighboring switches.
If multiple ABRs are deployed in the NSSA, the system automatically selects an ABR (generally the switch with the largest router ID) as a translator to convert Type 7 LSAs into Type 5 LSAs. You can configure the translator-always parameter on an ABR to specify the ABR as an all-the-time translator. To specify two ABRs for load balancing, configure the translator-always parameter on the chosen ABRs to specify the ABRs as all-the-time translators. You can use this command to pre-configure a fixed translator to prevent LSA flooding caused by translator role changes.
The translator-interval parameter is used to ensure uninterrupted services when translator roles change. The value of interval-value must be greater than the flooding period.

Configuration Impact

Configuring or deleting NSSA attributes will trigger routing updates in the area. A second configuration of NSSA attributes can be implemented or canceled only after a routing update is complete.

Precautions

It is recommended that a loopback address be configured for a switch in the NSSA so that the loopback address can be automatically selected as the FA. If other switches have routes of the same cost to the switch in the NSSA, load balancing is performed.

When the last ordinary area (other than a stub area or NSSA) under an OSPF process is deleted, useless Type 5 LSAs originated by the local switch in the area where LSAs are flooded will be deleted immediately. The local switch still reserves useless Type 5 LSAs from other switches. These useless Type 5 LSAs will be deleted only when the aging time reaches 3600s.

Example

# Configure area 1 as an NSSA.

<HUAWEI> system-view

[HUAWEI] ospf 1

[HUAWEI-ospf-1] area 1

[HUAWEI-ospf-1-area-0.0.0.1] nssa

Related Topics

default-cost (OSPF Area)

opaque-capability enable

Function

The opaque-capability enable command enables the Opaque-LSA capability so that an OSPF process can generate Opaque LSAs and receive Opaque LSAs from neighbors.

The undo opaque-capability command disables the Opaque-LSA capability.

By default, the Opaque-LSA capability is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

opaque-capability enable

undo opaque-capability

Parameters

None

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Opaque LSAs provide a generic mechanism for OSPF extension:

OSPF supports GR using Type 9 LSAs.
OSPF supports TE using Type 10 LSAs.

Before configuring OSPF GR or OSPF TE, you must enable opaque LSA capability running the opaque-capability enable command.

Configuration Impact

Enabling or disabling the opaque LSA function may delete and re-establish all sessions and instances.

Example

# Enable OSPF opaque-lsa.

<HUAWEI> system-view

[HUAWEI] ospf

[HUAWEI-ospf-1] opaque-capability enable

Related Topics

authentication-mode (OSPF area)

Function

The ospf command creates and runs an OSPF process.

The undo ospf command terminates an OSPF process.

By default, OSPF is disabled, that is, no OSPF process runs.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] ^*

undo ospf process-id [ flush-waiting-timer time ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535. By default, it is 1.
router-id router-id	Specifies a router ID.	The value is in dotted decimal notation.
vpn-instance vpn-instance-name	Specifies the name of a VPN instance.	The value must be an existing VPN instance name.
flush-waiting-timer time	Indicates the interval for generating aged LSAs. The parameter takes effect only when it is set.	The value is an integer that ranges from 1 to 40, in seconds.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can set OSPF parameters only after creating an OSPF process.

OSPF supports multi-process. More than one OSPF process can run on the same device and are independent of each other. Route interaction between different OSPF processes is similar to route interaction between different routing protocols.

The ID of an OSPF device can be configured manually. If no ID is specified through a command for an OSPF device, the router selects a router ID based on IP addresses of current interfaces. The largest IP address in loopback addresses is taken as the router ID. If no loopback interface is configured, the largest IP address configured on the interface is selected as the router ID.

In any of the following situations, the router ID is re-selected:

The ospf command is run to re-configure an OSPF router ID.
The system router ID is re-configured, and the OSPF process is restarted.
The IP address of the original system router ID is deleted, and the OSPF process is restarted.

Configuration Impact

After an OSPF process is disabled using undo ospf command, the receive end still maintains the LSAs generated by this OSPF process. These invalid LSAs occupy the system memory and are deleted only when the LS age field (aging time) reaches 3600 seconds. When the undo ospf process-id flush-waiting-timer time command is used to delete an OSPF process, the switch regenerates an LSA in the set time and sets the LS age field to 3600 seconds. After other switches receive the LSA with the LS age field as 3600 seconds, they delete the LSA immediately. If the host does not send all the LSAs in the set time, other switches still reserve invalid LSAs.

When the LS age field (aging time) in the LSA header reaches 3600 seconds, this LSA is deleted.

Precautions

An interface on a device belongs to only one OSPF process.

If a VPN instance is specified, the OSPF process specified in this command belongs to this VPN instance. If no VPN instance is specified, the OSPF process specified in this command belongs to the global VPN instance. vpn-instance-name cannot be changed after being specified.

The router ID of each OSPF process must be unique on the entire network; otherwise, the OSPF neighbor relationship cannot be set up and routing information is incorrect. Configuring a unique router ID for each OSPF process on each OSPF device is recommended.

Example

# Run an OSPF process.

<HUAWEI> system-view

[HUAWEI] ospf 100 router-id 10.10.10.1 vpn-instance huawei

ospf authentication-mode

Function

The ospf authentication-mode command sets an authentication mode and password used between neighboring nodes.

The ospf authentication-mode null command configures the null authentication mode on an interface.

The undo ospf authentication-mode command deletes the authentication mode on an interface.

By default, an interface does not authenticate OSPF packets.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf authentication-mode { simple [ plain plain-text | [ cipher ] cipher-text ] | null }

ospf authentication-mode { md5 | hmac-md5 | hmac-sha256 } [ key-id { plain plain-text | [ cipher ] cipher-text } ]

ospf authentication-mode keychain keychain-name

undo ospf authentication-mode

Only the S6720EI, S6720S-EI, S5720HI, and S5720EI support the keychain keychain-name parameter.

Parameters

Parameter	Description	Value
simple	Indicates simple authentication. NOTICE: Simple authentication carries potential security risks. As such, HMAC-SHA256 authentication is recommended.	In simple authentication, the password type is cipher by default.
plain	Indicates plain authentication. Only plain text can be entered, and only plain text is displayed when the configuration file is viewed. NOTICE: If plain is selected, the password is saved in the configuration file in plain text. This carries security risks. Selecting cipher to save the password in cipher text is recommended.	-
plain-text	Specifies a plain text password.	plain-text is a string of 1 to 8 characters without spaces when simple is configured, and is a string of 1 to 255 characters without spaces when md5, hmac-md5 or hmac-sha256 is configured.
cipher	Indicates cipher authentication. Either plain text or cipher text can be entered, and cipher text is displayed when the configuration file is viewed.	When cipher is configured, enter only the password in cipher text. Then, the password is displayed in cipher text in configuration files. MD5 authentication, HMAC-SHA256 authentication or HMAC-MD5 authentication uses the password in cipher text by default.
cipher-text	Specifies a cipher text password.	The value is a string of characters without spaces. In simple authentication, a plain text password is a string of 1 to 8 characters and a cipher text password is a string of 24 or 32 or 48 characters. In MD5 authentication, HMAC-SHA256 authentication or HMAC-MD5 authentication, a plain text password is a string of 1 to 16 characters and a cipher text password is a string of 20 to 392 characters.
md5	Indicates MD5 authentication. NOTICE: MD5 authentication carries potential security risks. As such, HMAC-SHA256 authentication is recommended.	-
hmac-md5	Indicates HMAC-MD5 authentication. NOTICE: HMAC-MD5 authentication carries potential security risks. As such, HMAC-SHA256 authentication is recommended.	-
hmac-sha256	Indicates HMAC-SHA256 authentication.	-
key-id	Specifies the authentication key ID of the interface's cipher authentication. The key ID must be consistent with that of the peer.	The value is an integer that ranges from 1 to 255.
keychain	Indicates keychain authentication. NOTE: Before configuring this parameter, run the keychain command to create a keychain. Then, run the key-id, key-string, and algorithm commands to configure a key ID, a password, and an authentication algorithm for this keychain. Otherwise, OSPF authentication will fail.	-
keychain-name	Specifies the keychain name.	The value is a string of 1 to 47 case-insensitive characters. Except the question mark (?) and space. However, when double quotation marks (") are used around the string, spaces are allowed in the string.
null	Indicates null authentication.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Due to the defects and non-strict implementation of the TCP/IP protocol suite and increasing attacks on TCP/IP networks, the impact generated by attacks on the network may become more serious. Attacks on network devices may lead to a network crash. To improve OSPF network security, configure authentication.

Configuration Impact

Interface authentication is used to set the authentication mode and password used between neighboring devices. It takes precedence over area authentication.

Precautions

Null authentication is an authentication method. It does not indicate that no authentication is configured.

The authentication mode and password configured for interfaces on the same network segment must be the same.

OSPF does not support the configuration on a null interface.

An authentication password cannot contain spaces.

Example

# Configure OSPF HMAC-SHA256 authentication on VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf authentication-mode hmac-sha256

# Configure OSPF HMAC-SHA256 authentication on GE0/0/1.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf authentication-mode hmac-sha256

Related Topics

ospf bfd

Function

The ospf bfd command enables BFD on an OSPF interface or sets parameter values for a BFD session.

The undo ospf bfd command deletes BFD on an OSPF interface or restores the default parameter values of a BFD session.

By default, BFD is not enabled on any OSPF interfaces.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

ospf bfd enable

undo ospf bfd enable

ospf bfd { min-rx-interval receive-interval | min-tx-interval transmit-interval | detect-multiplier multiplier-value | frr-binding } ^*

undo ospf bfd { min-rx-interval | min-tx-interval | detect-multiplier | frr-binding } ^*

Only the S6720EI, S6720S-EI, S5720HI, and S5720EI support the frr-binding parameter.

Parameters

Parameter	Description	Value
enable	Enables BFD.	-
min-rx-interval receive-interval	Indicates the minimum interval at which BFD packets are received from the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720HI, the value ranges from 3 to 1000.By default, the minimum interval for receiving BFD packets is 1000 ms.
min-tx-interval transmit-interval	Indicates the minimum interval at which BFD packets are sent to the remote end.	The value is an integer that ranges from 100 to 1000, in milliseconds. After the set service-mode enhanced command is configured on the S5720HI, the value ranges from 3 to 1000.By default, the minimum interval for receiving BFD packets is 1000 ms.
detect-multiplier multiplier-value	Specifies the local detection multiplier.	The value is an integer ranging from 3 to 50. By default, it is 3.
frr-binding	Binds the BFD status to the link status of an interface. That is, when the BFD status goes Down, the link status of the interface also goes Down. This enables traffic to be switched to the backup path.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

A link failure or topology change causes devices to recalculate routes. Therefore, the convergence of routing protocols must be sped up to improve network performance.

Link faults are unavoidable. Therefore, a feasible solution is required to detect faults faster and notify routing protocols of the faults immediately. If BFD is associated with routing protocols and a link fault occurs, BFD can speed up the convergence of routing protocols.

Prerequisites

The configured parameters of the BFD session are valid on an interface only when BFD is enabled on the interface.

Procedure

The receive-interval is obtained through the negotiation between the local end and peer end by comparing the values of the local min-rx-interval and the peer min-tx-interval. If the local end fails to receive a BFD packet from the peer end within an interval of receive-interval x multiplier-value, it considers that the neighbor is Down.

Configuration Impact

If global BFD is not enabled, you can enable BFD on an interface but cannot set up BFD sessions. Similarly, if only parameters of a BFD session are set but the ospf bfd enable command is not used, the BFD session cannot be set up.

BFD configured on an interface takes precedence over BFD configured in a process. If BFD is enabled on an interface, the BFD parameters on the interface are used to establish BFD sessions.

Precautions

After BFD is enabled, BFD sessions can be created only between the two ends that have set up an OSPF neighbor relationship and the relationship is in the Exstart state.
The ospf bfd enable command and the ospf bfd block command are mutually exclusive.
After BFD is disabled from an interface through the undo ospf bfd enable command, the parameters for setting up BFD sessions remain on this interface but do not take effect.

Example

# Enable BFD on VLANIF100 and set the minimum interval for receiving BFD packets to 400 ms and the local detection multiplier to 4.

<HUAWEI> system-view
[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf bfd enable

[HUAWEI-Vlanif100] ospf bfd min-rx-interval 400 detect-multiplier 4

# Enable BFD on GE0/0/1 and set the minimum interval for receiving BFD packets to 400 ms and the local detection multiplier to 4.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf bfd enable
[HUAWEI-GigabitEthernet0/0/1] ospf bfd min-rx-interval 400 detect-multiplier 4

Related Topics

bfd all-interfaces (OSPF)

ospf bfd block

Function

The ospf bfd block command prevents an interface from dynamically setting up a BFD session.

The undo ospf bfd block command cancels the configuration.

By default, the device does not prevent an interface from dynamically setting up a BFD session.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

ospf bfd block

undo ospf bfd block

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After the bfd all-interfaces enable command is used for an OSPF process, BFD sessions are created on all OSPF interfaces whose neighbor status is Full. If you do not want some interfaces to have BFD sessions created, run the ospf bfd block command to prevent these interfaces from dynamically setting up BFD sessions.

Prerequisites

BFD has been enabled on interfaces.

Precautions

The ospf bfd enable command and the ospf bfd block command are mutually exclusive.

Example

# Prevent VLANIF100 from dynamically setting up a BFD session.

<HUAWEI> system-view
[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf bfd block

# Prevent GE0/0/1 from dynamically setting up a BFD session.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf bfd block

Related Topics

ospf bfd

bfd all-interfaces (OSPF)

ospf cost

Function

The ospf cost command sets a cost for an OSPF on an interface.

The undo ospf cost command restores the default cost for OSPF.

By default, OSPF automatically calculates its cost based on its interface bandwidth.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf cost cost

undo ospf cost

Parameters

Parameter	Description	Value
cost	Specifies the cost of an OSPF-enabled interface.	The value is an integer ranging from 1 to 65535. By default, it is 1.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF can automatically calculate the link cost for an interface based on the bandwidth of the interface. You can also set the link cost for the interface through ospf cost commands.

Load balancing can be performed among several routes with the same protocol, cost, and destination address. According to the actual networking conditions, you can determine whether to perform load balancing by changing the cost of the interface.

Configuration Impact

If no cost is set for an OSPF interface using the ospf cost command, OSPF automatically calculates its cost based on the interface bandwidth. The calculation formula is as follows: Cost of the interface = Bandwidth reference value/Interface bandwidth. The integer of the calculated result is the cost of the interface. If the calculated result is smaller than 1, the cost is 1. Changing the bandwidth reference value changes the cost of an interface.

By default, the bandwidth reference value is 100 Mbit/s divided by the interface bandwidth. With the formula 100000000/Bandwidth, the default costs of the Ethernet (100 Mbit/s) interface is 1.

No default cost is configured for trunk interfaces, because a trunk interface has multiple member interfaces that are in constant change.

Precautions

The ospf cost command cannot run on null interfaces.

Example

# Set the cost of VLANIF100 that runs OSPF to 65.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf cost 65

# Set the cost of GE0/0/1 that runs OSPF to 65.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf cost 65

Related Topics

bandwidth-reference (OSPF)

ospf dr-priority

Function

The ospf dr-priority command sets a priority for an interface that participates in the DR election.

The undo ospf dr-priority command restores the default setting.

By default, the priority is 1.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf dr-priority priority

undo ospf dr-priority

Parameters

Parameter	Description	Value
priority	Specifies the priority of an interface that participates in the DR or BDR election. A larger value indicates a higher priority.	The value is an integer ranging from 0 to 255.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The DR priority of an interface determines whether it is qualified to be a DR. The interface with the highest DR priority is elected as the DR. If the DR priority of an interface on a device is 0, the device cannot be elected as a DR or a BDR. On a broadcast or NBMA network, you can set a DR priority for an interface to determine whether it is qualified to be a DR or a BDR.

Configuration Impact

When the DR and BDR are elected on a network segment, they send DD packets to all neighboring nodes and set up adjacencies with all neighboring nodes.

Precautions

Restarting or shutting down an interface will interrupt the OSPF adjacency between devices. Therefore, perform the operation with caution.

If the DR priority of a device is re-configured, the DR or BDR on the network will not be re-elected. You can re-elect a DR or a BDR by using either of the following methods. This, however, will interrupt the OSPF adjacency between devices. Therefore, use the following methods with caution.

Restart the OSPF processes on all devices.
Run the shutdown and then undo shutdown commands on the interfaces where OSPF adjacencies are set up.

In OSPF, the DR priority cannot be configured for null interfaces.

Example

# Set the priority of VLANIF100 that participates in the DR election to 8.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf dr-priority 8

# Set the priority of GE0/0/1 that participates in the DR election to 8.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf dr-priority 8

ospf enable

Function

The ospf enable command enables OSPF on an interface.

The undo ospf enable command disables OSPF on an interface.

By default, the interface does not run OSPF.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf enable [ process-id ] area area-id

undo ospf enable [ process-id ] area area-id

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535. The default value is 1.
area area-id	Specifies an area ID.	The value can be a decimal integer or an IP address. When the value is an integer, the value ranges from 0 to 4294967295.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The ospf enable command configuration takes precedence over the network command configuration.

After the undo ospf enable command is run to disable OSPF on an interface, the network configuration takes effect on the interface automatically.

Configuration Impact

The interface will alternate between Up and Down when the ospf enable command and the network command are run on the interface repeatedly.

Precautions

An interface can be configured with only one OSPF process.

The configured interface and the OSPF process must be in the same VPN.

The ospf enable command can be configured on an interface before an OSPF process is created. The interface specified by the ospf enable command and the created OSPF process must be in the same VPN.
If a process is created before the ospf enable command is run on an interface, the process of the interface and existing process must belong to the same VPN. Otherwise, the ospf enable command cannot be run.
If no OSPF process is created, interfaces that belong to different VPN instances cannot be added to the same OSPF process.

Example

# Enable VLANIF100 in the specified OSPF area.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf enable 1 area 0

# Enable GE0/0/1 in the specified OSPF area.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf enable 1 area 0

Related Topics

network (OSPF area)

ospf filter-lsa-out

Function

The ospf filter-lsa-out command configures an OSPF interface to filter outgoing LSAs.

The undo ospf filter-lsa-out command disables an OSPF interface from filtering outgoing LSAs.

By default, outgoing LSAs are not filtered.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf filter-lsa-out { all | { summary [ acl { acl-number | acl-name } ] | ase [ acl { acl-number | acl-name } ] | nssa [ acl { acl-number | acl-name } ] } ^* }

undo ospf filter-lsa-out

Parameters

Parameter	Description	Value
all	Filters all outgoing LSAs except grace LSAs.	-
summary	Filters outgoing network summary LSAs (Type3).	-
ase	Filters outgoing AS external LSAs (Type5).	-
nssa	Filters outgoing NSSA LSAs (Type7).	-
acl acl-number	Specifies the number of the basic ACL.	The value is an integer that ranges from 2000 to 2999.
acl acl-name	Specifies the name of a named ACL.	The value is a string of 1 to 64 case-sensitive characters without spaces. The value must start with a letter.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When multiple links exist between two switches, you can run the ospf filter-lsa-out command to configure the local switch to filter the outgoing LSAs based on the filtering policy before the device sends these LSAs along specified links. This reduces the unnecessary retransmission of LSAs and saves bandwidth resources.

Configuration Impact

Filtering the outgoing LSAs on the specified OSPF interface can prevent useless LSAs from being sent to neighbors. This can reduce the size of the LSDB of neighbors and speed up the network convergence.

After the command is configured on an interface, the OSPF neighbor relationship of the interface will automatically re-establish.

When the rule in the ACL changes, the OSPF neighbor relationship of the interface will automatically re-establish.

Precautions

When the rule command is used to configure the filtering rules for an ACL configured using the acl command, only the source address range that is specified by the source parameter and the period of time that is specified by the time-range parameter take effect.

Grace LSAs are used to inform the neighbor of the Graceful Restart (GR) time, cause, and interface instance ID when GR starts and ends. The command is not used to filter the grace LSAs.

Example

# Configure VLANIF100 to filter all outgoing LSAs except grace LSAs.

<HUAWEI> system-view 
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] ospf filter-lsa-out all

# Configure GE0/0/1 to filter all outgoing LSAs except grace LSAs.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf filter-lsa-out all

ospf frr block

Function

The ospf frr block command disables the OSPF IP FRR function on a specified interface.

The undo ospf frr block command restores the OSPF IP FRR function on the specified interface.

By default, the OSPF IP FRR function is enabled on a specific interface.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI	Supported
S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

ospf frr block

undo ospf frr block

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF IP FRR can be disabled using the ospf frr block command on an interface of a specific device that is running important services and resides on an FRR backup link. This setting prevents the device connected to this interface from being a part of a backup link and being burdened after FRR switches traffic to the backup link.

Precautions

Before configuring the ospf frr block command on a specified interface, you must run the frr command and loop-free-alternate command in the OSPF view to enable OSPF IP FRR. This way prevents the link where the interface resides from being calculated as a backup link.

Example

# Disable the OSPF IP FRR function on the interface Vlanif10.

<HUAWEI> system-view

[HUAWEI] interface vlanif 10

[HUAWEI-Vlanif10] ospf frr block

Related Topics

ospf maxage-lsa auto-protect disable

Function

The ospf maxage-lsa auto-protect disable command disables master/slave board switching triggered by abnormal OSPF LSA aging.

The undo ospf maxage-lsa auto-protect disable command enables master/slave board switching triggered by abnormal OSPF LSA aging.

By default, master/slave board switching triggered by abnormal OSPF LSA aging is enabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf maxage-lsa auto-protect disable

undo ospf maxage-lsa auto-protect disable

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

If the local device clock is faster than usual and the aging timer expires abnormally, the local device incorrectly clears all Router LSAs from the peer device, which causes route flapping and service interruptions. To resolve this issue, master/slave board switching triggered by abnormal OSPF LSA aging is automatically enabled. Master/Slave board switching is triggered to restore network connections and service traffic when the following condition is met:

(Number of incorrectly cleared Router LSAs/Total number of Router LSAs) x 100% ≥ 80% (Router LSAs are those sent by the peer device to the local device)

Example

# Disable master/slave board switching triggered by abnormal OSPF LSA aging.

<HUAWEI> system-view

[HUAWEI] ospf maxage-lsa auto-protect disable

ospf mib-binding

Function

The ospf mib-binding command binds an OSPF process to SNMP and makes OSPF respond to SNMP requests.

The undo ospf mib-binding command disables the binding.

By default, OSPF processes are not bound to SNMP.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf mib-binding process-id

undo ospf mib-binding

Parameters

Parameter	Description	Value
process-id	Specifies an OSPF process ID.	The value is an integer ranging from 1 to 65535.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The OSPF MIB is a virtual database of the device status maintained by the managed devices.

When multiple OSPF processes are started, you can specify which OSPF process is processed by the OSPF MIB. That is, you can bind the OSPF MIB to a specified OSPF process.

Prerequisites

An OSPF process has been created using the ospf command in the system view.

Example

# Bind OSPF process 100 to SNMP.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] quit

[HUAWEI] ospf mib-binding 100

# Disable the binding.

<HUAWEI> system-view

[HUAWEI] undo ospf mib-binding

Related Topics

display ospf brief

ospf mtu-enable

Function

The ospf mtu-enable command enables the interface to fill in an MTU value when sending DD packets.

The undo ospf mtu-enable command restores the default settings.

By default, the MTU value is 0 when the interface sends DD packets. That is, the actual MTU value of the interface is not filled in.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf mtu-enable

undo ospf mtu-enable

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The default MTU value in a DD packet is 0. By using the command, you can manually configure the interface to fill in the actual MTU value when the interface sends the DD packet.

As different vendors may adopt different default MTU values, to keep consistency, you can configure an interface to use the default value 0 when the interface sends DD packets.

Precautions

OSPF does not support the configuration on a null interface.

After the command is configured, the system automatically restarts the OSPF process.

Example

# Set Vlanif100 to fill in the MTU field when sending DD packets.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf mtu-enable

# Set GigabitEthernet0/0/1 to fill in the MTU field when sending DD packets.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf mtu-enable

ospf network-type

Function

The ospf network-type command sets a network type for an OSPF interface.

The undo ospf network-type command restores the default network type of the OSPF interface.

By default, the network type of an interface is determined by the physical interface. The network type of Ethernet interfaces is broadcast.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf network-type { broadcast | nbma | p2mp | p2p [ peer-ip-ignore ] }

undo ospf network-type

Parameters

Parameter	Description	Value
broadcast	Indicates that the network type of the interface is changed to broadcast.	-
nbma	Indicates that the network type of the interface is changed to NBMA.	-
p2mp	Indicates that the network type of the interface is changed to point-to-multipoint.	-
p2p	Indicates that the network type of the interface is changed to point-to-point.	-
peer-ip-ignore	Disables network segment check when IP address unnumbering is not configured for a P2P interface changed from a broadcast interface and the interface tries to establish an OSPF neighbor relationship. By default, if peer-ip-ignore is not specified in the command, OSPF checks the network segment of the two ends during which an OSPF neighbor relationship is to be established. Specifically, OSPF performs an AND operation on the local subnet mask and the local IP address, and on the local subnet mask and the remote IP address. An OSPF neighbor relationship can be established only when the results on the two ends are the same.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When link layer protocols remain unchanged, you can change network types and configure OSPF features to flexibly build networks.

In the broadcast network, if there is a device that does not support multicast address, you can change the network type of the interface to NBMA.
If the network type of the interface is NBMA, when the interface type is changed to broadcast, neighbor relationships do not need to be configured.

The condition for changing an NBMA network to broadcast network is that there must be a direct virtual circuit between any two devices, and the network must be a full mesh network.

If a network does not meet the preceding conditions, you must change the type of network to point-to-multipoint. In this manner, two indirect devices can communicate with the help of one device directly connected to the two devices. Instead of configuring the neighboring device, you can change the network type of the interface to point-to-multipoint.

If there are only two devices that run OSPF in the same network segment, the network type of an interface can be changed to p2p.

Precautions

OSPF does not support the configuration on a null interface.
When the network type of an interface is NBMA or the network type of an interface is changed to NBMA manually, you must run the peer command to configure the neighbor.
Generally, the network type of two OSPF interfaces on both ends of the link must be identical. Otherwise, the two interfaces cannot set up the neighbor relationship.

Only when the network type of one OSPF interface is broadcast and the network type of the other OSPF interface is P2P or P2MP, the two interfaces can still set up the neighbor relationship, but cannot learn the OSPF routing information each other.

Example

# Set network type of VLANIF100 to NBMA.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf network-type nbma

# Set network type of GE0/0/1 to NBMA.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf network-type nbma

Related Topics

peer (OSPF)

ospf dr-priority

ospf p2mp-mask-ignore

Function

The ospf p2mp-mask-ignore command disables a device from checking the network mask on a Point-to-Multipoint (P2MP) network.

The undo ospf p2mp-mask-ignore command configures the device to check the network mask on a P2MP network.

By default, devices on a P2MP network do not check the network mask.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf p2mp-mask-ignore

undo ospf p2mp-mask-ignore

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

OSPF checks the network masks carried in Hello packets. If the network mask carried in a received Hello packet is not the same as the network mask of the local device, the Hello packet is discarded.

On a P2MP network, when the mask lengths of devices are different, you can use the ospf p2mp-mask-ignore command on devices to disable them from checking the network mask in Hello packets. In this manner, the OSPF neighbor relationship can be established.

Prerequisites

Because P2MP is not a link layer protocol, each P2MP network is forcibly changed from a network of another type. A common P2MP network is changed from a non-fully connected non-broadcast multiple access (NBMA) network through the ospf network-type p2mp command.

Example

# Disable a device from checking the network mask on a P2MP network.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf network-type p2mp

[HUAWEI-Vlanif100] ospf p2mp-mask-ignore

# Disable a device from checking the network mask on a P2MP network.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf network-type p2mp
[HUAWEI-GigabitEthernet0/0/1] ospf p2mp-mask-ignore

Related Topics

ospf network-type

ospf router-id auto-recover disable

Function

The ospf router-id auto-recover disable command disables a device from performing automatic recovery after detecting router ID conflict.

The undo ospf router-id auto-recover disable command enables a device to perform automatic recovery after detecting router ID conflict.

By default, a device performs automatic recovery after detecting router ID conflict.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf router-id auto-recover disable

undo ospf router-id auto-recover disable

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

If router ID conflict occurs in an OSPF area, the system can define a new router ID, preventing route flapping and reducing route calculation operations. Other protocols will not go Down when the CPU usage is controlled.

If the automatic recovery function is enabled and a router ID conflict occurs between indirectly connected routers in one OSPF area, the system replaces the conflicted router ID with a newly calculated one. The automatic recovery function takes effect on both configured and automatically generated router IDs.
The system can replace a router ID in a maximum of three attempts in case the router ID conflict persists.

Example

# Disable a device from performing automatic recovery after detecting router ID conflict.

<HUAWEI> system-view

[HUAWEI] ospf router-id auto-recover disable

ospf smart-discover

Function

The ospf smart-discover command enables smart-discover on an interface.

The undo ospf smart-discover command disables smart-discover on an interface.

By default, smart-discover is disabled on interfaces.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf smart-discover

undo ospf smart-discover

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

In normal situations, devices periodically send Hello packets through OSPF interfaces. By sending Hello packets, devices set up and maintain neighbor relationships, and elect the DR and BDR on the multi-access network (broadcast or NBMA network). When setting up neighbor relationships or electing the DR and BDR on the multi-access network, interfaces send Hello packets only when the Hello timer expires. This slows down the establishment of neighbor relationships and election of the DR and BDR.

After smart-discover is configured, when the status of the neighbor relationship changes or the DR and BDR on the multi-access network changes, the device sends Hello packets to its neighbor immediately without waiting for the expiration of the Hello timer.

Procedure

On broadcast and NBMA networks, neighbor relationships can be rapidly set up and a DR and a BDR can be rapidly elected.

When the neighbor status becomes 2-way for the first time or returns to Init from the 2-way or higher state, the smart-discover-enabled interface sends Hello packets to a neighbor without waiting for the expiration of the Hello timer when detecting that the neighbor status changes.
When the status of the interface functioning as the DR or BDR on the multi-access network changes, the smart-discover-enabled interface actively sends Hello packets on the network segment and then participates in the DR or BDR election.

The principle of setting up adjacencies rapidly on P2P or P2MP networks is the same as that on broadcast and NBMA networks.

Configuration Impact

The interval for sending Hello packets on an interface is determined by the interval for sending Hello packets set on the interface.

Precautions

The default interval for sending Hello packets varies with the network type.

Example

# Enable smart-discover on VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf smart-discover

# Enable smart-discover on GE0/0/1.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf smart-discover

ospf suppress-flapping peer

Function

The ospf suppress-flapping peer command configures detection parameters for OSPF neighbor relationship flapping suppression.

The undo ospf suppress-flapping peer command restores the default detection parameters.

By default, the detection interval of OSPF neighbor relationship flapping suppression is 60s, the suppression threshold is 10, and the interval for exiting from suppression is 120s.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf suppress-flapping peer { detecting-interval detecting-interval | threshold threshold | resume-interval resume-interval } ^*

undo ospf suppress-flapping peer { detecting-interval detecting-interval | threshold threshold | resume-interval resume-interval } ^*

Parameters

Parameter

Description

Value

detecting-interval detecting-interval

Specifies a detection interval for OSPF neighbor relationship flapping suppression.

Each OSPF interface on which OSPF neighbor relationship flapping suppression is enabled starts a flapping counter. If the interval between two successive neighbor status changes from Full to a non-Full state is shorter than detecting-interval, a valid flapping_event is recorded, and the flapping_count increases by 1.

The value is an integer ranging from 1 to 300, in seconds. The default value is 60s.

threshold threshold

Specifies the threshold of OSPF neighbor relationship flapping suppression.

When the flapping-count reaches or exceeds threshold, flapping suppression takes effect.

The value is an integer ranging from 1 to 1000. The default value is 10.

resume-interval resume-interval

Specifies an interval for exiting from OSPF neighbor relationship flapping suppression.

If the interval between two successive neighbor status changes from Full to a non-Full state is longer than resume-interval, the flapping-count is reset.

NOTE:

The value of resume-interval must be greater than that of detecting-interval.

The value is an integer ranging from 2 to 1000, in seconds. The default value is 120s.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To configure detection parameters for OSPF neighbor relationship flapping suppression on an interface, run the ospf suppress-flapping peer command. However, keeping the default configurations is recommended.

Prerequisites

OSPF neighbor relationship flapping suppression must have been enabled globally before you configure detection parameters for it. By default, the function is enabled. If it is disabled, run the undo suppress-flapping peer disable command to enable it before you configure the detection parameters.

Example

# Set the detection interval of OSPF neighbor relationship flapping suppression to 5s, the suppression threshold to 40, and the interval for exiting from suppression to 20s on VLANIF100.

<HUAWEI> system-view
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] ospf suppress-flapping peer detecting-interval 5 threshold 40 resume-interval 20

Related Topics

ospf suppress-flapping peer disable

Function

The ospf suppress-flapping peer disable command disables OSPF neighbor relationship flapping suppression on an interface.

The undo ospf suppress-flapping peer disable command enables OSPF neighbor relationship flapping suppression on an interface.

By default, OSPF neighbor relationship flapping suppression is enabled on all interfaces.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf suppress-flapping peer disable

undo ospf suppress-flapping peer disable

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

By default, OSPF neighbor relationship flapping suppression is enabled on all interfaces in the same OSPF process. To disable the function on one of the interfaces, run the ospf suppress-flapping peer disable command.

When an interface enters the flapping suppression state, all neighbor relationships on the interface enter the state accordingly.

Prerequisites

OSPF neighbor relationship flapping suppression must have been enabled globally before you enable the function on an interface using the undo ospf suppress-flapping peer disable command. By default, the function is enabled globally. If it is disabled, run the undo suppress-flapping peer disable command to enable it.

Example

# Disable OSPF neighbor relationship flapping suppression on VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf suppress-flapping peer disable

Related Topics

ospf suppress-flapping peer hold-down

Function

The ospf suppress-flapping peer hold-down command configures the Hold-down mode and sets a duration for this mode.

The undo ospf suppress-flapping peer hold-down command cancels the Hold-down mode.

By default, the Hold-down mode is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf suppress-flapping peer hold-down interval

undo ospf suppress-flapping peer hold-down [ interval ]

Parameters

Parameter	Description	Value
interval	Specifies a duration for the Hold-down mode.	The value is an integer ranging from 1 to 600, in seconds. The default value is 60.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Flapping suppression works in either Hold-down or Hold-max-cost mode.

Hold-down mode: In the case of frequent flooding and topology changes during neighbor relationship establishment, interfaces prevent neighbor relationship reestablishment during Hold-down suppression, which minimizes LSDB synchronization attempts and packet exchanges.
Hold-max-cost mode: If the traffic forwarding path changes frequently, interfaces use 65535 as the cost of the flapping link during Hold-max-cost suppression, which prevents traffic from passing through the flapping link.

Flapping suppression can also work first in Hold-down mode and then in Hold-max-cost mode.

By default, the Hold-max-cost mode takes effect. To configure the Hold-down mode and set a duration for this mode, run the ospf suppress-flapping peer hold-down command.

Prerequisites

OSPF neighbor relationship flapping suppression must have been enabled globally before you configure the Hold-down mode and set a duration for this mode. By default, the function is enabled. If it is disabled, run the undo suppress-flapping peer disable command to enable it.

Example

# Configure the Hold-down mode and set its duration to 200s on VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf suppress-flapping peer hold-down 200

Related Topics

ospf suppress-flapping peer hold-max-cost disable

Function

The ospf suppress-flapping peer hold-max-cost disable command disables the Hold-max-cost mode.

The undo ospf suppress-flapping peer hold-max-cost disable command enables the Hold-max-cost mode.

By default, the Hold-max-cost mode is enabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf suppress-flapping peer hold-max-cost disable

undo ospf suppress-flapping peer hold-max-cost disable

Parameters

None

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Flapping suppression works in either Hold-down or Hold-max-cost mode.

Hold-down mode: In the case of frequent flooding and topology changes during neighbor relationship establishment, interfaces prevent neighbor relationship reestablishment during Hold-down suppression, which minimizes LSDB synchronization attempts and packet exchanges.
Hold-max-cost mode: If the traffic forwarding path changes frequently, interfaces use 65535 as the cost of the flapping link during Hold-max-cost suppression, which prevents traffic from passing through the flapping link.

Flapping suppression can also work first in Hold-down mode and then in Hold-max-cost mode.

By default, the Hold-max-cost mode takes effect. To configure the Hold-down mode and set a duration for this mode, run the ospf suppress-flapping peer hold-down interval command.

Prerequisites

OSPF neighbor relationship flapping suppression must have been enabled globally before you configure duration for the Hold-max-cost mode. By default, the function is enabled. If it is disabled, run the undo suppress-flapping peer disable command to enable it.

Precautions

The Hold-max-cost mode takes effect only unidirectionally. If a remote device does not support OSPF neighbor relationship flapping suppression, bidirectional traffic between the local and remote devices may travel along different paths.

Example

# Disable the Hold-max-cost mode on VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf suppress-flapping peer hold-max-cost disable

Related Topics

ospf suppress-flapping peer hold-down

ospf timer dead

Function

The ospf timer dead command sets a dead interval after which an interface considers its OSPF neighbor invalid.

The undo ospf timer dead command restores the default dead interval of the neighbor.

By default, for a P2P or broadcast interface, the dead interval for OSPF neighbors is 40 seconds; for an NBMA or P2MP interface, it is 120 seconds.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf timer dead interval

undo ospf timer dead

Parameters

Parameter	Description	Value
interval	Specifies the dead interval of the OSPF neighbors.	The value is an integer ranging from 1 to 235926000, in seconds. Setting the dead interval of an OSPF neighbor to be longer than 20s is recommended.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If an interface does not receive any Hello packet from its neighbor within the dead interval, the interface considers its neighbor invalid. The dead interval on an OSPF interface must be greater than the transmission interval of Hello messages. In addition, the dead intervals of devices on the same network segment must be the same.

By default, the dead interval of OSPF neighbors is four times the transmission interval of Hello messages.

Precautions

OSPF does not support the configuration on a null interface.

If the dead interval of an OSPF neighbor is shorter than 20s, the session may be closed. Therefore, if dead interval is shorter than 20s, the actual dead interval of an OSPF neighbor is not shorter than 20s.

Example

# Set the dead interval on VLANIF100 to 60 seconds.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf timer dead 60

# Set the dead interval on GE0/0/1 to 60 seconds.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf timer dead 60

Related Topics

ospf timer hello

Function

The ospf timer hello command sets an interval for sending Hello packets on an interface.

The undo ospf timer hello command restores the default value of the interval.

By default, for a P2P or broadcast interface, the interval for sending Hello packets is 10 seconds; for an NBMA or P2MP interface, it is 30 seconds.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf timer hello interval [ conservative ]

undo ospf timer hello

Parameters

Parameter	Description	Value
interval	Specifies an interval for sending the Hello packet on an interface.	The value is an integer ranging from 1 to 65535, in seconds. Setting interval to be longer than or equal to 5s is recommended.
conservative	Indicates the conservative mode of the dead timer. If the conservative mode is configured, the value configured for the dead timer using the ospf timer dead command takes effect even when the value is less than 20s.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Hello packets are periodically sent on OSPF interfaces to establish and maintain neighbor relationships. A Hello packet contains information about timers, DRs, BDRs, and known neighbors.

The smaller the hello interval is, the faster the changing speed of the network topology is. The cost of routes, however, becomes greater. Ensure that the parameters of this interface and the adjacent routers are consistent.

Precautions

OSPF does not support the configuration on a null interface.

If hello interval is set but a dead interval is not set using the ospf timer dead command, the dead interval of an OSPF neighbor is four times the value of hello interval. If the dead interval of an OSPF neighbor is shorter than 20s, the session may be closed. Therefore, if hello interval is shorter than 5s, the actual dead interval of an OSPF neighbor is not shorter than 20s.

Example

# Set the interval for sending Hello packets on VLANIF100 to 20 seconds.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf timer hello 20

# Set the interval for sending Hello packets on GE0/0/1 to 20 seconds.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf timer hello 20

Related Topics

ospf timer dead

ospf timer poll

Function

The ospf timer poll command sets a poll interval for sending Hello packets on NBMA networks.

The undo ospf timer poll command restores the default poll interval.

By default, it is 120 seconds.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf timer poll interval

undo ospf timer poll

Parameters

Parameter	Description	Value
interval	Specifies the poll interval for sending Hello packets.	The value is an integer ranging from 1 to 3600, in seconds.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On an NBMA network, after a device's neighbor becomes invalid, the device periodically sends Hello packets to the neighbor according to the poll interval set in the ospf timer poll command. The poll interval should be at least 4 times that of the Hello interval.

Precautions

OSPF does not support the configuration on a null interface.

Example

# Set the poll interval for sending Hello packets on VLANIF100 to 130 seconds.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf timer poll 130

# Set the poll interval for sending Hello packets on GE0/0/1 to 130 seconds.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf timer poll 130

ospf timer retransmit

Function

The ospf timer retransmit command sets an interval for retransmitting LSA on an interface.

The undo ospf timer retransmit command restores the default interval for retransmitting LSA on an interface.

By default, the interval time is 5 seconds.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf timer retransmit interval

undo ospf timer retransmit

Parameters

Parameter	Description	Value
interval	Specifies interval for retransmitting LSA on an interface.	The value is an integer ranging from 1 to 3600, in seconds.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a device transmits an LSA to its neighbor, it has to wait for the ACK packet from the neighbor. If no ACK packet is received from the neighbor in the LSA retransmission interval, this LSA is retransmitted.

Do not set LSA retransmission intervals too short between adjacent routers. Otherwise, it leads to unnecessary retransmission.

Precautions

OSPF does not support the configuration on a null interface.

Example

# Specify the interval for retransmitting LSAs between VLANIF100 and the adjacent device to 8 seconds.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf timer retransmit 8

# Specify the interval for retransmitting LSAs between GE0/0/1 and the adjacent device to 8 seconds.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf timer retransmit 8

ospf trans-delay

Function

The ospf trans-delay command adds a transmission delay to LSAs before they are sent by an interface.

The undo ospf trans-delay command restores the default transmission delay of LSAs on an interface.

By default, the transmission delay is 1 second.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf trans-delay interval

undo ospf trans-delay

Parameters

Parameter	Description	Value
interval	Specifies a transmission delay to be added to LSAs before they are sent by an interface.	The value is an integer ranging from 1 to 500, in seconds.

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

LSAs age (increase by 1 each second) in LSDBs but do not age during transmission in the network. To ensure that the aging time of LSAs transmitted to the remote device is correct, run the ospf trans-delay command to add a transmission delay to LSAs before they are sent by a local interface. This configuration is especially important to low-speed networks.

Precautions

OSPF does not support the configuration on a null interface.

Example

# Add a transmission delay of 3 seconds to LSAs before they are sent by a VLANIF100.

<HUAWEI> system-view

[HUAWEI] interface vlanif 100

[HUAWEI-Vlanif100] ospf trans-delay 3

# Add a transmission delay of 3 seconds to LSAs before they are sent by a GE0/0/1.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ospf trans-delay 3

ospf valid-ttl-hops

Function

The ospf valid-ttl-hops command enables OSPF GTSM and sets a TTL value to be checked.

The undo ospf valid-ttl-hops command disables OSPF GTSM.

By default, OSPF GTSM is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

ospf valid-ttl-hops hops [ nonstandard-multicast ] [ vpn-instance vpn-instance-name ]

undo ospf valid-ttl-hops [ hops [ nonstandard-multicast ] ] [ vpn-instance vpn-instance-name ]

Parameters

Parameter	Description	Value
hops	Specifies a TTL value to be checked.	The value is an integer that ranges from 1 to 255. The default value is 255.
nonstandard-multicast	Specifies the GTSM configuration is also valid for multicast packets. When the nonstandard-multicast parameter is configured: The TTL values of the multicast packets which will be sent are set as 255. The received multicast packets will be checked for the TTL value 1 or in the range of [ 255-hops+1, 255 ].	-
vpn-instance vpn-instance-name	Specifies the name of a VPN instance. If the parameter is specified, only the TTL value of the packets in the specified VPN instance needs to be checked.	The value must be an existing VPN instance name.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

In a network demanding higher security, you can enable GTSM to improve the security of the OSPF network. GTSM defends against attacks by checking the TTL value. If an attacker simulates and keeps sending OSPF unicast packets to a switch, the switch receives and directly sends the packets to the main control board for OSPF processing, without checking the validity of the packets. In this case, the switch is busy processing these packets, causing high CPU usage. GTSM protects the switches and enhances the system security by checking whether the TTL value in the IP packet header is within a pre-defined range.

The ospf valid-ttl-hops command is used to enable OSPF GTSM. To check the TTL value of packets that match the GTSM policy, the vpn-instance parameter must be specified in the command.

For example, running the ospf valid-ttl-hops command enables OSPF GTSM on both the public network and the private network. If you run the ospf valid-ttl-hops 5 vpn-instance vpn1 command:

OSPF GTSM is enabled on both the public network and the private network.
The TTL value of OSPF packets in the VPN instance named vpn1 is detected.
The default action is performed for packets that are from the public network and other VPN instances and do not match the GTSM policy.

Precautions

If a VPN instance is specified in the ospf valid-ttl-hops command and the interface is bound to the VPN instance, all the unicast packets sent to this interface are dropped when the set number of TTL hops is smaller than the actual number of hops on the network.
If a virtual link or sham link is configured, the actual TTL value and the configured TTL value must be the same. That means that the number of virtual links or sham links that pass through the switch is calculated. Otherwise, packets sent from neighbors of a virtual link or a sham link will be dropped.
GTSM only checks the TTL values of the packets that match the GTSM policy. If the packets do not match the GTSM policy, you can set the pass parameter or drop parameter in the gtsm default-action command to pass or drop these packets.
If only a private or public network policy is configured, run the gtsm default-action command to set the default behavior for processing the packets unmatched with the GTSM policy to pass to prevent the OSPF packets of other instances from being discarded.

Example

# Enable OSPF GTSM. Set the maximum number of TTL hops to 5 for the packets that can be received from the public network.

<HUAWEI> system-view

[HUAWEI] ospf valid-ttl-hops 5

Related Topics

gtsm default-action

gtsm log drop-packet all

p2mp-peer

Function

The p2mp-peer command sets a cost for an OSPF route to a specified neighbor on a P2MP network.

The undo p2mp-peer command restores the default value.

By default, the cost of an OSPF route to a neighbor in a P2MP network equals the interface cost.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

p2mp-peer ip-address cost cost

undo p2mp-peer ip-address

Parameters

Parameter	Description	Value
ip-address	Specifies the IP address of a neighbor on a P2MP network.	The value is in dotted decimal notation.
cost cost	Sets a cost for an OSPF route to a specified neighbor on a P2MP network.	The value is an integer ranging from 1 to 65535.

Views

OSPF process view

Default Level

2: Configuration level

Usage Guidelines

By default, the cost of an OSPF route to a neighbor equals the interface cost on a P2MP network. If this default cost is not suitable, run the p2mp-peer command to set a desired cost.

The interface cost calculation formula is as follows: Cost of an interface = Bandwidth reference value/Interface bandwidth. The integer of the calculated result is used as the interface cost, and 1 is used as the interface cost if the calculated result is smaller than 1. The bandwidth reference value is set using the bandwidth-reference command, with the default value being 100 Mbit/s.

Example

# Set the cost to 100 for the OSPF route to the neighbor 10.1.1.1 in OSPF process 100 on a P2MP network.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] p2mp-peer 10.1.1.1 cost 100

peer (OSPF)

Function

The peer command sets an IP address and a DR priority for the adjacent switch on an NBMA network.

The undo peer command cancels the IP address of the adjacent switch on an NBMA network.

By default, the IP address and DR priority for the adjacent switch on an NBMA network are not set.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

peer ip-address [ dr-priority priority ]

undo peer ip-address

Parameters

Parameter	Description	Value
ip-address	Specifies an IP address for the adjacent switch.	The value is in dotted decimal notation.
dr-priority priority	Sets a DR priority for the adjacent switch.	The value of the priority is an integer that ranges from 0 to 255. By default, it is 1.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

On an NBMA network (such as an X.25 or FR network), the entire network can be fully meshed based on the mapping configuration. This means that there is a virtual link between any two devices. In this case, the network running OSPF can be considered as a broadcast network where a DR or a BDR can be selected. However, you must run the peer command to manually specify an IP address and a DR priority for an adjacent switch. This is necessary because it is impossible to find the adjacent devices dynamically by broadcasting Hello packets.

Example

# Set the IP address of the adjacent switch to 10.1.1.1 on an NBMA network.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] peer 10.1.1.1

Related Topics

display ospf peer

display ospf interface

preference (OSPF)

Function

The preference command sets a preference for an OSPF route.

The undo preference command restores the default preference of OSPF routes.

By default, the preference of OSPF routes is 10 and that of ASE routes is 150.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

preference [ ase ] { preference | route-policy route-policy-name } ^*

undo preference [ ase ]

Parameters

Parameter	Description	Value
ase	Indicates the preference of an AS external route.	-
preference	Specifies the preference of an OSPF route. The smaller the preference value, the higher the preference.	The value is an integer ranging from 1 to 255.
route-policy route-policy-name	Specifies the name of a route policy.	The name is a string of 1 to 40 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Multiple dynamic routing protocols can run on a switch at the same time. This creates a problem of route sharing and selecting among routing protocols. The system sets a default preference for each routing protocol. If different protocols have routes to the same destination, the protocol with a higher preference is selected to forward IP packets. To set a preference for an OSPF route, run the preference command.

You can create a route-policy to set a preference for a specific route by setting the route-policy parameter in the preference command:

If the apply preference clause is configured for the route-policy, route preference is determined as follows:
- Route matching the route-policy: Its preference is determined by the apply clause.
- Route that does not match the route-policy: Its preference is determined by the preference command.
In the following example, the preference of the route matching the route-policy abc is set to 50 and the preference of the route that does not match the route-policy is set to 30.
```
#
route-policy abc permit node 1
 if-match cost 20
 apply preference 50
#
ospf 1
 preference 30 route-policy abc
```
If the apply preference clause is not included in the route-policy, the preference of routes is set by the preference command.

In the above example, if the apply preference 50 clause is not included in the policy abc, the preference of all routes is set to 30.

Configuration Impact

When there are routes discovered by multiple routing protocols on the same switch, you can make the switch prefer OSPF routes by setting a high preference for them.

Precautions

Example

# Set the preference of routes in OSPF process 100 to 150.

<HUAWEI> system-view

[HUAWEI] ospf 100

[HUAWEI-ospf-100] preference 150

# Set the preference of external routes in OSPF process 200 to 130.

<HUAWEI> system-view

[HUAWEI] ospf 200

[HUAWEI-ospf-200] preference ase 130

Related Topics

route-policy

prefix-priority (OSPF)

Function

The prefix-priority command sets a convergence priority for OSPF routes.

The undo prefix-priority command restores the default convergence priority of OSPF routes.

By default, the convergence priority of public 32-bit host routes is medium, and the convergence of other OSPF routes is low.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

prefix-priority { critical | high | medium } ip-prefix ip-prefix-name

undo prefix-priority { critical | high | medium }

Parameters

Parameter	Description	Value
critical	Sets the convergence priority of OSPF routes to critical.	-
high	Sets the convergence priority of OSPF routes to high.	-
medium	Sets the convergence priority of OSPF routes to medium.	-
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The prefix-priority command sets a convergence priority for OSPF routes according to a specified IP prefix list name. It takes effect on the public network only.

After the prefix-priority command is run in the OSPF view, OSPF route calculation, link-state advertisement (LSA) flooding, and LSDB synchronization can be implemented according to the configured priority, which accelerates route convergence.

Prerequisites

An IP prefix list has been created using the ip ip-prefix command in the system view.

Configuration Impact

When an LSA meets multiple priorities, the highest priority takes effect.

With the prefix-priority command, OSPF can calculate and flood LSAs, and synchronize LSDBs according to priorities. This speeds up route convergence. OSPF calculates LSAs in the sequence of intra-area routes, inter-area routes, and AS external routes. This command makes OSPF calculate the three types of routes separately according to the specified route calculation priorities. Convergence priorities are critical, high, medium, and low. To speed up the processing of LSAs with the higher priority, during LSA flooding, the LSAs need to be placed into the corresponding critical, high, medium, and low queues according to priorities.

Precautions

By default, the convergence priorities of public OSPF host routes, direct routes, static routes, and other protocol (such as BGP and RIP) routes are medium, high, medium, and low respectively. In the public network, OSPF 32-bit host routes are uniformly identified as medium.

Example

# Set the convergence priority of OSPF routes of 10.0.0.0/8 to critical.

<HUAWEI> system-view

[HUAWEI] ip ip-prefix critical-prefix index 10 permit 10.0.0.0 8

[HUAWEI] ospf 1

[HUAWEI-ospf-1] prefix-priority critical ip-prefix critical-prefix

Related Topics

ip ip-prefix

reset gtsm statistics

Function

The reset gtsm statistics command clears GTSM statistics.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

reset gtsm statistics all

Parameters

Parameter	Description	Value
all	Clears GTSM statistics.	-

Views

User view

Default Level

3: Management level

Usage Guidelines

Before collecting the GTSM statistic within a certain period, you need to clear the existing statistics.

Example

# Clear GTSM statistics.

<HUAWEI> reset gtsm statistics all

Related Topics

display gtsm statistics

reset ospf counters

Function

The reset ospf counters command resets OSPF counters.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

reset ospf [ process-id ] counters [ neighbor [ interface-type interface-number ] [ router-id ] ]

Parameters

Parameter	Description	Value
process-id	Indicates an OSPF process ID. If the parameter is not specified, all OSPF processes are restarted.	The value is an integer ranging from 1 to 65535.
neighbor	Specifies neighbor information of an interface.	-
interface-type interface-number	Specifies the type and the number of an interface.	-
router-id	Specifies the router ID of the neighbor.	The value is in dotted decimal notation.

Views

User view

Default Level

3: Management level

Usage Guidelines

When the switch restarts an OSPF process, the neighboring switch always reserves invalid LSAs. This occupies the memory of the system. These LSAs are deleted only when they expire, which happens when the LS age field in the LSA reaches 3600 seconds. After the reset ospf is used to restart an OSPF process and only when the router ID is changed, the switch generates an LSA in the set time and sets the LS age field to 3600 seconds. After receiving the LSA, other switches delete the LSA immediately from their LSDBs. If a switch does not send all the LSAs within the set time, other neighboring switches still store some invalid LSAs.

Clearing OSPF statistics does not affect the normal operation of OSPF services.

Once deleted, statistics cannot be restored. Therefore, exercise caution when deleting statistics.

Example

# Reset OSPF counters.

<HUAWEI> reset ospf counters

reset ospf process

Function

The reset ospf process command restarts an OSPF process.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

reset ospf [ process-id ] process [ flush-waiting-timer time | graceful-restart ]

Parameters

Parameter	Description	Value
process-id	Indicates an OSPF process ID. If the parameter is not specified, all OSPF processes are restarted.	The value is an integer ranging from 1 to 65535.
flush-waiting-timer time	Specified the time when the LSA is generated. The parameter takes effect only when it is set.	The value is an integer that ranges from 1 to 40, in seconds.
graceful-restart	Indicates that graceful restart is enabled.	-

Views

User view

Default Level

3: Management level

Usage Guidelines

Usage Scenario

The reset ospf process command can be used to clear OSPF information to reset the board.

If OSPF connections are reset, OSPF neighbor relationships will be interrupted and the original information cannot be restored. Exercise caution before running the reset ospf process command.

Configuration Impact

After the reset ospf process command is used to restart OSPF, the following situations may occur:

If a router ID is changed, a new router ID will take effect after the command is run.
Re-elect a DR and BDR.
OSPF configuration will not be lost after OSPF restarts.

Precautions

Configuring the flush-waiting-timer parameter when OSPF starts allows you to clear invalid LSAs within the set time before LSAs time out.

Whether all invalid LSAs on other switches can be deleted depends on the set time.

When the switch restarts an OSPF process, the neighboring switch always reserves invalid LSAs. This occupies the memory of the system. These LSAs are deleted only when they expire, which happens when the LS age field in the LSA reaches 3600 seconds. After the reset ospf is used to restart an OSPF process and only when the router ID is changed, the switch generates an LSA in the set time and sets the LS age field to 3600 seconds. After receiving the LSA, other switches delete the LSA immediately from their LSDBs. If a device does not send all the LSAs within the set time, other neighboring switches still store some invalid LSAs.

Example

# Restart all OSPF processes.

<HUAWEI> reset ospf process
Warning: The OSPF process will be reset. Continue? [Y/N]: y

reset ospf redistribution

Function

The reset ospf redistribution command re-imports OSPF routes.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

reset ospf [ process-id ] redistribution

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process. If this parameter is not specified, all OSPF processes are restarted.	The value is an integer that ranges from 1 to 65535.

Views

User view

Default Level

3: Management level

Usage Guidelines

The reset ospf redistribution command re-imports OSPF routes to generate Type 5 or Type 7 LSAs.

Example

# Re-import OSPF routes in OSPF process 1.

<HUAWEI> reset ospf 1 redistribution

reset ospf suppress-flapping peer

Function

The reset ospf suppress-flapping peer command forces an interface to exit from OSPF neighbor relationship flapping suppression.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

reset ospf process-id suppress-flapping peer [ interface-type interface-number ] [ notify-peer ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies an interface type and number.	-
notify-peer	Instructs neighbors to exit from OSPF neighbor relationship flapping suppression too.	-

Views

User view

Default Level

3: Management level

Usage Guidelines

Interfaces exit from flapping suppression in any of the following scenarios:

The suppression timer expires.
The corresponding OSPF process is reset.
The reset ospf suppress-flapping peer command is run.
OSPF neighbor relationship flapping suppression is disabled globally using the suppress-flapping peer disable command in the OSPF view.

If notify-peer is specified when the reset ospf suppress-flapping peer command is run on a device, the device sends Hello packets in which HelloInterval and RouterDeadInterval are 0s to its neighbors to instruct the neighbors to exit from OSPF neighbor relationship flapping suppression too. If the neighbors fail to receive such Hello packets, the function of notify-peer does not take effect. To force the neighbors to exit from OSPF neighbor relationship flapping suppression, run the reset ospf suppress-flapping peer command on them.

Example

# Force interfaces to exit from OSPF neighbor relationship flapping suppression.

<HUAWEI> reset ospf 1 suppress-flapping peer

Related Topics

display ospf retrans-queue

retransmission-limit

Function

The retransmission-limit command enables retransmission limit and sets the maximum number of retransmissions.

The undo retransmission-limit command disables retransmission limit.

By default, retransmission limit is disabled.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI, S6720LI, S6720S-LI, S5720LI, S5720S-LI, S2720EI, S1720X-E, S1720GW-E, S1720GWR-E, S1720GW, S1720GWR, S1720X	Supported
S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S1720GFR	Not supported

Format

retransmission-limit [ max-number ]

undo retransmission-limit

Parameters

Parameter	Description	Value
max-number	Indicates the maximum number of retransmissions.	The value is an integer that ranges from 2 to 255. The default value is 30.

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The retransmission-limit command can be used to enable Retransmission Limitation for OSPF (RL-for OSPF) to prevent dead loops caused by repeated transmissions if neighbors cannot receive packets.

Configuration Impact

The OSPF retransmission limit can be used in the following packets:

DD packets
LSU packets
LSR packets

Limit the maximum number of retransmissions. If the preceding three types of packets cannot be responded within the allowed retransmission times, disconnect neighbor relationships.

Example

# Enable OSPF retransmission limit and set the maximum number of retransmissions to 40.

<HUAWEI> system-view
[HUAWEI] ospf 1
[HUAWEI-ospf-1] retransmission-limit 40

Related Topics

display ospf cumulative

display ospf error

route-tag

Function

The route-tag command sets a tag value for imported VPN routes.

The undo route-tag command restores the default setting.

By default, the tag value of a VPN route is calculated based on the AS number of BGP. If no BGP is configured, the default tag value is 0.

Product	Support
S6720EI, S6720S-EI, S5720HI, S5720EI, S6720SI, S6720S-SI, S5730SI, S5730S-EI, S5720SI, S5720S-SI	Supported
S6720LI, S6720S-LI, S5720LI, S5720S-LI, S5710-X-LI, S5700LI, S5700S-LI, S2750EI, S2720EI, S1720GFR, S1720GW-E, S1720GWR-E, S1720X-E, S1720GW, S1720GWR, S1720X	Not supported

Format

route-tag { tag | disable }

undo route-tag

Parameters

Parameter	Description	Value
tag	Specifies the tag value of the imported VPN routes.	The value is an integer ranging from 0 to 4294967295.
disable	Disables a device from using a VPN route tag to detect loops.	-

Views

OSPF view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The route-tag command can be used only in VPN scenarios to prevent loops on Type-5 and Type-7 LSAs when a CE is dual-homed to two PEs.

In a networking where a CE is dual-homed to two PEs, PE1 generates Type-5 and Type-7 LSAs based on the imported BGP routes and sends the LSAs to the CE, then to PE2. Because OSPF routes have higher priorities over BGP routes, OSPF routes will replace BGP routes on PE2, causing loops. After the route-tag command is run, if the tag value of the PE and an LSA are the same, the PE will neglect the LSA, and a loop is prevented.

By default, the first two bytes of the tag value are fixed as 0xD000, while the last two bytes are the AS number of the local BGP. If a BGP AS number is greater than 65535, the default tag 0 is used. You can use the command to change the tag in this case.

Precautions

Configuring the same VPN route tag on the PEs within the same area is recommended.
Different OSPF processes can be configured with the same VPN route tag.

The tags set by the route-tag command or other commands are different only in preference.

The preference of the tag configured using the import-route command is the highest.
The preference of the tag configured using the route-tag command is medium.
The preference of the tag configured using the default tag command is the lowest.

Example

# Set the route tag for OSPF process 100 to 100 in a VPN instance named huawei.

<HUAWEI> system-view

[HUAWEI] ip vpn-instance huawei

[HUAWEI-vpn-instance-huawei] route-distinguisher 100:1

[HUAWEI-vpn-instance-huawei-af-ipv4] quit

[HUAWEI-vpn-instance-huawei] quit

[HUAWEI] ospf 100 vpn-instance huawei

[HUAWEI-ospf-100] route-tag 100

Related Topics