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Support Documentation

Command Reference

S7700 and S9700 V200R011C10

This document describes all the configuration commands of the device, including the command function, syntax, parameters, views, default level, usage guidelines, examples, and related commands.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
IPv4 IS-IS Configuration Commands

IPv4 IS-IS Configuration Commands

Command Support

For details about command support, see the description of each command. If no command support information is provided, all switch models support the command by default.

adjacency-strict-check enable

Function

The adjacency-strict-check enable command enables IS-IS adjacency strict-check.

The undo adjacency-strict-check enable command disables IS-IS adjacency strict-check.

The adjacency-strict-check disable command disables IS-IS adjacency strict-check.

By default, IS-IS adjacency strict-check is disabled when IS-IS establishes neighbor relationships.

Format

adjacency-strict-check enable

undo adjacency-strict-check [ enable ]

adjacency-strict-check disable

Parameters

None

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

During the establishment of IS-IS neighbor relationships, if both IPv4 and IPv6 are configured at both ends, both IPv4 and IPv6 neighbors are established. By default, IPv4 and IPv6 share the standard topology. When the faulty link is restored, IPv4 goes Up faster than IPv6. After the IS-IS router receives a message indicating that IPv4 goes Up, it considers that both IPv4 and IPv6 neighbors are established. If IPv6 packets are being transmitted at that time, some of these IPv6 packets are discarded.

To resolve this problem, run the adjacency-strict-check enable command to enable IS-IS adjacency strict-check to ensure that an IS-IS neighbor is established only when both IPv4 and IPv6 go Up.

Prerequisites

You have created an IS-IS process and entered the IS-IS view using the isis command.

Configuration Impact

After you run the adjacency-strict-check enable command on a broadcast network, the basic topology becomes Down if the IP protocol enabled on the local router is different from that on its neighbors.

After you run the adjacency-strict-check enable command on a P2P network, neighbor relationships cannot be established if the IP protocol enabled on the local router is different from that on its neighbors and only the basic topology is available for the local router.

Precautions

undo adjacency-strict-check [ enable ] and undo adjacency-strict-check commands have the same function, enable is just provide convenience for users.

Example

# Enable adjacency strict-check on IS-IS process 1.

<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] adjacency-strict-check enable
Related Topics

area-authentication-mode

Function

The area-authentication-mode command configures an IS-IS area to authenticate received Level-1 packets (LSPs and SNPs) using the specified authentication mode and password or adds authentication information to Level-1 packets to be sent.

The undo area-authentication-mode command restores the default configuration.

By default, the system neither encapsulates generated Level-1 packets with authentication information nor authenticates received Level-1 packets.

Format

area-authentication-mode { { simple { plain plain-text | [ cipher ] plain-cipher-text } | md5 { [ cipher ] plain-cipher-text | plain plain-text } } [ ip | osi ] | { keychain keychain-name } } [ snp-packet { authentication-avoid | send-only } | all-send-only ]

area-authentication-mode hmac-sha256 key-id key-id { plain plain-text | [ cipher ] plain-cipher-text } [ snp-packet { authentication-avoid | send-only } | all-send-only ]

undo area-authentication-mode

Parameters

Parameter Description Value
simple Transmits the password in plain text.
NOTICE:

Simple authentication has potential risks. HMAC-SHA256 cipher text authentication is recommended.

 -
plain plain-text Specifies the authentication password in plain text. You can enter only the password in plain text. When you view the configuration file, the password is displayed in plain text.
NOTICE:

If plain is selected, the password is saved in the configuration file in plain text. This brings security risks. It is recommended that you select cipher to save the password in cipher text.

 The value is a string of case-sensitive characters without spaces. The value contains digits and letters. When the authentication mode is simple, the value is a string of 1 to 16 characters. When the authentication mode is md5 or hmac-sha256, the value is a string of 1 to 255 characters.
cipher plain-cipher-text Specifies the authentication password in cipher text. You can enter the password in plain or cipher text. When you view the configuration file, the password is displayed in cipher text. By default, the password is in cipher text. The value is a string of case-sensitive characters without spaces. The value contains digits and letters. When the authentication mode is simple, the value is a string of 1 to 16 characters in plain text or a string of 32 or 48 characters in cipher text. When the authentication mode is md5 or hmac-sha256, 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 Transmits the password that is encrypted using MD5.
NOTICE:

MD5 authentication has potential risks. HMAC-SHA256 cipher text authentication is recommended.

 -
ip Indicates the IP authentication password. This parameter cannot be configured when keychain authentication is used. -
osi Indicates the OSI authentication password. This parameter cannot be configured when keychain authentication is used. When neither osi nor ip is specified, the default parameter osi is used. -
keychain keychain-name Indicates the keychain that changes with time and is encrypted using MD5. This parameter takes effect only when keychain-name is set using the keychain command. 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.
snp-packet Authenticates SNPs. -
authentication-avoid Encapsulates generated LSPs but not SNPs with authentication information and authenticates received LSPs but not SNPs. -
send-only Encapsulates generated LSPs and SNPs with authentication information, and authenticates received LSPs but not SNPs. -
all-send-only Encapsulates generated LSPs and SNPs with authentication information, but does not authenticate received LSPs and SNPs. -
hmac-sha256 Encapsulates generated packets with the HMAC-SHA256 authentication and a password encrypted by the HMAC-SHA256 algorithm and authenticates received packets. -
key-id key-id Indicates key ID of the HMAC-SHA256 algorithm. It is an integer ranging from 0 to 65535.

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Generally, the IS-IS packets to be sent are not encapsulated with authentication information, and the received packets are not authenticated. If a user sends malicious packets to attack a network, information on the entire network may be stolen. Therefore, you can configure IS-IS authentication to improve the network security.

The area authentication password is encapsulated into Level-1 IS-IS packets. Only the packets that pass the area authentication can be accepted. Therefore, you can configure IS-IS area authentication to authenticate the Level-1 area.

Precautions

The area-authentication-mode command is valid only on Level-1 or Level-1-2 routers.

By using this command enables IS-IS to discard all the Level-1 LSPs and SNPs whose area authentication passwords are not consistent with the one set by this command. At the same time, IS-IS inserts the configured area authentication password into all the Level-1 routing packets (LSPs and SNPs) sent from the local node. The establishment of the Level-1 neighbor relationship is not affected, regardless of whether the packets pass the area authentication.

The authentication takes effect only on the peer configured with authentication. The peer with no authentication configured can still receive the LSP and SNP packet with the password.

Example

# Set the area authentication mode to keychain and keychain name to huawei.

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] area-authentication-mode keychain huawei

attached-bit advertise

Function

The attached-bit advertise command configures a rule for setting the ATT bit in Link state Protocol Data Units (LSPs).

The undo attached-bit advertise command restores the default setting rule.

By default, the Level-1-2 device sets the ATT bit in LSPs using the default rule.

Format

attached-bit advertise { always | never }

undo attached-bit advertise

Parameters

Parameter Description Value
always Indicates that the ATT bit is set to 1. -
never Indicates that the ATT bit is set to 0. -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

An ATT bit is a field in link state packets. An ATT bit identifies whether Level-1 area is attached to other areas. A Level-1-2 device sets the ATT bit to 1 to notify the devices in Level-1 area of its attachment to a Level-2 backbone area. After a Level-1 device receives the LSPs carrying the ATT bit 1 from the Level-1-2 device, the Level-1 device generates a route with the same destination address as the default route of the Level-1-2 device. Traffic can be forwarded along this route.

The preceding rule is the default rule for setting the ATT bit in the Intermediate System to Intermediate System (IS-IS) protocol. You can run the attached-bit advertise command to configure a rule for setting the ATT bit as required.

  • If you want the ATT bit in LSPs to be set to 1, run the attached-bit advertise always command.

  • If you want to disable the Level-1 device connected to the Level-1-2 device from advertising default routes when the ATT bit is set to 1, run either of the following commands:

    • Run the attached-bit advertise never command on the Level-1-2 device to disable the device from sending LSPs with the ATT bit 1.

    • Run the attached-bit avoid-learning command on the Level-1 device that is connected to the Level-1-2 device.

    Running the attached-bit advertise never command applies to all Level-1 devices that receive LSPs with the ATT bit 0. Therefore, it is more convenient.

Precautions

The ATT bit is defined in both Level-1 and Level-2 LSPs, but it can be set to 1 only in Level-1 LSPs. Additionally, only the Level-1-2 device can set the ATT bit. Therefore, running the attached-bit avoid-learning command takes effect only on the Level-1-2 device.

Example

# Enable the Level-1-2 device to set the ATT bit to 1 in the LSPs sent in IS-IS process 1.

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] attached-bit advertise always

attached-bit avoid-learning

Function

The attached-bit avoid-learning command disables a device from advertising default routes to a routing table when the ATT bit is set to 1.

The undo attached-bit avoid-learning command restores the device to generates default routes when the ATT bit is set to 1.

By default, a device advertises default routes when the ATT bit is set to 1.

Format

attached-bit avoid-learning

undo attached-bit avoid-learning

Parameters

None

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

An ATT bit is a field in link state packets. An ATT bit identifies whether Level-1 area is attached to other areas. A Level-1-2 device sets the ATT bit to 1 to notify the devices in Level-1 area of its attachment to a Level-2 backbone area. After a Level-1 device receives the LSPs carrying the ATT bit 1 from the Level-1-2 device, the Level-1 device generates a route with the same destination address as the default route of the Level-1-2 device. Traffic can be forwarded along this route.

To prevent the Level-1 device from advertising the default route when the ATT bit is set to 1, run the attached-bit avoid-learning command.

To prevent the Level-1 device from advertising default routes to the routing table, run either of the following commands:

  • Run the attached-bit advertise never command on the Level-1-2 device to disable the device from sending LSPs with the ATT bit 1.

  • Run the attached-bit avoid-learning command on the Level-1 device that is connected to the Level-1-2 device.

The difference between the preceding commands lies in that the attached-bit avoid-learning command applies to a specified device.

Example

# Disable IS-IS-enabled device from advertising default routes to a routing table when the ATT bit is set to 1.

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] attached-bit avoid-learning

auto-cost enable

Function

The auto-cost enable command enables IS-IS to automatically calculate the interface cost based on the interface bandwidth.

The undo auto-cost enable command disables IS-IS from automatically calculating the interface cost based on the interface bandwidth.

By default, IS-IS is disabled from automatically calculating the interface cost based on the interface bandwidth.

Format

auto-cost enable [ compatible ]

undo auto-cost enable

Parameters

Parameter Description Value
compatible

Specifies the IS-IS to calculate the cost of an interface based on the bandwidth of the interface automatically in compatible.

 -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After this command is run, if the cost of an IS-IS interface is not set in the interface view and no cost is set in the IS-IS view, the system automatically calculates a cost for the interface.

If the cost style of the system is wide or wide-compatible:

When auto-cost enable command is configured, Interface cost = (Bandwidth-reference/Link-bandwidth) x 10.

The cost style is set by the cost-style command.The Bandwidth-reference is set by the bandwidth-reference command. The Link-bandwidth is the interface bandwidth.

If the cost style of the system is narrow, narrow-compatible or compatible, the cost of each interface is based on the following table.

Table 7-88  Relationship between the IS-IS interface cost and the bandwidth

Cost

Range of the Interface Bandwidth

60

Interface bandwidth =< 10 Mbit/s

50

10 Mbit/s < Interface bandwidth ≤ 100 Mbit/s

40

100 Mbit/s < Interface bandwidth ≤ 155 Mbit/s

30

155 Mbit/s < Interface bandwidth ≤ 622 Mbit/s

20

622 Mbit/s < Interface bandwidth ≤ 2.5 Gbit/s

10

2.5 Gbit/s < Interface bandwidth

Precautions

The priority of the cost value of the global configured by the circuit-cost command is higher than the auto cost value.

The auto-cost enable command cannot change the cost of the loopback interface.

Example

# Enable IS-IS to automatically calculate the interface cost. 

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] auto-cost enable

bandwidth-reference (IS-IS)

Function

The bandwidth-reference command sets the bandwidth reference value that is used in automatic IS-IS interface cost calculation.

The undo bandwidth-reference command restores the default bandwidth reference value that is used in automatic IS-IS interface cost calculation.

By default, the bandwidth reference value is 100 Mbit/s.

Format

bandwidth-reference value

undo bandwidth-reference

Parameters

Parameter Description Value
value Specifies the bandwidth reference value used in automatic IS-IS interface cost calculation. The value is an integer that ranges from 1 to 2147483648, in Mbit/s.

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To make the set link cost of IS-IS routes reflect the actual link cost, configure a proper link cost for all interfaces or enable automatic interface cost calculation. To enable automatic interface cost calculation, set a proper bandwidth reference value.

You can run the bandwidth-reference command to set a proper bandwidth reference value. After automatic interface cost calculation is enabled, and the cost type is wide or wide-compatible, the system calculates the cost of each interface with the following formula: Interface cost = (Bandwidth-reference/Interface bandwidth) x 10. If the interface cost calculated through this formula is greater than 16777214, 16777214 is used as the interface cost for route calculation. That is, the interface cost will never be greater than 16777214.

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

After the auto-cost enable command enables automatic IS-IS interface cost calculation, the system automatically calculates the interface cost based on the bandwidth reference value set using the bandwidth-reference command.

Precautions
Rules for automatically calculating the IS-IS interface cost vary according to the cost style of the IS-IS interface:

  • The bandwidth reference value set using the bandwidth-reference command takes effect only when the cost style is wide or wide-compatible. In this case, the interface cost is calculated using the following formula:

    Interface cost = (Bandwidth-reference/Interface bandwidth) × 10.

  • If the cost style of the system is narrow, narrow-compatible or compatible, the cost of each interface is based on the following table.

    Table 7-89  Relationship between the IS-IS interface cost and the bandwidth

    Cost

    Range of the Interface Bandwidth

    60

    Interface bandwidth =< 10 Mbit/s

    50

    10 Mbit/s < Interface bandwidth =< 100 Mbit/s

    40

    100 Mbit/s < Interface bandwidth =< 155 Mbit/s

    30

    155 Mbit/s < Interface bandwidth =< 622 Mbit/s

    20

    622 Mbit/s < Interface bandwidth =< 2.5 Gbit/s

    10

    2.5 Gbit/s < Interface bandwidth

Example

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

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] bandwidth-reference 1000
Related Topics

bfd all-interfaces (IS-IS)

Function

The bfd all-interfaces command sets values for BFD session parameters used in BFD for IS-IS.

The undo bfd all-interfaces command restores the default values of BFD session parameters used in BFD for IS-IS.

By default, the minimum intervals for receiving and sending BFD packets are 1000 ms and the detection time multiplier is 3.

Format

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 [ receive-interval ] | min-tx-interval [ transmit-interval ] | detect-multiplier [ multiplier-value ] | frr-binding } *

Parameters

Parameter Description Value
min-rx-interval receive-interval Specifies the minimum interval for receiving BFD packets from the peer end. The interval for receiving BFD packets between determines the BFD session detection time. On an unstable link, a smaller receive interval may result in BFD session flapping. To prevent BFD session flapping, increase the receive interval.
The value is an integer, in milliseconds. If the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01, the value ranges from 3 to 1000. Otherwise, the value ranges from 100 to 1000.By default, the minimum interval for receiving BFD packets is 10 ms when the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01; otherwise, the minimum interval for receiving BFD packets is 1000 ms.
NOTE:

When the MPU is the EH1D2SRUDC00 or EH1D2SRUDC01, you need to first run the detect-engine enable command in the system view so that the value range is 3 to 1000. If the detect-engine enable command is not used first, the value range is 100 to 1000.
min-tx-interval transmit-interval Specifies the minimum interval for transmitting BFD packets to the peer end. The interval for transmitting BFD packets determines the BFD session detection time. On a stable link, you can increase the transmit interval to prevent frequent link status detection.
The value is an integer, in milliseconds. If the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01, the value ranges from 3 to 1000. Otherwise, the value ranges from 100 to 1000.By default, the minimum interval for receiving BFD packets is 10 ms when the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01; otherwise, the minimum interval for receiving BFD packets is 1000 ms.
NOTE:

When the MPU is the EH1D2SRUDC00 or EH1D2SRUDC01, you need to first run the detect-engine enable command in the system view so that the value range is 3 to 1000. If the detect-engine enable command is not used first, the value range is 100 to 1000.
detect-multiplier multiplier-value Specifies the local detection multiplier. On a stable link, you can increase the BFD detection multiplier to prevent frequent link status detection. The value is an integer that ranges from 3 to 50. The default value is 3.
frr-binding Binds the BFD session status to IS-IS Auto FRR. When BFD detects a link fault on an interface, the BFD session goes Down, triggering FRR on the interface. Then traffic is switched from the faulty link to the backup link to ensure traffic forwarding. -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

During the establishment of a BFD session, you can adjust the interval for transmitting BFD packets, interval for receiving BFD packets, and local detection multiplier according to network and performance requirements.

Precautions

The value of receive-interval is obtained by negotiating the local min-rx-interval value and the remote min-tx-interval value. If a router does not receive any BFD packet from its peer in the receive-interval × multiplier-value period, the router advertises that its peer is Down.

If only parameters of a BFD session are set but the bfd all-interfaces enable command is not used, the BFD session cannot be set up.

NOTE:

The BFD priority of the interface is higher than the BFD priority of the process. If BFD of the interface is enabled, the BFD session is set up based on the BFD parameters on the interface.

Example

# Enable BFD in an IS-IS process and set the minimum interval for transmitting BFD packets to 600 ms.

<HUAWEI> system-view
[HUAWEI] bfd
[HUAWEI-bfd] quit
[HUAWEI] isis
[HUAWEI-isis-1] bfd all-interfaces enable
[HUAWEI-isis-1] bfd all-interfaces min-tx-interval 600

bfd all-interfaces enable

Function

The bfd all-interfaces enable command enables BFD in an IS-IS process.

The undo bfd all-interfaces enable command disables BFD in an IS-IS process.

By default, BFD is disabled in an IS-IS process.

Format

bfd all-interfaces enable

undo bfd all-interfaces enable

Parameters

None

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If global BFD is not enabled, you can configure IS-IS BFD but cannot set up the BFD session. Before establishing BFD sessions, you need to enable BFD on the two ends.

Precautions

When BFD is enabled in the process using the bfd all-interfaces enable command, the interface does not set up a BFD session in the following cases:

  • The isis bfd block command is used on the interface. The command suppresses the BFD capability of the interface. To set up a session on the interface, run the undo isis bfd block command.

  • When the isis bfd static command is used on the interface, the interface does not set up the BFD session. To set up a session on the interface, run the undo isis bfd static command.

NOTE:

The BFD priority of the interface is higher than the BFD priority of the process. If BFD of the interface is enabled, a BFD session is set up based on the BFD parameters on the interface.

Example

# Enable BFD in an IS-IS process.

<HUAWEI> system-view
[HUAWEI] bfd
[HUAWEI-bfd] quit
[HUAWEI] isis
[HUAWEI-isis-1] bfd all-interfaces enable

circuit-cost

Function

The circuit-cost command sets the link cost for all IS-IS interfaces during SPF calculation.

The undo circuit-cost command deletes the configured link cost of all IS-IS interfaces.

By default, no link cost is set for IS-IS interfaces.

Format

circuit-cost { cost | maximum } [ level-1 | level-2 ]

undo circuit-cost [ cost | maximum ] [ level-1 | level-2 ]

Parameters

Parameter Description Value
cost Specifies the interface cost used in SPF calculation. If the IS-IS cost style is wide or wide-compatible, the cost of imported routes ranges from 1 to 16777214; otherwise, the cost ranges from 1 to 63.
maximum Sets the link cost of IS-IS interfaces to 16777215.
NOTE:

You can configure this parameter only when the IS-IS cost style is wide or wide-compatible. After the interface cost is set to 16777215, the neighbor TLV generated on the link can only be used to transmit TE information but cannot be used for route calculation.

 -
level-1 Specifies the link cost for all Level-1 interfaces. If no level is specified, the link cost is set for Level-1-2 interfaces. -
level-2 Specifies the link cost for all Level-2 interfaces. If no level is specified, the link cost is set for Level-1-2 interfaces. -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

On a large network, there are often multiple valid routes to the same destination. IS-IS can use the SPF algorithm to calculate the optimal route to forward traffic. This may cause the following problems:
  • All traffic is forwarded along the optimal path, resulting in load unbalance.
  • If the optimal path is intermittently disconnected, traffic is still forwarded along the optimal path, resulting in traffic loss.

To solve the preceding problems, run the circuit-cost command to change the cost of all IS-IS interfaces so that traffic can be forwarded along different physical links.

Precautions

The isis cost command takes precedence over the circuit-cost command. The circuit-cost command cannot change the cost of loopback interfaces.

Changing the link cost of interfaces will cause routes of the entire network to be recalculated and change the forwarding path of traffic.

Example

# Set the default cost of all Level-1-2 interfaces to 30.

<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] circuit-cost 30
# Set the link cost of all IS-IS interfaces to 16777215.
<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] circuit-cost maximum
Related Topics

circuit default-tag

Function

The circuit default-tag command sets the administrative tag value for all interfaces in an IS-IS process.

The undo circuit default-tag command restores the default administrative tag value for all interfaces in an IS-IS process.

By default, the administrative tag value of all IS-IS interfaces is 0.

Format

circuit default-tag tag [ level-1 | level-2 ]

undo circuit default-tag [ tag ] [ level-1 | level-2 ]

Parameters

Parameter Description Value
tag Specifies the administrative tag value for all interfaces in an IS-IS process. The value is an integer that ranges from 1 to 4294967295.
level-1 Specifies the administrative tag value for all Level-1 interfaces in an IS-IS process. If no interface level is specified, the administrative tag values of Level-1 and Level-2 interfaces are set. -
level-2 Specifies the administrative tag value for all Level-2 interfaces in an IS-IS process. If no interface level is specified, the administrative tag values of Level-1 and Level-2 interfaces are set. -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The administrative tag carries management information about IP address prefixes to control the import of routes of different levels and areas. You can use the administrative tag to control the advertisement of IP address prefixes in an IS-IS routing domain to simplify route management.

The circuit default-tag command allows you to set the administrative tag value for all routes in an IS-IS process. You can filter routes based on the configured administrative tag value.

The administrative tag for an interface is advertised along with routing information.

  • When the cost style of IS-IS is narrow or narrow-compatible, the administrative tag value is neither advertised nor takes effect in the LSP.

  • When the cost style of IS-IS is wide, wide-compatible, or compatible, the administrative tag value is advertised in the LSP.

Precautions

The value of the administrative tag configured through thecircuit default-tag command is the global administrative tag. The priority of the interface administrative tag configured by the isis tag-value command is higher than the priority of the global administrative tag.

Example

# Set the administrative tag value of Level-1 interfaces to 30.

<HUAWEI> system-view 
[HUAWEI] isis 1
[HUAWEI-isis-1] circuit default-tag 30 level-1

cost-style

Function

The cost-style command sets the cost style of routes received and sent by an IS-IS device.

The undo cost-style command restores the default cost style of routes received and sent by an IS-IS device.

By default, the cost style of routes received and sent by an IS-IS device is narrow.

Format

cost-style { narrow | wide | wide-compatible | { compatible | narrow-compatible } [ relax-spf-limit ] }

undo cost-style

Parameters

Parameter Description Value
narrow Configures an IS-IS device to receive and send only routes with cost style narrow. When the cost style is narrow, the cost of routes ranges from 1 to 63. -
wide Configures an IS-IS device to receive and send only routes with cost style wide. When the cost style is wide, the cost of routes ranges from 1 to 16777215. -
wide-compatible Configures an IS-IS device to receive routes with cost style narrow or wide and sent only routes with cost style wide. -
compatible Configures an IS-IS device to receive and send routes with cost style narrow or wide. -
narrow-compatible Configures an IS-IS device to receive routes with cost style narrow or wide and sent only routes with cost style narrow. -
relax-spf-limit Configures an IS-IS device to receive routes with cost higher than 1023.

If this parameter is specified, there is no restriction on the link costs of interfaces or route costs. The cost of a received route is the actual cost.

If this parameter is not specified, the following situations occur:

  • If the cost of a route is smaller than or equal to 1023, and the link cost of each interface through which the route passes is smaller than or equal to 63:

    The cost of the route is the sum of link costs of all interfaces through which the route passes.

  • If the cost of a route is smaller than or equal to 1023, and the link costs of certain interfaces through which the route passes are larger than 63:

    An IS-IS device can learn only the routes imported by the interfaces and direct routes of the network segment where the interfaces reside. The costs of these routes are the actual cost.

  • If the cost of a route is larger than 1023:

    The device can receive only the routes of the network segment where the interface with link cost smaller than 1023 resides. If the cost of a route is larger than 1023, the cost is calculated as 1023.

-

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

By default, the cost style of IS-IS routes is narrow, indicating that only routes with the cost ranging from 1 to 63 can be received and sent. LSPs carrying TE information when IS-IS is applied to MPLS TE or LSPs carrying tag information to be filtered by a routing policy cannot be flooded when the cost style is narrow. The cost-style command can be used to change the cost style of IS-IS routes so that they can be transmitted successfully.

To implement extended IS-IS functions, setting the cost style of IS-IS routes to wide is recommended.

Precautions

When the cost style of a route is changed from wide to narrow, transmission of the route may be interrupted.

If you want to change the cost style of IS-IS routes, running the command while configuring basic IS-IS functions is recommended. If the cost style of IS-IS routes is changed during network operation, the IS-IS process is restarted and neighbors are disconnected.

Example

# Configure an IS-IS device to send only the packets with cost style narrow and to receive the packets with cost style narrow or wide.

<HUAWEI> system-view
[HUAWEI] isis 1 
[HUAWEI-isis-1] cost-style narrow-compatible

default-route-advertise (IS-IS)

Function

The default-route-advertise command configures IS-IS devices to generate default routes.

The undo default-route-advertise command disables IS-IS devices from generating default routes.

By default, IS-IS devices do not generate default routes.

Format

default-route-advertise [ always | match default | route-policy route-policy-name ] [ cost cost | tag tag | [ level-1 | level-1-2 | level-2 ] ] * [ avoid-learning ]

undo default-route-advertise

Parameters

Parameter Description Value
always Configures an IS-IS device to unconditionally advertise default routes with itself as the next hop. -
match default Advertises a default route through an LSP if the default route is generated by other routing protocols or other IS-IS processes in the routing table. If this default route is deleted from the routing table, it is not advertised through an LSP. -
route-policy route-policy-name Specifies the name of a route-policy. A Level-1-2 device advertises default routes to the IS-IS routing domain only when there are external routes matching the route-policy in the routing table of the device. This prevents routing blackhole when link faults make some important external routes unavailable but default routes are still advertised. This route-policy does not affect external route import in IS-IS. 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.
cost cost Specifies the cost of default routes. The value is an integer. The value range varies according to the cost style. When the cost style is narrow, narrow-compatible, or compatible, the value ranges from 0 to 63. When the cost style is wide or wide-compatible, the value ranges from 0 to 4261412864.
tag tag Specifies the tag value of advertised default routes. Advertised LSPs carry the tag value only when the IS-IS cost style is wide, wide-compatible, or compatible. The value is an integer that ranges from 1 to 4294967295.
level-1 Sets the level of default routes to Level-1. If no level is specified, Level-2 default routes are generated by default. -
level-2 Sets the level of default routes to Level-2. If no level is specified, Level-2 default routes are generated by default. -
level-1-2 Sets the level of default routes to Level-1-2. If no level is specified, Level-2 default routes are generated by default. -
avoid-learning Prevents an IS-IS process from learning default routes or adding them to the routing table. If existing default routes in the routing table are active, set the default route that needs to be added to the routing table to inactive. -

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When IS-IS and other routing protocols are running on a network, use either of the following methods to allow the traffic within the IS-IS domain to be transmitted to other routing domains:

  • Configure a boundary router in the IS-IS domain to advertise default routes to the IS-IS domain.

  • Configure a boundary router in the IS-IS domain to import routes from the other routing domains to the IS-IS domain.

The first method is simpler, because the routers in the IS-IS domain do not need to learn routes imported form the other routing protocols.

Precautions

You can specify always to allow default routes to be advertised unconditionally; in this case, the device still calculates default routes from other devices.
NOTE:

If always is configured on multiple devices within the same area, a routing loop may occur.

After this command is run on an IS-IS router, all traffic in an IS-IS domain will be forwarded by this IS-IS router to a destination outside the domain. Compared with configuring a static default route on each router in an IS-IS domain, running this command simplifies configurations, because this command only needs to be run on a boundary router in the IS-IS domain. In addition, you can specify different parameters to allow default routes to be advertised in different ways.

If this command is run on a Level-1 router, the router advertises default routes only to the Level-1 area.

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, an ABR advertises the default route to the IS-IS domain as long as the local routing table contains external routes.

Example

# Configure the current IS-IS device to advertise the IPv4 default routes that match route-policy filter and set the cost of these default routes to 15.

<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] default-route-advertise route-policy filter cost 15

description (IS-IS)

Function

The description command configures a description for an IS-IS process.

The undo description command deletes the description of an IS-IS process.

By default, no description is configured for an IS-IS process.

Format

description description

undo description

Parameters

Parameter Description Value
description Configures a description for an IS-IS process. The value is a string of 1 to 80 case-sensitive characters. Spaces are supported.

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Configuring descriptions for IS-IS processes helps identify and maintain IS-IS processes.

IS-IS process description that is configured through the description command is not advertised in an LSP.

IS-IS process description that is configured through the is-name command is advertised in an LSP.

Precautions

If you run the description command multiple times, only the latest configuration takes effect.

Example

# Configure description for IS-IS process 1.

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] description this process configure the area-authentication-mode

display default-parameter isis

Function

The display default-parameter isis command displays the default IS-IS configuration.

Format

display default-parameter isis

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display default-parameter isis command to check the default IS-IS configuration in IS-IS initialization.

Example

# Display the default IS-IS configuration.

<HUAWEI> display default-parameter isis

                       Default Configurations For Process
                       ----------------------------------
   Cost-Style                            : Narrow
   Circuit-Cost <IPv4>                   : L1 10 L2 10
   Circuit-Cost <IPv6>                   : L1 10 L2 10
   IS-Level                              : L12
   LSP-Originate-Length                  : 1497
   LSP-Receive-Length                    : 1497
   LSP-Max-Age <s>                       : 1200
   LSP-Generation-IntelliTimer <s,ms,ms> : L1 Max 2 Init 0 Incr 0 
                                           L2 Max 2 Init 0 Incr 0
   LSP-Refresh-Interval <s>              : 900
   Preference                            : IPv4 15 IPv6 15
   SPF-IntelliTimer <s,ms,ms>            : Max 5 Init 50 Incr 200

                     Default Configurations For Interfaces
                     -------------------------------------
   Circuit-Level                         : L12
   CSNP-Interval <s>                     : L1 10 L2 10
   Cost <IPv4>                           : L1 10 L2 10
   Cost <IPv6>                           : L1 10 L2 10
   DIS-Priority                          : L1 64 L2 64
   Hello-Interval <s>                    : L1 10 L2 10
   Holding-Multiplier                    : L1 3 L2 3
   LSP-Retransmit <s>                    : 5
   LSP-Throttle <ms>                     : 50 count 10
   PPP-Negotiation                       : 3-Way
   Peer Suppress-Flapping <s>            : Detect-Interval 60 
                                           Resume-Interval 120
                                           Threshold       10
Table 7-90  Description of the display default-parameter isis command output

Item

Description

Default Configurations For Process

Default configuration of an IS-IS process.

Cost-Style
IS-IS cost style:

  • narrow

  • wide

  • wide-compatible

  • compatible

  • narrow-compatible

To set the IS-IS cost style, run the cost-style command.

Circuit-Cost <IPv4>

Cost of all IS-IS IPv4 interfaces. To set the cost of IS-IS IPv4 interfaces, run the circuit-cost command.

Circuit-Cost <IPv6>

Cost of all IS-IS IPv6 interfaces. To set the cost of IS-IS IPv6 interfaces, run the ipv6 circuit-cost command.

IS-Level
Level of an IS-IS device:

  • L1: Level-1 device

  • L2: Level-2 device

  • L12: Level-1-2 device

To set the level of an IS-IS device, run the is-level command.

LSP-Originate-Length

Maximum length of an LSP generated by IS-IS. To set the maximum length of an LSP generated by IS-IS, run the lsp-length command.

LSP-Receive-Length

Maximum length of an LSP received by IS-IS. To set the maximum length of an LSP received by IS-IS, run the lsp-length command.

LSP-Max-Age <s>

Maximum lifetime of an LSP generated by an IS-IS process, in seconds. To set the maximum lifetime of an LSP generated by an IS-IS process, run the timer lsp-max-age command.

LSP-Generation-IntelliTimer <s,ms,ms>
Delay in generating LSPs:

  • L1: delay for a Level-1 router to generate LSPs

  • L2: delay for a Level-2 router to generate LSPs

  • Max: maximum delay in generating LSPs, in seconds

  • Init: initial delay in generating LSPs, in milliseconds

  • Incr: incremental delay in generating LSPs, in milliseconds

To set the delay in generating LSPs, run the timer lsp-generation command.

LSP-Refresh-Interval <s>

Interval for refreshing LSPs, in seconds. To set the interval for refreshing LSPs, run the timer lsp-refresh command.

Preference

Protocol preference of IS-IS routes. To set the protocol preference of IS-IS routes, run the preference (IS-IS) command.

SPF-IntelliTimer <s,ms,ms>
Delay in SPF calculation:

  • Max: maximum delay in SPF calculation, in seconds

  • Init: initial delay in SPF calculation, in milliseconds

  • Incr: incremental delay in SPF calculation, in milliseconds

To set the delay in SPF calculation, run the timer spf command.

Default Configurations For Interfaces

Default configuration of IS-IS interfaces.

Circuit-Level

IS-IS interface level. To set the IS-IS interface level, run the isis circuit-level command.

CSNP-Interval <s>

Interval for sending CSNPs, in seconds. To set the interval for sending CSNPs, run the isis timer csnp command.

Cost <IPv4>

Cost of IS-IS interfaces in an IPv4 topology. To set the cost of IS-IS interfaces in an IPv4 topology, run the isis cost command.

Cost <IPv6>

Cost of IS-IS interfaces in an IPv6 topology. To set the cost of IS-IS interfaces in an IPv6 topology, run the isis ipv6 cost command.

DIS-Priority

Priority for DIS election. To set the priority for DIS election, run the isis dis-priority command.

Hello-Interval <s>

Interval for sending Hello packets, in seconds. To set the interval for sending Hello packets, run the isis timer hello command.

Holding-Multiplier

Number of consecutive Hello packets that are not received before the neighbor is declared Down. To set this value, run the isis timer holding-multiplier command.

LSP-Retransmit <s>

Interval for retransmitting LSPs on a P2P link, in seconds. To set the retransmit interval, run the isis timer lsp-retransmit command.

LSP-Throttle <ms>

Interval for sending LSPs or CSNPs, in milliseconds, and number of LSPs or CSNPs that are sent each time. To set the two values, run the isis timer lsp-throttle command.

PPP-Negotiation
PPP negotiation type during the establishment of IS-IS adjacencies:

  • 2-way

  • 3-way

  • only

To set the PPP negotiation type during the establishment of IS-IS adjacencies, run the isis ppp-negotiation command.

Peer Suppress-Flapping <s>
Detection parameters for IS-IS neighbor relationship flapping suppression on an interface:
  • Detect-Interval: detection interval of IS-IS neighbor relationship flapping suppression
  • Resume-Interval: interval for exiting from IS-IS neighbor relationship flapping suppression
  • Threshold: threshold of IS-IS neighbor relationship flapping suppression

display isis cost interface

Function

The display isis cost interface command displays costs of an interface and how they are generated.

Format

display isis cost interface interface-type interface-number

Parameters

Parameter Description Value
interface-type interface-number Specifies the type and number of an interface. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis cost interface command to check costs of an IS-IS interface, including the link cost and route prefix cost that the interface uses in each topology, and how the costs are generated.

Example

# Display costs of VLANIF 100 and how they are generated.

<HUAWEI> display isis cost interface vlanif 100
Interface: Vlanif 100
                             Level-2 interface cost
 Topology base(0):
  Link effective cost: 10(A)                           enabled by circuit cost
  IP prefix effective cost:
   10.10.7.0/24                    cost: 10            enabled by circuit cost
   10.10.8.0/24                    cost: 10            enabled by circuit cost
   10.10.9.0/24                    cost: 10            enabled by circuit cost
 Topology red(7):
  Link effective cost: 87(A)                           enabled by circuit cost
  IP prefix effective cost:
   10.10.7.0/24                    cost: 87            enabled by circuit cost
   10.10.8.0/24                    cost: 87            enabled by circuit cost
   10.10.9.0/24                    cost: 87            enabled by circuit cost

                    Flags: R-Relative cost  A-Absolute cost
Table 7-91  Description of the display isis cost interface command output

Item

Description

Interface

Type and ID of an interface on which IS-IS is enabled

Link effective cost

Link cost

IP prefix effective cost

Cost of an IPv4 route

cost

Interface cost

enabled by circuit cost

Default cost or cost configured in the isis cost command

enabled by auto cost

Cost configured in the auto-cost enable command

enabled by global cost

Cost configured in the circuit cost command

enabled by igp ldp

The interface cost is configured by LDP

enabled by rui cost

Cost that inherits the cost of the RUI route

enabled by silent cost

Cost configured in the isis silent command in the interface view

enabled by tunnel cost

Cost generated after the TE Tunnel is configured

IPv6 prefix effective cost

Cost of an IPv6 route

Flags
Cost flag
  • R-Relative cost: relative cost
  • A-Absolute cost: absolute cost

display isis bfd interface

Function

The display isis bfd interface command displays information about BFD-enabled IS-IS interfaces.

Format

display isis [ process-id ] bfd interface

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

BFD can provide millisecond-level fault detection. It can work with IS-IS to fast detect faults on neighboring devices and instruct IS-IS to recalculate routes for correct packet forwarding. You can run the display isis bfd interface command to check information about BFD-enabled IS-IS interfaces.

Example

# Display information about BFD-enabled IS-IS interfaces.

<HUAWEI> display isis 1 bfd interface
                                                                                
                    BFD information of interface for ISIS(1)                    
                   -----------------------------------------                    
 Interface                     BFD.State       Min-Tx        Min-Rx         Mul 
 Vlanif101                      enable          1000          1000          3   
 Total interfaces: 1                         Total bfd enabled interfaces: 1
Table 7-92  Description of the display isis bfd interface command output

Item

Description

Interface

BFD-enabled IS-IS interface. To enable BFD on an IS-IS interface, run the bfd all-interfaces enable or isis bfd enable command.

BFD.State
BFD status on the IS-IS interface:

  • enable: BFD is enabled on the interface.

  • disable: BFD is disabled on the interface.

To enable BFD on an IS-IS interface, run the bfd all-interfaces enable or isis bfd enable command.

Min-Tx

Minimum interval for transmitting BFD packets. To set the minimum interval, run the bfd all-interfaces (IS-IS) or isis bfd command.

Min-Rx

Minimum interval for receiving BFD packets. To set the minimum interval, run the bfd all-interfaces (IS-IS) or isis bfd command.

Mul

Local detection multiplier. To set the local detection multiplier, run the bfd all-interfaces (IS-IS) or isis bfd command.

display isis bfd session

Function

The display isis bfd session command displays information about dynamic BFD sessions.

Format

display isis [ process-id | vpn-instance vpn-instance-name ] bfd session { all | peer ip-address | interface interface-type interface-number }

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
all Specifies all IS-IS interfaces in the IS-IS process. -
peer ip-address Specifies the IP address of a neighbor. The value is in dotted decimal notation.
interface interface-type interface-number Specifies the interface on which BFD session statistics need to be collected. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

BFD can provide millisecond-level fault detection. It can work with IS-IS to fast detect faults on neighboring devices and instruct IS-IS to recalculate routes for correct packet forwarding. You can run the display isis bfd session command to check information about dynamic BFD sessions.

Example

# Display information about dynamic BFD sessions.

<HUAWEI> display isis bfd session all
                      BFD session information for ISIS(1)
                      -----------------------------------
Peer System ID : 0000.0000.0002           Interface : Vlanif10
TX : 1000          BFD State : up         Peer IP Address : 10.1.1.2
RX : 1000          LocDis : 8194          Local IP Address: 10.1.1.1
Multiplier : 3     RemDis : 8197          Type : L1
Diag : No diagnostic information 
Total BFD session(s) : 1
Table 7-93  Description of the display isis bfd session all command output

Item

Description

Peer System ID

System ID of the neighbor.

Interface

Local IS-IS interface connected to the neighbor.

TX

Negotiated minimum interval for transmitting BFD packets.

BFD State

BFD session status: Up or Down.

Peer IP Address

IP address of the remote IS-IS interface.

RX

Negotiated minimum interval for receiving BFD packets.

LocDis

Local discriminator dynamically assigned by BFD.

Local IP Address

IP address of the local IS-IS interface.

Multiplier

Remote detection multiplier.

RemDis

Remote identifier dynamically assigned by BFD.

Type
Level of the neighbor:
  • L1: Level-1
  • L2: Level-2
  • L1L2: Level-1-2

Diag

Diagnostic information. "No diagnostic information" indicates that BFD runs properly and no diagnostic information is displayed.

Total BFD session (s)

Total number of BFD sessions.

display isis brief

Function

The display isis brief command displays brief information about IS-IS.

Format

display isis brief [ process-id | vpn-instance vpn-instance-name ]

display isis [ process-id ] brief

Parameters

Parameter Description Value
process-id Display brief information about a specified IS-IS process. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Display brief information about the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis brief command to check brief information about IS-IS.

Example

# Display brief information about IS-IS.

<HUAWEI> display isis brief

                     ISIS Protocol Information for ISIS(1)
                     -------------------------------------
SystemId: 0000.0000.0001      System Level: L1
Area-Authentication-mode: NULL
Domain-Authentication-mode: NULL
Ipv6 is not enabled
ISIS is in starting status
ISIS is in protocol hot standby state: Real-Time Backup
Flush Protect Mode: False

Interface: (Vlanif10)
Cost: L1 10        L2 10                Ipv6 Cost: L1 10   L2 10
State: IPV4 Down                        IPV6 Down
Type: BROADCAST                         MTU: 1497
Priority: L1 64   L2 64
Timers:     Csnp: L1 10    L2 10    ,Retransmit: L12 5   , Hello: L1 10 L2 10  ,

Hello Multiplier: L1 3    L2 3     , LSP-Throttle Timer: L12 50
Table 7-94  Description of the display isis brief command output

Item

Description

ISIS Protocol Information for ISIS(1)

Information about IS-IS process 1. To create an IS-IS process, run the isis command.

SystemId

System ID of the current IS-IS device. To set the system ID, run the network-entity command.

System Level
Level of an IS-IS device:

  • L1: Level-1

  • L2: Level-2

  • L12: Level-1-2

To set the level of an IS-IS device, run the is-level command.

Area-Authentication-mode

IS-IS area authentication mode. To set the IS-IS area authentication mode and password, run the area-authentication-mode command.

Domain-Authentication-mode

IS-IS routing domain authentication mode. To set the IS-IS domain authentication mode and password, run the domain-authentication-mode command.

Ipv6 is not enabled

IPv6 is not enabled in the IS-IS process.

ISIS is in starting status

IS-IS is running.

ISIS is in protocol hot standby state: Real-Time Backup

IS-IS hot standby is real-time backup.

Flush Protect Mode

Indicates whether the process works in purge LSP protection mode.

Interface

Interface on which IS-IS is enabled. To enable IS-IS on an interface, run the isis enable command.

Cost

Cost of IS-IS IPv4 interfaces. To set the cost of IS-IS IPv4 interfaces, run the circuit-cost or isis cost command.

Ipv6 Cost

Cost of IS-IS IPv6 interfaces. To set the cost of IS-IS IPv6 interfaces, run the ipv6 circuit-cost or isis ipv6 cost command.

State

Status of the IS-IS interface.

Type

Network type of the IS-IS interface: P2P or broadcast. To set the network type of an IS-IS interface, run the isis circuit-type command.

MTU

MTU of the IS-IS interface.

Priority
Priority of the IS-IS interface.
NOTE:

When the current interface is a virtual link interface, the priority field is not displayed.

Timers

IS-IS timer.

Csnp

Interval for sending CSNPs. To set the interval for sending CSNPs, run the isis timer csnp command.

Retransmit

Interval for retransmitting LSPs on a P2P link. To set the retransmit interval, run the isis timer lsp-retransmit command.

Hello

Interval for sending Hello packets. To set the interval for sending Hello packets, run the isis timer hello command.

Hello Multiplier

Number of consecutive Hello packets that are not received before the neighbor is declared Down. To set this value, run the isis timer holding-multiplier command.

LSP-Throttle Timer

Interval for sending LSPs or CSNPs and number of LSPs or CSNPs that are sent each time. To set the two values, run the isis timer lsp-throttle command.

display isis debug-switches

Function

The display isis debug-switches command displays the current IS-IS debugging status.

Format

display isis debug-switches [ process-id ]

display isis [ process-id ] debug-switches

Parameters

Parameter Description Value
process-id

Displays the current status of IS-IS debugging of specified IS-IS process ID.

If process-id is not specified, display the current status of IS-IS debugging of all IS-IS process.

 The value is an integer that ranges from 1 to 65535.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

If no IS-IS process is enabled or IS-IS debugging is not enabled, the display isis debug-switches command output is empty.

Example

# Display the IS-IS debugging status.

<HUAWEI> display isis debug-switches 1
ISIS-1 SPF events related debugging switch is on

display isis error

Function

The display isis error command displays statistics about error LSPs and Hello packets that are received by IS-IS interfaces or processes.

Format

display isis error [ { process-id | vpn-instance vpn-instance-name } [ interface ] ]

display isis error interface interface-type interface-number

Parameters

Parameter Description Value
process-id Displays statistics about error packets received by a specified IS-IS process. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Displays statistics about error packets received by the IS-IS process in a specified VPN instance. The value must be an existing VPN instance name.
interface

Displays statistics about error packets received on all interfaces in a specified IS-IS process or VPN instance.

 -
interface-type interface-number Displays statistics about error packets received by a specified interface. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis error command to check statistics about error LSPs and Hello packets that are received by IS-IS interfaces or processes.

Example

# Display statistics about error LSPs and Hello packets received on all interfaces in IS-IS process 1.

<HUAWEI> display isis error 1
                    Statistics of error packets for ISIS(1)                     
                    ---------------------------------------                     
LSP packet errors:                                                              
Longer LSP              : 0           Smaller LSP             : 0               
Mismatched Level        : 0           Invalid Sysid           : 0               
Zero Sequence Number    : 0           Illegal IS Type         : 0               
Zero Checksum           : 0           Incorrect Checksum      : 0               
Bad Authentication      : 0           Bad Auth Count          : 0               
More Protocol TLV       : 0           Bad Nbr TLV             : 0               
Bad Extended IS TLV     : 0           Bad IF Addr TLV         : 0               
Bad Reach TLV           : 0           Bad Inter Domain TLV    : 0               
Mismatched Area Id(L1)  : 0           Bad TLV Length          : 0               
Bad Alias TLV           : 0           Bad Area TLV            : 0               
Bad SRLG TLV            : 0           Unknown Adjacency       : 0               
Bad Protocol ID         : 0           Bad Version             : 0               
Zero Lifetime           : 0           Bad Ext Reach TLV       : 0               
Bad TE Router ID TLV    : 0           Bad TE Sub TLV          : 0               
                                                                                
Hello packet errors:                                                            
Bad Packet Length       : 0           Reserved CircType       : 0               
Repeated System ID      : 0           Bad Circuit Type        : 0               
Longer packet           : 0           More Area Addr          : 0               
Longer Area Addr        : 0           Bad Area Addr TLV       : 0               
More IF Addr            : 0           Bad Formatted IF TLV    : 0               
More Nbr SNPA(LAN)      : 0           Invalid Sysid           : 0               
Bad TLV Length          : 0           Zero HoldingTime        : 0               
Unusable IP Addr        : 0           Repeated IPv4 Addr      : 0               
Mismatched Area Addr(L1): 0           Mismatched Proto        : 0               
SNPA Conflicted(LAN)    : 0           Mismatched Level        : 0               
Mismatched Max Area Addr: 0           Bad Authentication      : 0               
More Auth TLV           : 0           3-Way Option Error(P2P) : 0               
No Area Addr TLV        : 0           Bad Protocol ID         : 0               
Bad Version             : 0           Invalid IPv6 Addr       : 0               
More IPv6 IF Addr       : 0           Duplicate IPv6 Addr     : 0               
More Optional Checksum  : 0           Bad Optional Checksum   : 0               
--------------------------------------------------------------------
Table 7-95  Description of the display isis error command output

Item

Description

LSP packet errors

LSP errors.

Longer LSP

The LSP length is greater than the value set using the lsp-length receive command.

Smaller LSP

The LSP header length is smaller than the fixed length.

Mismatched Level

The level of received LSPs mismatches the local IS-IS level.

Invalid Sysid

The system ID in an LSP is invalid.

Zero Sequence Number

The sequence number of an LSP is 0.

Illegal IS Type

The IS type is invalid.

Zero Checksum

The checksum of an LSP is 0.

Incorrect Checksum

The checksum of an LSP is incorrect.

Bad Authentication

The authentication field of an LSP is incorrect.

Bad Auth Count

The number of authentication fields carried in an LSP is incorrect, that is, it is greater than 1.

More Protocol TLV

The number of protocol TLVs in an LSP is greater than 1.

Bad Nbr TLV

The neighbor TLV is incorrect.

Bad Extended IS TLV

The extended IS TLV is incorrect.

Bad IF Addr TLV

The interface address TLV is incorrect.

Bad Reach TLV

The reachability TLV is incorrect.

Bad Inter Domain TLV

The inter-domain TLV is incorrect. The correct TLV is 0x83.

Mismatched Area Id(L1)

Mismatched Level-1 area ID.

Bad TLV Length

The TLV length is incorrect.

Bad Alias TLV

The Alias TLV is incorrect.

Bad Area TLV

The area TLV is incorrect.

Bad SRLG TLV

The SRLG TLV is incorrect.

Unknown Adjacency

LSPs are received from unknown adjacency.

Bad Protocol ID

The protocol ID is incorrect.

Bad Version

The version is incorrect.

Zero Lifetime

The remaining lifetime of an LSP is 0.

Bad Ext Reach TLV

The Ext Reach TLV is incorrect.

Bad TE Router ID TLV

The TE Router ID TLV is incorrect.

Bad TE Sub TLV

The TE sub-TLV is incorrect.

Hello packet errors

Hello packet errors.

Bad Packet Length

The Hello packet length is incorrect.

Reserved CircType

The reserved link type is incorrect.

Repeated System ID

The system ID is repeated.

Bad Circuit Type

The link type is incorrect.

Longer packet

The Hello packet length is greater than the larger value between the interface MTU and the value set using the lsp-lengthoriginate command.

More Area Addr

Area addresses are superfluous.

Longer Area Addr

The area address is too long.

Bad Area Addr TLV

The area address TLV is incorrect.

More IF Addr

Interface addresses are superfluous.

Bad Formatted IF TLV

The format of the interface TLV is incorrect.

More Nbr SNPA(LAN)

Sub-network Points of Attachment (SNPAs) of a neighbor on a broadcast network are superfluous.

Invalid Sysid

The system ID length field is not 0 or 6.

Bad TLV Length

The TLV length is incorrect.

Zero HoldingTime

The neighbor holdtime is 0.

Unusable IP Addr

The IP address is on a different network segment than the peer end.

Repeated IPv4 Addr

The IPv4 address is repeated.

Mismatched Area Addr(L1)

Mismatched Level-1 area address.

Mismatched Proto

Mismatched protocol.

SNPA Conflicted(LAN)

Conflicting SNPA on a broadcast network.

Mismatched Level

The level of received Hello packets mismatches the local IS-IS level.

Mismatched Max Area Addr

The maximum area address is incorrect.

Bad Authentication

The authentication field of a Hello packet is incorrect.

More Auth TLV

Authentication TLVs are superfluous.

3-Way Option Error(P2P)

3-way information is incorrect.

No Area Addr TLV

The received Hello packet has no area address TLV.

Bad Protocol ID

The protocol ID is incorrect.

Bad Version

The version is incorrect.

Invalid IPv6 Addr

An IPv6 address is invalid.

More IPv6 IF Addr

A Hello packet carries more than 11 IPv6 addresses.

Duplicate IPv6 Addr

The IPv6 address is repeated.

More Optional Checksum

More than one optional checksum TLV is contained in a packet.

Bad Optional Checksum

Error optional checksum TLV.

display isis graceful-restart status

Function

The display isis graceful-restart status command displays the IS-IS GR status.

Format

display isis process-id graceful-restart status [ level-1 | level-2 ]

display isis graceful-restart status [ level-1 | level-2 ] [ process-id | vpn-instance vpn-instance-name ]

Parameters

Parameter Description Value
level-1 Displays the Level-1 IS-IS GR status. -
level-2 Displays the Level-2 IS-IS GR status. -
process-id Displays the IS-IS GR status of a specified IS-IS process. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Displays the IS-IS GR status of the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis graceful-restart status command to check the IS-IS GR status.

Example

# Display the IS-IS GR status.

<HUAWEI> display isis graceful-restart status
                      Restart information for ISIS(1)
                        -------------------------------
IS-IS(1) Level-1 Restart Status
Restart Interval: 300
SA Bit Supported
  Total Number of Interfaces = 1
  Restart Status: RESTART COMPLETE
IS-IS(1) Level-2 Restart Status
Restart Interval: 300
SA Bit Supported
  Total Number of Interfaces = 1
  Restart Status: RESTART COMPLETE
Table 7-96  Description of the display isis graceful-restart status command output

Item

Description

Restart Interval

Expected restart time of the device. This parameter is configured using the graceful-restart interval command.

SA Bit Supported

Whether the device supports SA.

Total Number of Interfaces = 1

Number of interfaces on which IS-IS is enabled. IS-IS is enabled using the isis enable command on an interface.

Restart Status:

Restart status of the current device. RESTART COMPLETE indicates that the restart is complete.

display isis interface

Function

The display isis interface command displays information about IS-IS interfaces.

Format

display isis interface [ [ verbose | traffic-eng ] * | te-tunnel ] [ process-id | vpn-instance vpn-instance-name ]

display isis process-id interface [ te-tunnel | [ traffic-eng | verbose ] * ]

display isis interface interface-type interface-number [ verbose ]

Parameters

Parameter Description Value
verbose Displays detailed information about IS-IS interfaces. -
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
traffic-eng Displays Traffic Engineering information of IS-IS. -
te-tunnel Displays information on the MPLS TE tunnel of IS-IS. -
vpn-instance vpn-instance-name Display IS-IS interface information in the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
interface-type interface-number Specifies the type and number of an interface. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can use this command to view IS-IS interface information, including the interface name, IP address, link status of the interface. If verbose is specified, the command output also includes the configuration of IS-IS parameters for the interface, such as the CSNP broadcast interval, Hello packet broadcast interval, and number of IS-IS Hello packets that fail to be received before IS-IS declares the neighbor Down.

Example

# Display information about IS-IS interfaces.

<HUAWEI> display isis interface
                                                                                
                       Interface information for ISIS(1)                        
                       ---------------------------------                        
 Interface       Id      IPV4.State          IPV6.State      MTU  Type  DIS     
 Vlanif10        001        Up                  Down         1497 L1/L2 No/No

# Display detailed information about IS-IS interfaces.

<HUAWEI> display isis interface verbose
                       Interface information for ISIS(1)
                       ---------------------------------
 Interface       Id      IPV4.State          IPV6.State      MTU  Type  DIS   
 Vlanif10       001         Up                 Down         1497 L1/L2 No/No 
  Circuit MT State            : Standard 
  Description                 : 
  SNPA Address                : 0000-1382-4569
  IP Address                  : 10.1.1.5
  IPV6 Link Local Address     :
  IPV6 Global Address (es)    :
  Csnp Timer Value            :  L1    10  L2    10
  Hello Timer Value           :  L1    10  L2    10
  DIS Hello Timer Value       :  L1     3  L2     3
  Hello Multiplier Value      :  L1     3  L2     3
  LSP-Throttle Timer          :  L12    50
  Cost                        :  L1    10  L2    10
  Ipv6 Cost                   :  L1    10  L2    10
  Priority                    :  L1    64  L2    64
  Retransmit Timer Value      :  L12    5
  Bandwidth-Value             :  Low 1000000000  High          0
  Static Bfd                  :  NO
  Dynamic Bfd                 :  NO
  Dynamic IPv6 Bfd            :  NO
  Fast-Sense Rpr              :  NO
  Suppress flapping peer      :  enable (flapping-count: 0, threshold: 10)
Table 7-97  Description of the display isis interface command output

Item

Description

Interface

IS-IS interface type and number.

Id

Link ID.

IPV4.State

IPv4 link status.

IPV6.State

IPv6 link status.

MTU

Interface MTU. An IS-IS neighbor relationship can be established only when two interfaces on both ends of a link have the same MTU.

Type
Interface type:
  • L1: Level-1 interface
  • L2: Level-2 interface
  • L1/L2: Level-1-2 interface

DIS

Whether the interface is a DIS.

NOTE:

Only an interface with network type broadcast can be selected as the DIS. If an interface is a P2P interface, "--" is displayed in this field.

Circuit MT State
Topology status on the interface:
  • Standard:

    • IPv4 is enabled on the interface, but IPv6 is not.

    • IPv6 is enabled on the interface, but IPv4 is not. In addition, the topology type is standard.

    • Both IPv4 and IPv6 are enabled on the interface. In addition, the topology type is standard.

  • IPv6: IPv6 is enabled on the interface, but IPv4 is not. In addition, the topology type is IPv6.
  • Standard IPv6:

    • IPv6 is enabled on the interface, but IPv4 is not. In addition, the topology type is compatible.

    • Both IPv4 and IPv6 are enabled on the interface. In addition, the topology type is compatible or IPv6.

To configure the IPv6 topology type, run the ipv6 enable command in the IS-IS view.

SNPA Address

MAC address.

IP Address

IPv4 address of the interface.

IPV6 Link Local Address

IPv6 link-local address.

IPV6 Global Address(es)

IPv6 global address.

Csnp Timer Value

Interval for sending CSNPs. To set the interval for sending CSNPs, run the isis timer csnp command.

Hello Timer Value

Interval for sending Hello packets. To set the interval for sending Hello packets, run the isis timer hello command.

DIS Hello Timer Value

Interval at which the DIS sends Hello packets, which is one third of Hello Timer Value. The field takes effect only when the interface functions as the DIS.

Hello Multiplier Value

Number of consecutive Hello packets that are not received before the neighbor is declared Down. To set this value, run the isis timer holding-multiplier command.

LSP-Throttle Timer

Interval for sending LSPs or CSNPs and number of LSPs or CSNPs that are sent each time. To set the two values, run the isis timer lsp-throttle command.

Cost

Cost of an IPv4 interface. This field value affects route selection.

Ipv6 Cost

Cost of an IPv6 interface. This field value affects route selection in IPv6 topologies.

Priority

Priority for DIS election. To set the priority for DIS election, run the isis dis-priority command.

Retransmit Timer Value

Interval for retransmitting LSPs on a P2P link. To set the retransmit interval, run the isis timer lsp-retransmit command.

Bandwidth-Value
Physical bandwidth of an interface. The value can be calculated using the following formula: Bandwidth-Value = 4294967296 x high + low. For example, if the value of high is 1 and the value of low is 705032704, Bandwidth-Value = 1 x 4294967296 + 705032704 = 5000000000.
  • low: low bandwidth with the maximum value of 4294967295
  • high: high bandwidth with the maximum value of 4294967295

Static Bfd
Status BFD status:
  • NO: Static BFD is not enabled.
  • YES: Static BFD is enabled.
To enable BFD on an interface, run the isis bfd static command.

Dynamic Bfd
Dynamic BFD status:
  • NO: Dynamic BFD is not enabled.
  • YES: Dynamic BFD is enabled.
To enable dynamic BFD on an interface, run the bfd all-interfaces enable or isis bfd enable command.

Dynamic IPv6 Bfd
Status of dynamic IPv6 BFD:
  • NO: Dynamic BFD is not enabled on the interface.
  • YES: Dynamic BFD is enabled on the interface.
To enable dynamic IPv6 BFD on an interface, run the ipv6 bfd all-interfaces enable (IS-IS) or isis ipv6 bfd enable command.

Fast-Sense Rpr

Whether the fast sense RPR function is enabled.

Suppress flapping peer

Status of IS-IS neighbor relationship flapping suppression:

  • NO: IS-IS neighbor relationship flapping suppression is disabled.

  • YES (flapping-count: 3, threshold: 10): IS-IS neighbor relationship flapping suppression is enabled and IS-IS neighbor relationship is not suppressed. The flapping-count and threshold value.

  • Hold-down(start: UTC 10:20:30, remain-interval: 7): IS-IS neighbor relationship flapping suppression works in Hold-down mode. The starting and remaining time of the flapping suppression.

  • Hold-max-cost(start: UTC 10:20:30, remain-interval: 7): IS-IS neighbor relationship flapping suppression works in Hold-max-cost mode. The starting and remaining time of the flapping suppression.

NOTE:

In the flapping suppression state, remain-interval is reset each time when the device detects a valid neighbor flapping event.

display isis last-peer-change

Function

The display isis last-peer-change command displays changes in IS-IS neighbor relationships.

Format

display isis process-id last-peer-change

display isis last-peer-change [ process-id | vpn-instance vpn-instance-name ]

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can use the display isis last-peer-change command to view a maximum of 100 latest records in each IS-IS process.

Example

# Display changes in IS-IS neighbor relationships.

<HUAWEI> display isis last-peer-change
                      Peer change information for ISIS(1)
                      -----------------------------------

Time      : 2011-03-28 09:30:34
System Id : 0000.0000.0002
Type      : L1 LAN
Interface : vlanif10
State     : IPv4 -> IPv4/IPv6
Details   : Protocol change
Table 7-98  Description of the display isis last-peer-change command output

Item

Description

Time

Time a neighbor relationship changes.

System Id

System ID of a neighbor.

Type
Neighbor type:
  • L1 LAN
  • L2 LAN
  • P2P

Interface

Interface connected to the neighbor.

State
Changes in the IS-IS neighbor relationship status:
  • Init -> Up
  • Up -> Down
  • Up -> Init
  • Down -> Up
  • IPv4/IPv6 -> IPv4
  • IPv4/IPv6 -> IPv6
  • IPv4 -> IPv4/IPv6
  • IPv6 -> IPv4/IPv6
  • IPv4 -> IPv6
  • IPv6 -> IPv4
  • L12 -> L2
  • L2 -> L12

Details
Causes for IS-IS neighbor relationship changes:
  • Circuit down
  • BFD down
  • Hold timer expired
  • New adjacency created
  • Clear neighbor
  • Multiple P2P adjacency
  • Adjacency usage mismatch
  • Internal error
  • Memory low
  • P2P circuit ID conflict
  • Area mismatch
  • Three way down
  • Three way init
  • Three way up
  • Protocol change
  • Mt usage mismatch
  • Peer state change
  • Peer level change

display isis lsdb

Function

The display isis lsdb command displays information about IS-IS LSDBs.

Format

display isis process-id lsdb [ { level-1 | level-2 } | verbose | { local | lsp-id | is-name symbolic-name } ] *

display isis lsdb [ { level-1 | level-2 } | verbose | { local | lsp-id | is-name symbolic-name } ] * [ process-id | vpn-instance vpn-instance-name ]

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
level-1 Displays Level-1 LSDBs. If no level is specified, Level-1 and Level-2 LSDBs are displayed. -
level-2 Displays Level-2 LSDBs. If no level is specified, Level-1 and Level-2 LSDBs are displayed. -
verbose Displays detailed information about IS-IS LSDBs. -
local Displays information about the local LSDB. -
lsp-id Specifies an LSP ID. The value is in dotted decimal notation. The value ranges from 16 to 20 in ####.####.####.##-## format, such as 0050.0500.5004.00-00.
is-name symbolic-name Specifies the dynamic host name in is-name or is-name.##-## format. ##-## indicates the pseudonode ID-LSP fragment ID. The value is a string of 1 to 70 characters.
vpn-instance vpn-instance-name Displays the LSDB of the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis lsdb command to check information about IS-IS LSDBs.

Example

# Display IS-IS LSDB information.

<HUAWEI> display isis lsdb
                        Database information for ISIS(1)
                        --------------------------------
                          Level-2 Link State Database
LSPID                 Seq Num      Checksum      Holdtime      Length  ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0001.00-00  0x0000017a   0xa21c        846           84      0/0/0
2222.2222.2222.00-00* 0x000001ce   0xbdcc        845           111     0/0/0
3333.3333.3333.00-00  0x00000013   0x8847        1004          84      0/0/0
3333.3333.3333.01-00  0x0000000b   0x95bc        1004          55      0/0/0
Total LSP(s): 4
    *(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
           ATT-Attached, P-Partition, OL-Overload
Table 7-99  Description of the display isis lsdb command output

Item

Description

LSPID

LSP ID.

Seq Num

LSP sequence number.

Checksum

LSP checksum.

Holdtime

LSP holdtime.

Length

LSP length.

ATT/P/OL
  • ATT: Attach bit
  • P: partition bit
  • OL: overload bit

Total LSP(s)

Number of LSPs.

*/+
  • *(In TLV): Leaking route.
  • *(By LSPID): Locally generated LSP.
  • +: Locally generated extended LSP.

# Display detailed information about IS-IS LSDB.

<HUAWEI> display isis lsdb verbose

                        Database information for ISIS(1)
                        --------------------------------

                          Level-1 Link State Database

LSPID                 Seq Num      Checksum      Holdtime      Length  ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0001.00-00  0x00000010   0xc776        0 (724)       36      0/0/0
 SOURCE       0000.0000.0001.00
 NLPID        IPV4                                                              
 AREA ADDR    10                                                                
 INTF ADDR    10.22.21.1                                                        
 NBR  ID      0000.0000.0002.02  COST: 10 
 IP-Internal  10.22.21.0      255.255.255.0    COST: 10 

0000.0000.0003.00-00* 0x00000026   0x6fb4        1145          350     0/0/0
 SOURCE       0000.0000.0003.00
 HOST NAME    RouterA 
 NLPID        IPV4
 NLPID        IPV6
 AREA ADDR    10
 INTF ADDR    10.1.1.2
 INTF ADDR    10.1.2.2
 INTF ADDR V6 FC00:1::1
 Topology     Standard
 NBR  ID      0000.0000.0001.00  COST: 10
+NBR  ID      0000.0000.0001.00  COST: 10
 IP-Internal  10.1.1.0       255.255.255.0    COST: 10
 IP-Internal  10.1.2.0       255.255.255.0    COST: 10
+IP-Extended  10.1.1.0       255.255.255.0    COST: 10
+IP-Extended  10.1.2.0       255.255.255.0    COST: 10
 IPV6         FC00:1::/64                        COST: 10
Total LSP(s): 2
    *(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
           ATT-Attached, P-Partition, OL-Overload


                          Level-2 Link State Database

LSPID                 Seq Num      Checksum      Holdtime      Length  ATT/P/OL
-------------------------------------------------------------------------------
0000.0000.0003.00-00* 0x0000001c   0x9b0d        1131          233     0/0/0
 SOURCE       RouterA.00 ORG ID: RouterA.00 ORG ID: 0000.0000.0003.00
 HOST NAME    RouterA
 NLPID        IPV4
 NLPID        IPV6
 AREA ADDR    10
 INTF ADDR    10.1.1.2
 INTF ADDR    10.1.2.2
 INTF ADDR V6 FC00:1::1
 Topology     Standard
 NBR  ID      0000.0000.0004.00  COST: 10
+NBR  ID      0000.0000.0004.00  COST: 10
+MT NBR ID    0000.0000.0004.00  COST: 10          
 IP-Internal  10.1.1.0       255.255.255.0    COST: 10
 IP-Internal  10.1.2.0       255.255.255.0    COST: 10
+IP-Extended  10.1.1.0       255.255.255.0    COST: 10
+IP-Extended  10.1.2.0       255.255.255.0    COST: 10
 IPV6         FC00:1::/64                        COST: 10

0000.0000.0003.00-01* 0x00000005   0x5ec1        1129          70      0/0/0
 SOURCE       RouterA.00
Auth: *****     Len: --     Type: MD5
 IP-External  10.1.3.0       255.255.255.0    COST: 0
+IP-Extended  10.1.3.0       255.255.255.0    COST: 0
Total LSP(s): 2
    *(In TLV)-Leaking Route, *(By LSPID)-Self LSP, +-Self LSP(Extended),
           ATT-Attached, P-Partition, OL-Overload
Table 7-100  Description of the display isis lsdb verbose command output

Item

Description

SOURCE

System ID of the source node.

ORG ID

Source system ID of the virtual system.

HOST NAME

Dynamic host name.

Auth

Authentication password.

Len

Authentication password length.

Type

Authentication type:

  • Plain Text: indicates that the password is sent in plain text.

  • MD5: indicates that the password is encrypted using the MD5 algorithm.

  • CRYPTO_AUTH: The password is encrypted with the HMAC-SHA256 encryption algorithm.

NLPID

Supported network protocol.

  • IPV4: supported the IPv4 network protocol.
  • IPV6: supported the IPv6 network protocol.

AREA ADDR

Area address.

INTF ADDR

Interface IPv4 address.

INTF ADDR V6

Interface IPv6 address.

Topology

Topology type.

NBR ID

System ID of a neighbor.

+NBR ID

System ID of a neighbor, which can carry TE information.

+MT NBR ID

Neighbor ID in the MT topology.

COST

Route cost.

IP-Internal

Internal IPv4 routing information.

IP-External

External IPv4 routing information.

+IP-Extended

Extended IP routing information, which can carry TE information.

IPV6

Internal IPv6 routing information.

display isis mesh-group

Function

The display isis mesh-group command displays the configuration of the IS-IS mesh-group.

Format

display isis mesh-group [ process-id | vpn-instance vpn-instance-name ]

display isis process-id mesh-group

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis mesh-group command to check the configuration of the IS-IS mesh-group.

Example

# Display information about the configured IS-IS mesh-group.

<HUAWEI> display isis mesh-group
               Mesh Group information for ISIS(1)
----------------------------------------------------------------------
Interface          Status
Vlanif10            100
Vlanif20            100
Table 7-101  Description of the display isis mesh group command output

Item

Description

Interface

Type and number of the interface in the mesh-group.

Status

Mesh-group number.
Related Topics

display isis migp-routing

Function

The display isis migp-routing command displays IS-IS Multicast IGP (MIGP) routing information.

Format

display isis [ process-id ] migp-routing [ ip-address [ mask | mask-length ] | { level-1 | level-2 } | verbose ] *

Parameters

Parameter Description Value
process-id Specifies the IS-IS process ID. The value is an integer ranging from 1 to 65535.
ip-address Displays the route with the specified destination address. It is in dotted decimal notation.
mask Specifies the mask of the ip address. It is in dotted decimal notation.
mask-length Specifies the mask length. The value is an integer ranging from 0 to 32.
level-1 Displays IS-IS Level-1 routes. -
level-2 Displays IS-IS Level-2 routes. -
verbose Displays the administrative tag of the route. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis migp-routing command to view the physical interface of the route with the outgoing interface as a TE tunnel interface.

Example

# Display IS-IS MIGP routing information.

<HUAWEI> display isis migp-routing

                       MIGP Route information for ISIS(1)
                       ----------------------------------

                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop          Flags
--------------------------------------------------------------------------------
 192.168.3.0/24       40         NULL    Vlanif10        10.0.1.1         A/-
 10.5.5.5/32          30         NULL    Vlanif10        10.0.1.1         A/-
 10.4.4.4/32          20         NULL    Vlanif10        10.0.1.1         A/-
 10.0.2.0/24          20         NULL    Vlanif10        10.0.1.1         A/-
 10.0.3.0/24          30         NULL    Vlanif10        10.0.1.1         A/-
            Flags: A-Added to MIGP, U-Up/Down Bit Set
Table 7-102  Description of the display isis migp-routing command output

Item

Description

IPV4 Destination

Indicates the IPv4 destination address and the mask.

IntCost

Indicates the internal cost.

ExtCost

Indicates the external cost.

ExitInterface

Indicates the outgoing interface of the IS-IS route.

Next Hop

Indicates the next hop of the IS-IS route.
Flags

  • A-Added to MIGP

  • U-Up/Down Bit Set
Indicates routing information flags:

  • A-Added to MIGP: indicates that a route is added to the MIGP table.

  • U-Up/Down Bit SetU-Up/Down Bit Set: indicates the Up/Down bit.

 
<HUAWEI> display isis migp-routing verbose

                       MIGP Route information for ISIS(1)
                       ----------------------------------

                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 192.168.3.0/24     Int. Cost : 40              Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1               Flag      : A/-
      
 Priority   : Low
 NextHop    :                    Interface :                 ExitIndex :
    10.0.1.1                           Vlanif10                  0x00000009

 IPV4 Dest  : 10.5.5.5/32        Int. Cost : 30              Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1               Flag      : A/-
      
 Priority   : Low
 NextHop    :                    Interface :                 ExitIndex :
    10.0.1.1                           Vlanif10                  0x00000009

 IPV4 Dest  : 10.4.4.4/32        Int. Cost : 20              Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1               Flag      : A/-
      
 Priority   : Low
 NextHop    :                    Interface :                 ExitIndex :
    10.0.1.1                           Vlanif10                  0x00000009

 IPV4 Dest  : 10.0.2.0/24        Int. Cost : 20              Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1               Flag      : A/-
      
 Priority   : Low
 NextHop    :                    Interface :                 ExitIndex :
    10.0.1.1                           Vlanif10                  0x00000009

 IPV4 Dest  : 10.0.3.0/24        Int. Cost : 30              Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1               Flag      : A/-
      
 Priority   : Low
 NextHop    :                    Interface :                 ExitIndex :
    10.0.1.1                           Vlanif10                  0x00000009

            Flags: A-Added to MIGP, U-Up/Down Bit Set
Table 7-103  Description of the display isis migp-routing verbose command output

Item

Description

IPV4 Dest

Indicates the IPv4 destination address and the mask.

Int.Cost

Indicates the internal cost.

Ext.Cost

Indicates the external cost.

Admin Tag

Indicates the administrative tag of the IS-IS route.

Src Count

Indicates the number of source addresses to the same destination.
Flags

  • A-Added to MIGP

  • U-Up/Down Bit Set
Indicates the routing information flags.

  • A-Added to MIGP: indicates that a route is added to the MIGP table.

  • U-Up/Down Bit Set: indicates the Up/Down bit.

Priority
Convergence priorities of IS-IS routes
  • Critical
  • High
  • Medium
  • Low

Next Hop

Indicates the next hop of the route.

Interface

Indicates the outgoing interface of the IS-IS route.

ExitIndex

Indicates the index value of the outgoing interface.

display isis name-table

Function

The display isis name-table command displays the mapping between the dynamic hostnames of IS-IS routers and the system IDs.

Format

display isis name-table [ process-id | vpn-instance vpn-instance-name ]

display isis process-id name-table

Parameters

Parameter Description Value
process-id

Displays the mapping between dynamic hostnames of IS-IS routers and system IDs in a specified IS-IS process.

 The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name

Displays the mapping between dynamic hostnames of IS-IS routers and system IDs in a specified VPN instance.

 The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

After dynamic hostnames are configured, you can run the display isis name-table command to check the mapping between the dynamic hostnames and system IDs.

Example

# Configure a name for the local IS-IS system.

[Switch] isis
[Switch-isis-1] is-name RUTA

# Configure a static name mapping for the remote IS-IS system (0000.0000.0041).

[Switch-isis-1] is-name map 0000.0000.0041 RUTB

# Display the IS-IS system name table.

<Switch> display isis name-table
              Name table information for ISIS(1)
System ID               Hostname       Type
---------------------------------------------------------------
6789.0000.0001          RUTA           DYNAMIC
0000.0000.0041          RUTB           STATIC
Table 7-104  Description of the display isis name-table command output

Item

Description

System ID

System ID of the current IS-IS device. To set the system ID, run the network-entity command.

Hostname

Host name of the device. To set a host name for the local or remote device, run the is-name or is-name map command.

Type

Type of the mapping between the host name and system ID: static or dynamic.

display isis peer

Function

The display isis peer command displays IS-IS neighbor information.

Format

display isis process-id peer [ verbose ]

display isis peer [ verbose ] [ process-id | vpn-instance vpn-instance-name ]

display isis peer interface interface-type interface-number [ verbose ]

Parameters

Parameter Description Value
verbose

Displays detailed IS-IS neighbor information, including the area address, period during which the neighbor remains Up, and IP address of its directly connected interface.

 -
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
interface interface-type interface-number Specifies the type and number of an interface. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

In an IS-IS area, if you need to check whether two devices can communicate properly, run the display isis peer command to view information about the neighbor, including the neighbor status, period during which the neighbor remains Up, and neighbor type.

Example

# Display information about IS-IS neighbors.

<HUAWEI> display isis peer
                          Peer information for ISIS(1)

  System Id     Interface          Circuit Id       State HoldTime Type     PRI
-------------------------------------------------------------------------------
0000.0000.0001   Vlanif10          0000.0000.0001.01   Up    24s   L1(L1L2)  64
0000.0000.0001   Vlanif10          0000.0000.0001.01   Up    24s   L2(L1L2)  64

Total Peer(s): 2
Table 7-105  Description of the display isis peer command output

Item

Description

System Id

System ID of the neighbor.

Interface

Type and number of the interface.

Circuit Id

Circuit ID.

State
Neighbor status:
  • Up: indicates that the neighbor is Up and the two ends can communicate.
  • Init: indicates that the local end can receive packets from the remote end but the remote end cannot receive packets from the local end. This status is displayed when authentication is configured on the remote end.
  • Down: indicates that the neighbor is Down. This is the initial status, indicating that no message is received from the neighbor. In most cases, this status is not displayed.

HoldTime

Neighbor holdtime.

Type
Neighbor type:
  • L1: indicates that the neighbor type is Level-1 and interfaces on both ends are Level-1 interfaces.
  • L2: indicates that the neighbor type is Level-2 and interfaces on both ends are Level-2 interfaces.
  • L1(L1L2): indicates that the neighbor type is Level-1 and interfaces on both ends are Level-1-2 interfaces.
  • L2(L1L2): indicates that the neighbor type is Level-2 and interfaces on both ends are Level-1-2 interfaces.

PRI

Priority of the neighbor in DIS election.

# Display detailed information about IS-IS neighbor.

<HUAWEI> display isis peer verbose
                          Peer information for ISIS(1)

  System Id     Interface          Circuit Id          State  HoldTime   Type     PRI
-------------------------------------------------------------------------------
0000.0000.0001  Vlanif10           0000.0000.0001.01      Up     26s     L1(L1L2)   64
  MT IDs supported     : 0(UP) 
  Local MT IDs         : 0
  Area Address(es)     : 10
  Peer IP Address(es)  : 10.10.10.1
  Uptime               : 00:00:19
  Adj Protocol         : IPV4
  Restart Capable      : YES
  Suppressed Adj       : NO

0000.0000.0001  Vlanif10           0000.0000.0001.01      Up     27s     L2(L1L2)   64
  MT IDs supported     : 0(UP) 
  Local MT IDs         : 0
  Area Address(es)     : 10
  Peer IP Address(es)  : 10.10.10.1
  Uptime               : 00:00:19
  Adj Protocol         : IPV4
  Restart Capable      : YES
  Suppressed Adj       : NO


Total Peer(s): 2
Table 7-106  Description of the display isis peer verbose command output

Item

Description

MT IDs supported

IDs of topology instances supported by the remote interface.

Local MT IDs

IDs of topology instances supported by the local interface.

Area Address(es)

Area addresses of the neighbor.

Peer IP Address(es)

IP address of the remote interface.

Uptime

Period during which the neighbor remains Up.

Adj Protocol

Protocol used for establishing the adjacency.

Restart Capable
Whether GR is supported:

  • YES: indicates that GR is supported.

  • NO: indicates that GR is not supported.

Suppressed Adj
Whether neighbor suppression is supported:

  • YES: indicates that neighbor suppression is supported.

  • NO: indicates that neighbor suppression is not supported.

Total Peer(s)

Number of neighbors.

display isis purge packet

Function

The display isis purge packet command displays statistics about received IS-IS purge LSPs carrying the POI TLV.

Format

display isis process-id purge packet [ packet-number ]

display isis purge packet process-id [ packet-number ]

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer ranging from 1 to 65535.
packet-number Specifies the number of purge LSPs whose statistics are to be displayed. The value is an integer ranging from 1 to 20.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

To check statistics about received IS-IS purge LSPs carrying the POI TLV, run the display isis purge packet command. You can specify packet-number in the command to check statistics about a specified number of purge LSPs, and the maximum value of packet-number is 20. If its value is set to 20:
  • The first two displayed purge LSPs are sent by the local source system, with fragment number 0, one of which is Level-1, and the other is Level-2.
  • The first 10 displayed purge LSPs are generated locally, and the next 10 purge LSPs are from neighbors. The purge LSPs are displayed in reverse order of the time when they were received. If the LSP ID is followed by an asterisk (*), the purge LSP is generated locally.

Example

# Display statistics about received IS-IS purge LSPs carrying the POI TLV.

<HUAWEI> display isis purge packet 1 10
                 Purge LSP packet for ISIS(1) 
------------------------------------------------------------ 
Packet information(Index 1): 
----------------------------------------------------- 
Received LSPID      :  0000.0000.0027.00-00* 
Source Interface    :  Vlanif100 
Time                :  2015-1-22 13:55:06 
Level               :  Level-2 
PDU Type            :  20(Level-2 LSP) 
PDU Length          :  55 
Sequence Number     :  0x00000015 
Checksum            :  0xc891 
POI NAME            :  0000.0000.0004 
POI NAME(Neighbor)  :  0000.0000.0005   
HOST NAME           :  RT4-Pro1 
Auth Type           :  **               
0010: 83 1b 01 06 12 01 00 03 00 43 00 00 00 00 00 00 
0020: 00 27 00 00 00 01 6a 6c bd ed 01 0d 07 01 00 00 
0030: 00 00 00 01 89 0a 52 54 31 2d 50 72 6f 2d 30 31 
0040: ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** 
0050: ** ** **                          
-----------------------------------------------------
    **-Authentication TLV, *(By LSPID)-Self LSP
Table 7-107  Description of the display isis purge packet command output

Item

Description

Received LSPID

ID of a received purge LSP

Source Interface

Source interface of a received purge LSP

Time

Time when a purge LSP was received

Level

Level of a received purge LSP

PDU Type

Type of received purge LSP

PDU Length

Length of a received purge LSP

Sequence Number

Sequence number (LSN) of a received purge LSP

Checksum

Checksum of a received purge LSP

POI NAME

POI TLV carried in a received purge LSP

POI NAME(Neighbor)

Neighbor system ID in the POI TLV carried in a received purge LSP

HOST NAME

Dynamic hostname carried in a received purge LSP

Auth Type

Authentication information carried in a received purge LSP

display isis route

Function

The display isis route command displays IS-IS routing information.

Format

display isis route [ process-id | vpn-instance vpn-instance-name ] [ ipv4 ] [ verbose | [ level-1 | level-2 ] | ip-address [ mask | mask-length ] ] *

display isis route [ process-id | vpn-instance vpn-instance-name ] ipv6 [ verbose | [ level-1 | level-2 ] | ipv6-address [ prefix-length ] ] *

display isis process-id route [ ipv4 ] [ verbose | [ level-1 | level-2 ] | ip-address [ mask | mask-length ] ] *

display isis process-id route ipv6 [ verbose | [ level-1 | level-2 ] | ipv6-address [ prefix-length ] ] *

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
ipv4 Displays IPv4 routes. If this parameter is not specified, both IPv4 and IPv6 IS-IS routes are displayed. -
verbose Displays detailed routing information. -
level-1 Displays Level-1 IS-IS routes. -
level-2 Displays Level-2 IS-IS routes. -
ip-address Displays the routes with the specified IPv4 destination address. The value is in dotted decimal notation.
mask Specifies the mask of an IP address. The value is in dotted decimal notation.
mask-length Specifies the mask length of an IP address. The value is an integer that ranges from 0 or 32.
ipv6 Displays IPv6 routes. If this parameter is not specified, both IPv4 and IPv6 IS-IS routes are displayed. -
ipv6-address Displays the routes with the specified IPv6 destination address. The value is a 32-digit hexadecimal number, in X:X:X:X:X:X:X:X format.
prefix-length Specifies the prefix length of an IPv6 address. The value is an integer that ranges from 0 to 128.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis route command to check IS-IS routing information.

Example

# Display all IS-IS routes.

<HUAWEI> display isis route
                                                                                
                         Route information for ISIS(1)                          
                         -----------------------------                          
                                                                                
                        ISIS(1) Level-1 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.2.1.0/24          10         NULL    Vlanif10        Direct          D/-/L/- 
172.18.0.0/16        20         NULL    Vlanif10        10.2.1.1        A/-/L/- 
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                
                                                                                
                                                                                
                        ISIS(1) Level-2 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.2.1.0/24          10         NULL    Vlanif10        Direct          D/-/L/- 
172.18.0.0/16        20         NULL    Vlanif10        10.2.1.1        A/-/L/-                                
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set
Table 7-108  Description of the display isis route command output

Item

Description

IPV4 Destination

IPv4 destination address and mask.

IPV6 Dest.

IPv6 destination address and mask.

IntCost

IPv4 internal cost or IS-IS route cost. To change the IS-IS IPv4 route cost, run the circuit-cost or isis cost command to set the link cost of an IS-IS IPv4 interface.

ExtCost
IPv4 external cost or cost of routes imported from other routing protocols. To set the cost of imported routes, run the import-route (IS-IS) command.
NOTE:

The costs of external routes imported using the import-route cost-type external command are displayed in this field to differentiate the costs of IS-IS routes.

Cost

IPv6 route cost. To change the IS-IS IPv6 route cost, run the ipv6 circuit-cost or isis ipv6 cost command to set the link cost of an IS-IS IPv6 interface.

ExitInterface

Outbound interface of a route.

NextHop

Next hop address of a route. This field displays Direct if the destination network segment is the direct network segment.

Flags
Route flag:
  • D-Direct: indicates a direct route.
  • A-Added to URT: indicates that a route is added to the unicast routing table.
  • L-Advertised in LSPs: indicates that a route is advertised through an LSP.
  • S-IGP Shortcut: indicates that the interface on which IGP-Shortcut is enabled exists on the path to the destination.
  • U-Up/Down Bit Set: indicates the Up/Down bit.

# Display IS-IS IPv4 routes.

<HUAWEI> display isis route ipv4
                                                                                
                         Route information for ISIS(1)                          
                         -----------------------------                          
                                                                                
                        ISIS(1) Level-1 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.1.1.0/24          10         NULL    Loop1           Direct          D/-/L/- 
10.2.2.0/24          10         NULL    Loop2           Direct          D/-/L/- 
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                
                                                                                
                                                                                
                        ISIS(1) Level-2 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.1.1.0/24          10         NULL    Loop1           Direct          D/-/L/- 
10.2.2.0/24          10         NULL    Loop2           Direct          D/-/L/- 
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set

# Display IS-IS IPv6 routes.

<HUAWEI> display isis route ipv6
                         Route information for ISIS(1)                          
                         -----------------------------                          
                                                                                
                        ISIS(1) Level-1 Forwarding Table                        
                        --------------------------------                        
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                
                                                                                
                                                                                
                        ISIS(1) Level-2 Forwarding Table                        
                        --------------------------------                        
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set

# Display detailed IS-IS routing information.

<HUAWEI> display isis route verbose
                         Route information for ISIS(1)
                         -----------------------------

                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif10                 0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif20                 0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/L/-
 Priority   : Low
 NextHop    :                    Interface :               ExitIndex :
    10.2.0.2                           Vlanif20                 0x00000003
    10.0.0.2                           Vlanif10                 0x00000005

 IPV4 Dest  : 10.4.1.1/32        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/L/-
 Priority   : Medium
 NextHop    :                    Interface :               ExitIndex :
    10.0.0.2                           Vlanif10                 0x00000005
 (B)10.2.0.2                           Vlanif20                 0x00000003

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                



                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif10                 0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif20                 0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-
 Priority   : Low

 IPV4 Dest  : 10.3.1.1/32        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-
 Priority   : Medium

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set
Table 7-109  Description of the display isis route verbose command output

Item

Description

IPV4 Dest

IPv4 destination address and mask.

Int.Cost

IPv4 internal cost, the cost of an IS-IS route.

Ext.Cost
IPv4 external cost, the cost of other protocol route imported by IS-IS.
NOTE:

The costs of non-IS-IS routes imported by the import-route cost-type external command are displayed in this field so that the costs of non-IS-IS routes are kept independently from the costs of IS-IS routes.

Admin Tag

Administrative tag.

Src Count

Number of source addresses to the same destination.

Priority
Convergence priority of IS-IS routes:
  • Critical
  • High
  • Medium
  • Low
To set the convergence priority of IS-IS routes, run the prefix-priority (IS-IS) command.

NextHop

Next hop of a route. The next hop (B) tag of a route is a backup route tag.

Interface

Outbound interface of a route.

ExitIndex

Index of the outbound interface.

Flags

Flags of routing information

display isis spf-log

Function

The display isis spf-log command displays IS-IS SPF logs.

Format

display isis spf-log [ process-id | vpn-instance vpn-instance-name ] [ [ level-1 | level-2 ] | ipv6 | verbose ]*

display isis process-id spf-log [ [ level-1 | level-2 ] | ipv6 | verbose ]*

Parameters

Parameter Description Value
process-id Specifies an IS-IS process ID. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Specifies the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
ipv6 Displays SPF logs in IPv6 topologies. -
level-1 Displays Level-1 SPF logs. -
level-2 Displays Level-2 SPF logs. -
verbose Displays detailed information about SPF logs. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

If the SPT calculated by IS-IS is incorrect, you can run the display isis spf-log command to diagnose the fault. The command displays information about SPF calculation, such as the start time and duration of the SPF calculation, number of nodes, and events that trigger the SPF calculation. You can determine whether the events are the cause of the SPF calculation fault based on the start time of the SPF calculation.

Example

# Display IS-IS SPF logs.

<HUAWEI> display isis spf-log
                                                                                
                        SPF Log information for ISIS(10)                        
                        --------------------------------                        
                                                                                
                            ISIS(10) Level-1 SPF Log                            
                            ------------------------                            
                                                                                
 StartTime  Duration  Nodes  Count  Last Trigger LSP      Trigger Event         
------------------------------------------------------------------------------- 
 2013-09-05 10:14:48+00:00                                                            
            0         1      1      NULL                  ISPF_CIRC_DR_CHANGE   
 2013-09-05 10:13:23+00:00                                                            
            1         1      2      NULL                  FULL_SPF              
                                                                                
                            ISIS(10) Level-2 SPF Log                            
                            ------------------------                            
                                                                                
 StartTime  Duration  Nodes  Count  Last Trigger LSP      Trigger Event         
------------------------------------------------------------------------------- 
 2013-09-05 10:14:48+00:00                                                            
            1         1      1      NULL                  ISPF_CIRC_DR_CHANGE   
 2013-09-05 10:13:23+00:00                                                            
            1         1      2      NULL                  FULL_SPF
Table 7-110  Description of the display isis spf-log command output

Item

Description

StartTime

Start time of SPF calculation.

Duration

Duration of SPF calculation.

Nodes

Number of nodes in SPF calculation.

Count

Number of times SPF calculated is triggered.

Last Trigger LSP

LSP that triggers the last SPF calculation:

  • NULL indicates that the LSP is local.
  • LSP ID (specific ID) indicates that the LSP is not local.

Trigger Event

Event that triggers the last SPF calculation:

  • NEWAREA indicates that a new NET is configured.
  • TUNNEL_ADJ indicates that a tunnel neighbor relationship is established.
  • ADJDOWN indicates that a tunnel neighbor goes Down.
  • NEWLSP indicates that the router receives an LSP of a new process.
  • LSPCHANGE indicates that the received LSP is different from local LSPs.
  • RST_T2_CANCEL indicates that the GR T2 Timer is disabled.
  • RST_T3_EXPIRE indicates that the GR T3 Timer expires.
  • RESTART_COMPLETE indicates that the GR is over.
  • CIRC_VLINK_CHANGE indicates that the status of the VLink interface changes.
  • PRC_IPV4_PREFIX_ADD indicates that an IPv4 route is added.
  • PRC_IPV4_PREFIX_DEL indicates that an IPv4 route is deleted.
  • PRC_IPV4_PREFIX_MODIFY indicates that an IPv4 route is modified.
  • PRC_IPV4_PREFIX_MIGP_ADD indicates that an MIGP IPv4 route is added.
  • PRC_IPV4_PREFIX_MIGP_DEL indicates that an MIGP IPv4 route is deleted.
  • PRC_IPV4_PREFIX_MIGP_MODIFY indicates that an MIGP IPv4 route is modified.
  • PRC_IPV6_PREFIX_ADD indicates that an IPv6 route is added.
  • PRC_IPV6_PREFIX_DEL indicates that an IPv6 route is deleted.
  • PRC_IPV6_PREFIX_MODIFY indicates that an IPv6 route is modified.
  • ISPF_ADJ_STATE_CHANGE indicates that the IS-IS neighbor status changes.
  • ISPF_ADJ_USAGE_CHANGE indicates that the IS-IS neighbor level changes.
  • ISPF_ADJ_PROT_USAGE_CHANGE indicates that the protocol used by the IS-IS neighbor changes.
  • ISPF_ADJ_NEXTHOP_CHANGE indicates that the next hop of the IS-IS neighbor changes.
  • ISPF_CIRC_METRIC_CHANGE indicates that the cost on the interface changes.
  • ISPF_CIRC_DR_CHANGE indicates that the DIS changes.
  • ISPF_NODE_DEL indicates that the nodes in the SPT change.
  • ISPF_NODE_OLOAD_CHANGE indicates that the overload bit of the system changes.
  • ISPF_LINK_ADD indicates that a new link is added to the SPT.
  • ISPF_LINK_DEL indicates that a link is deleted from the SPT.
  • ISPF_LINK_METRIC_CHANGE indicates that the cost of a link changes.
  • FULL_SPF indicates that a full SPF calculation is triggered.
  • AREA_CFG_CHANGE indicates that the area of the process changes.
  • AREA_LEARNT_CHANGE indicates that the area of the IS-IS neighbor changes.
  • ISPF_TUNNEL_TYPE_CHANGE indicates that the tunnel type changes.
  • PRC_LEAVE_MAN_OVERLOAD indicates that the system exits the set-overload state that is set manually.
  • PRC_IPV4_SELFLSP_CHANGE indicates that the IPv4 route in the local LSP changes.
  • PRC_IPV6_SELFLSP_CHANGE indicates that the IPv6 route in the local LSP changes.
  • PRC_ALIAS_TLV_CHANGE indicates that the ALIAS TLV in the LSP changes.
  • LFA_LINK_ADD indicates that a link is added to the routes for FRR.
  • LFA_LINK_DEL indicates that a link is deleted from the routes for FRR.
  • LFA_LINK_CHANGE indicates that the links of the routes for FRR change.
  • LFA_NODE_ADD indicates that a node is added along the links of the routes for FRR.
  • LFA_NODE_DEL indicates that a node is deleted from the links of the routes for FRR.
  • LFA_NODE_CHANGE indicates that the nodes along the links of the routes for FRR change.
  • KEY_RESRORE indicates that the local device receives an indirect next hop key.

display isis spf-tree

Function

The display isis spf-tree command displays the topology of the SPF tree that is generated by IS-IS.

Format

display isis spf-tree [ systemid systemid | dname dname ] [ [ level-1 | level-2 ] | ipv6 | verbose ] * [ process-id | vpn-instance vpn-instance-name ]

display isis process-id spf-tree [ systemid systemid | dname dname ] [ [ level-1 | level-2 ] | ipv6 | verbose ] *

display isis process-id spf-tree statistics [ [ level-1 | level-2 ] | ipv6 ] *

display isis spf-tree statistics [ [ level-1 | level-2 ] | ipv6 ] * [ process-id | vpn-instance vpn-instance-name ]

Parameters

Parameter Description Value
systemid systemid Displays the SPF tree of the switch with a specified system ID or pseudonode ID. The value is in XXXX.XXXX.XXXX[.XX] format.
dname dname Displays the SPF tree of the switch with a specified dynamic name. The value is a string of 1 to 64 characters without spaces.When double quotation marks are used around the string, spaces are allowed in the string.
level-1 Displays Level-1 SPF tree. -
level-2 Displays Level-2 SPF tree. -
ipv6 Displays SPF tree in IPv6 topologies. -
verbose Displays detailed information about SPF tree. -
process-id Display SPF tree in a specified IS-IS process. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Displays SPF tree of the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.
statistics Displays SPF tree statistics, including information about links and nodes on the SPF tree. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can specify statistics to view the current status of the SPF tree. The generated SPF tree can be used to calculate routes only when the SPF calculation status is Completed, that is, incremental SPF (ISPF) calculation is complete.

Example

# Display information about the SPF tree.

<HUAWEI> display isis spf-tree
                         Shortest Path Tree for ISIS(1)
                         ------------------------------

         Flags:   T-System is on SPF TREE  R-System is directly reachable
                  O-System is Overload     D-System or Link is to be deleted
                  C-Neighbor is child      P-Neighbor is parent
                  G-Cost gets greater      L-Cost gets lower
                  H-Nexthop is changed     U-Protocol usage is changed
                  V-Link is involved       N-Link is a new path
                  S-Link is IGP Shortcut   *-Relative cost
                       ISIS(1) Level-1 Shortest Path Tree
                       ----------------------------------

 SpfNode           NodeFlags  NeighbourNode     LinkCost   LinkFlags
------------------------------------------------------------------------
------------------------------------------------------------------------
 0000.0000.0001.00 T/-/-/-   >0000.0000.0002.01       10   P/-/-/-/-/-/-
>0000.0000.0002.00 T/-/-/-    0000.0000.0003.01       10   C/-/-/-/-/-/-
                             >0000.0000.0002.01       10   C/-/-/-/-/-/-
                              0000.0000.0004.00      -10*  C/-/-/-/S/-/-
>0000.0000.0002.01 T/R/-/-    0000.0000.0001.00        0   C/-/-/-/-/-/-
                             >0000.0000.0002.00        0   P/-/-/-/-/-/-
 0000.0000.0003.00 T/-/-/-    0000.0000.0004.02       10   C/-/-/-/-/-/-
                              0000.0000.0003.01       10   P/-/-/-/-/-/-
 0000.0000.0003.01 T/R/-/-    0000.0000.0003.00        0   C/-/-/-/-/-/-
                             >0000.0000.0002.00        0   P/-/-/-/-/-/-
 0000.0000.0004.00 T/-/-/-    0000.0000.0004.02       10   P/-/-/-/-/-/-
                              0000.0000.0004.01       10   C/-/-/-/-/-/-
 0000.0000.0004.01 T/-/-/-    0000.0000.0004.00        0   P/-/-/-/-/-/-
                              0000.0000.0005.00        0   C/-/-/-/-/-/-
 0000.0000.0004.02 T/-/-/-    0000.0000.0004.00        0   C/-/-/-/-/-/-
                              0000.0000.0003.00        0   P/-/-/-/-/-/-
 0000.0000.0005.00 T/-/-/-    0000.0000.0004.01       10   P/-/-/-/-/-/-
                       ISIS(1) Level-2 Shortest Path Tree
                       ----------------------------------

 SpfNode           NodeFlags  NeighbourNode     LinkCost   LinkFlags
------------------------------------------------------------------------
------------------------------------------------------------------------
 0000.0000.0001.00 T/-/-/-   >0000.0000.0002.01       10   P/-/-/-/-/-/-
>0000.0000.0002.00 T/-/-/-    0000.0000.0003.01       10   C/-/-/-/-/-/-
                             >0000.0000.0002.01       10   C/-/-/-/-/-/-
                              0000.0000.0004.00      -10*  C/-/-/-/S/-/-
>0000.0000.0002.01 T/R/-/-    0000.0000.0001.00        0   C/-/-/-/-/-/-
                             >0000.0000.0002.00        0   P/-/-/-/-/-/-
 0000.0000.0003.00 T/-/-/-    0000.0000.0004.02       10   C/-/-/-/-/-/-
                              0000.0000.0003.01       10   P/-/-/-/-/-/-
 0000.0000.0003.01 T/R/-/-    0000.0000.0003.00        0   C/-/-/-/-/-/-
                             >0000.0000.0002.00        0   P/-/-/-/-/-/-
 0000.0000.0004.00 T/-/-/-    0000.0000.0004.02       10   P/-/-/-/-/-/-
                              0000.0000.0004.01       10   C/-/-/-/-/-/-
 0000.0000.0004.01 T/-/-/-    0000.0000.0004.00        0   P/-/-/-/-/-/-
                              0000.0000.0005.00        0   C/-/-/-/-/-/-
 0000.0000.0004.02 T/-/-/-    0000.0000.0004.00        0   C/-/-/-/-/-/-
                              0000.0000.0003.00        0   P/-/-/-/-/-/-
 0000.0000.0005.00 T/-/-/-    0000.0000.0004.01       10   P/-/-/-/-/-/-
Table 7-111  Description of the display isis spf-tree command output

Item

Description

SpfNode

Node ID in the network topology.

NodeFlags
Node flag:
  • T: The node is on the SPF tree.
  • R: The node is directly reachable.
  • O: The node is overloaded.
  • D: The node is to be deleted.

NeighbourNode

ID of the neighboring node.

LinkCost

Link cost.

LinkFlags
Link flag:
  • C: Neighbor is child
  • P: Neighbor is parent
  • G: Cost gets greater
  • L: Cost gets lower
  • H: Nexthop is changed
  • U: Protocol usage is changed
  • V: Link is involved
  • N: Link is a new path
  • S: Link is IGP Shortcut
  • *: Relative cost

>

Mark of the local node.

# Display detailed information about SPF tree.

<HUAWEI> display isis spf-tree verbose
                         Shortest Path Tree for ISIS(1)                         
                         ------------------------------                         
                                                                                
                       ISIS(1) Level-1 Shortest Path Tree                       
                       ----------------------------------                       
>0000.0000.0001.00                                                              
   Distance            : 0                                                      
   Distance-URT        : 0                                                      
   Flags               : SPT                                                    
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:2 Parents:0 Others:0)                                 
             (1)   0000.0000.0002.01                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)  >0000.0000.0001.01                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
>0000.0000.0001.01                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/Direct/Isolate/V6_Islt                             
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0003.00                                            
                     Cost  : 0                                                  
                             C:0 I:vlanif 10                         
                     Flags : Adj/Child                                          
                                                                                
             (2)  >0000.0000.0001.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.00                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 1                                                      
             (1) 10.1.0.2         IF:vlanif 10  NBR:0000.0000.0002.00            
             (B) 10.0.0.2         IF:vlanif 20  NBR:0000.0000.0003.00            
                                  TYPE:LOOP-FREE  PROTECT:LINK                  
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.02                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)   0000.0000.0002.01                                            
                     Cost  : 10                                                 
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.01                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/Direct/Isolate/V6_Islt                             
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.00                                            
                     Cost  : 0                                                  
                             C:0 I:vlanif 10                         
                     Flags : Adj/Child                                          
                                                                                
             (2)  >0000.0000.0001.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.02                                                              
   Distance            : 20                                                     
   Distance-URT        : 20                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 2                                                      
             (1) 10.1.0.2         IF:vlanif 10  NBR:0000.0000.0002.00            
             (2) 10.0.0.2         IF:vlanif 20  NBR:0000.0000.0003.00            
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:0 Parents:2 Others:0)                                 
             (1)   0000.0000.0002.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
             (2)   0000.0000.0003.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0003.00                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 1                                                      
             (1) 10.0.0.2         IF:vlanif 10  NBR:0000.0000.0003.00            
             (B) 10.1.0.2         IF:vlanif 20  NBR:0000.0000.0002.00            
                                  TYPE:LOOP-FREE  PROTECT:LINK                  
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.02                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)  >0000.0000.0001.01                                            
                     Cost  : 10                                                 
                     Flags : Parent                                             
                                                                                
                                                                                
                       ISIS(1) Level-2 Shortest Path Tree                       
                       ----------------------------------                       
>0000.0000.0001.00                                                              
   Distance            : 0                                                      
   Distance-URT        : 0                                                      
   Flags               : SPT                                                    
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:2 Parents:0 Others:0)                                 
             (1)   0000.0000.0002.01                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)  >0000.0000.0001.01                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
>0000.0000.0001.01                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/Direct/Isolate/V6_Islt                             
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0003.00                                            
                     Cost  : 0                                                  
                             C:0 I:vlanif 10                         
                     Flags : Adj/Child                                          
                                                                                
             (2)  >0000.0000.0001.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.00                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 1                                                      
             (1) 10.1.0.2         IF:vlanif 10  NBR:0000.0000.0002.00            
             (B) 10.0.0.2         IF:vlanif 20  NBR:0000.0000.0003.00            
                                  TYPE:LOOP-FREE  PROTECT:LINK                  
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.02                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)   0000.0000.0002.01                                            
                     Cost  : 10                                                 
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.01                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/Direct/Isolate/V6_Islt                             
   IPv4 Nexthops-URT   : 0                                                      
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.00                                            
                     Cost  : 0                                                  
                             C:0 I:vlanif 10                         
                     Flags : Adj/Child                                          
                                                                                
             (2)  >0000.0000.0001.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0002.02                                                              
   Distance            : 20                                                     
   Distance-URT        : 20                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 2                                                      
             (1) 10.1.0.2         IF:vlanif 10  NBR:0000.0000.0002.00            
             (2) 10.0.0.2         IF:vlanif 20  NBR:0000.0000.0003.00            
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:0 Parents:2 Others:0)                                 
             (1)   0000.0000.0002.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
             (2)   0000.0000.0003.00                                            
                     Cost  : 0                                                  
                     Flags : Parent                                             
                                                                                
 0000.0000.0003.00                                                              
   Distance            : 10                                                     
   Distance-URT        : 10                                                     
   Flags               : SPT/V6_Islt                                            
   IPv4 Nexthops-URT   : 1                                                      
             (1) 10.0.0.2         IF:vlanif 10  NBR:0000.0000.0003.00            
             (B) 10.1.0.2         IF:vlanif 20  NBR:0000.0000.0002.00            
                                  TYPE:LOOP-FREE  PROTECT:LINK                  
   IPv4 Nexthops-MIGP  : 0                                                      
   IPv6 Nexthops       : 0                                                      
   Neighbors: 2 (Children:1 Parents:1 Others:0)                                 
             (1)   0000.0000.0002.02                                            
                     Cost  : 10                                                 
                     Flags : Child                                              
                                                                                
             (2)  >0000.0000.0001.01                                            
                     Cost  : 10                                                 
                     Flags : Parent
Table 7-112  Description of the display isis spf-tree verbose command output

Item

Description

Distance

Cost of the shortest path from the root node to the destination node, excluding the TE tunnel link.

Distance-URT

Cost of the shortest path from the root node to the destination node, including the TE tunnel link.

Flags
Flag:

  • SPT: The node is in the tree.

  • Direct: The node is a direct node.

  • Shortcut: The node is on a shortcut link.

  • Oload: The node is in Overload state.

  • Isolate: The node is not in the tree.

  • MIGP_Islt: The node is not in the MIGP tree.

  • V6_Islt: The node is not in the IPv6 tree.

  • Del: The node will be deleted.

  • Remote: The node is on a tunnel.

IPv4 Nexthops-URT

IPv4 next hop of the node in the unicast routing table.

IPv6 Nexthops

IPv6 next hop of the node in the unicast routing table.

Neighbors

Information about all the neighbors of this node.

Cost

Cost of the link from the root node to this node.

Flags
Relationship with the neighbor:

  • Parent: The neighbor is a parent node.

  • Child: The neighbor is a child node.

IF

Name of the outbound interface.

NBR

System ID of the next hop.

TYPE
Traffic protection type:

  • LOOP-FREE: loop-free protection for the backup next hop

PROTECT
Traffic protection type of IS-IS Auto FRR:

  • NONE: indicates no protection.

  • LINK: indicates link protection.

  • NODE: indicates node protection.

  • LINK-NODE: indicates link and node protection.

# Display the current status statistics of the SPF tree.

<HUAWEI> display isis spf-tree statistics
                   Statistics information of SPT for ISIS(100)
                  -------------------------------------------

                               Level-2 Statistics
                               ------------------
Nodes information:
         Total:                               3605
         Count of nodes in SPT:               3605
         Count of isolate nodes in SPT:       1
         Count of IPv6 isolate nodes in SPT:  3604
         Max Distance of nodes in SPT:        1220
Links information:
         Total:                               14172
         Count of links from Parent to Son:   7085
         Count of links from Son to Parent:   7085
         Count of links that just changed:    0
Status of SPF:                                Completed
Table 7-113  Description of the display isis spf-tree statistics command output

Item

Description

Total (Nodes information)

Total number of nodes.

Count of nodes in SPT

Number of nodes in the SPT tree.

Count of isolate nodes in SPT

Number of isolated nodes in the network topology.

Count of IPv6 isolate nodes in SPT

Number of isolated IPv6 nodes in the network topology.

Max Distance of nodes in SPT

Maximum distance from the root node to the leaf node.

Total (Links information)

Total number of links.

Count of links from Parent to Son

Number of links from the parent node to the child node.

Count of links from Son to Parent

Number of links from the child node to the parent node.

Count of links that just changed

Number of links that just changed.

Status of SPF
Status of SPF calculation:

  • Completed: indicates that SPF calculation is complete.

  • Scheduled: indicates that SPF calculation is triggered but does not start.

  • Running: indicates that SPF calculation is being performed.

display isis statistics

Function

The display isis statistics command displays IS-IS process statistics.

Format

display isis statistics packet [ interface [ interface-type interface-number ] ]

display isis statistics [ updated-lsp [ history ] ] [ level-1 | level-2 | level-1-2 ] [ process-id | vpn-instance vpn-instance-name ]

display isis process-id statistics [ [ [ updated-lsp [ history ] ] [ level-1 | level-2 | level-1-2 ] ] | packet ]

Parameters

Parameter Description Value
packet Displays IS-IS packet statistics. -
interface interface-type interface-number Displays IS-IS packet statistics on a specified interface. -
updated-lsp

Displays real-time data of received LSPs. By default, statistics about the LSPs received within the last 1 hour are displayed.

 -
history

Displays historical data of received LSPs. By default, statistics about the LSPs received within the last 24 hours are displayed.

 -
level-1 Displays IS-IS Level-1 statistics. -
level-2 Displays IS-IS Level-2 statistics. -
level-1-2 Displays IS-IS Level-1-2 statistics. -
process-id Displays statistics in a specified IS-IS process. The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name Displays statistics about the IS-IS multi-instance process in a specified VPN instance. The value must be an existing VPN instance name.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can use the display isis statistics command to view IS-IS process statistics, including the number of routes learned from other IS-IS devices, number of routes imported from other routing protocols, number of locally generated LSPs, and convergence priorities of IS-IS routes.

Example

# Display IS-IS process statistics.

<HUAWEI> display isis statistics


                       Statistics information for ISIS(1)


                       ----------------------------------


                               Level-1 Statistics


                               ------------------


                                                   


Forwarding routes information:


         Total IPV4 Learnt Routes: 0


                         Critical: 0


                         High    : 0


                         Medium  : 0


                         Low     : 0


         Total IPv4 Forwarding Routes: 1


Total IPv6 Learnt Routes: 0
                        Critical: 0       
                        High    : 0
                        Medium  : 0
                        Low     : 0


         Total IPv6 Forwarding Routes: 1


                 


Imported routes information:


         IPv4 Imported Routes:


                         Static: 0       Direct: 0


                         ISIS:   0       BGP:    0


                         RIP:    0       OSPF:   0


         IPv6 Imported Routes:


                         Static: 0       Direct: 0


                         ISIS:   0       BGP:    0


                         RIPng:  0       OSPFv3: 0




Number of advertised imported routes: 


        IPv4 Imported Routes:   0


        IPv6 Imported Routes:   0


                 


Lsp information:


                  LSP Source ID:          No. of used LSPs


                  0000.0000.0022                  002


                                                   


                               Level-2 Statistics


                               ------------------


                                                   


Forwarding routes information:


         Total IPV4 Learnt Routes: 0


                         Critical: 0


                         High    : 0


                         Medium  : 0


                         Low     : 0


         Total IPv4 Forwarding Routes: 1


Total IPv6 Learnt Routes: 0
                        Critical: 0
                        High    : 0
                        Medium  : 0
                        Low     : 0


         Total IPv6 Forwarding Routes: 1


                 


Imported routes information:


         IPv4 Imported Routes:


                         Static: 0       Direct: 0


                         ISIS:   0       BGP:    0


                         RIP:    0       OSPF:   0


         IPv6 Imported Routes:


                         Static: 0       Direct: 0


                         ISIS:   0       BGP:    0


                         RIPng:  0       OSPFv3: 0  




Number of advertised imported routes: 


        IPv4 Imported Routes:   0


        IPv6 Imported Routes:   0


                 


Lsp information:


                  LSP Source ID:          No. of used LSPs


                  0000.0000.0002                  001





Table 7-114  Description of the display isis statistics command output





Item




Description












Total IPV4 Learnt Routes
    

  • Critical
    

    • 

  • High
    

    • 

  • Medium
    

    • 

  • Low
    

    • 







Number of IPv4 routes learned by IS-IS:
    

  • Critical: indicates the number of IPv4 routes with convergence
priority critical. 
    

    • 

  • High: indicates the number of IPv4 routes with convergence
priority high.
    

    • 

  • Medium: indicates the number of IPv4 routes with convergence
priority medium.
    

    • 

  • Low: indicates the number of IPv4 routes with convergence priority
low.
    

    • 












Total IPv4 Forwarding Routes




Number of IPv4 routes counted based on the destination address.
If there are multiple routes to the same destination, these routes
are counted as one route.









Total IPv6 Learnt Routes
    

  • Critical
    

    • 

  • High
    

    • 

  • Medium
    

    • 

  • Low
    

    • 







Number of IPv6 routes learned by IS-IS:
    

  • Critical: indicates the number of IPv6 routes with convergence
priority critical. 
    

    • 

  • High: indicates the number of IPv6 routes with convergence
priority high.
    

    • 

  • Medium: indicates the number of IPv6 routes with convergence
priority medium.
    

    • 

  • Low: indicates the number of IPv6 routes with convergence priority
low.
    

    • 












Total IPv6 Forwarding Routes




Number of IPv6 routes counted based on the destination address.
If there are multiple routes to the same destination, these routes
are counted as one route.









IPv4 Imported Routes




Imported IPv4 routes.









Static




Number of imported static routes.









Direct




Number of imported direct routes.









ISIS




Number of imported IS-IS routes.









BGP




Number of imported BGP routes.









RIP




Number of imported RIP routes.









OSPF




Number of imported OSPF routes.









IPv6 Imported Routes




Imported IPv6 routes.









RIPng




Number of imported RIPng routes.









OSPFv3




Number of imported OSPFv3 routes.









LSP Source ID




System ID of the switch that generates the LSP.









No. of used LSPs




Number of used LSPs.









Number of advertised imported routes




Number of imported external routes that are advertised.













# Display IS-IS packet statistics.


<HUAWEI> display isis statistics packet

                          PDUs information for ISIS(1)
                          ----------------------------
          Sent packets:
          PDU type                   Total(packets)
          L1 IIH                        2516
          L1 LSP                          84
          L1 CSNP                          8
          L1 PSNP                         44
          L2 IIH                        5028
          L2 LSP                          80
          L2 CSNP                          8
          L2 PSNP                         46

          Received packets:
          PDU type                   Total(packets)
          L1 IIH                       12943
          L1 LSP                         216
          L1 CSNP                       3911
          L1 PSNP                         40
          L2 IIH                       14907
          L2 LSP                         206
          L2 CSNP                       3900
          L2 PSNP                         41




Table 7-115  Description of the display isis statistics packet command output





Item




Description












PDU type




Packet type.









Total(packets)




Total number of packets.









L1 IIH




Level-1 Hello packets.









L1 LSP




Level-1 LSPs.









L1 CSNP




Level-1 CSNPs.









L1 PSNP




Level-1 PSNPs.









L2 IIH




Level-2 Hello packets.









L2 LSP




Level-2 LSPs.









L2 CSNP




Level-2 CSNPs.









L2 PSNP




Level-2 PSNPs.




















display isis traffic-eng advertisements




Function


The display isis traffic-eng advertisements command displays latest advertised traffic engineering (TE) information.





Format


display isis traffic-eng advertisements [ { level-1 | level-2 | level-1-2 } | { lsp-id | local } ] * [ process-id | vpn-instance vpn-instance-name ]


display isis process-id traffic-eng advertisements [ { level-1 | level-2 | level-1-2 } | { lsp-id | local } ] * 





Parameters





Parameter
Description
Value




level-1
Displays TE information in a Level-1 LSDB.
-





level-2
Displays TE information in a Level-2 LSDB.
-





level-1-2
Displays TE information in a Level-1 or Level-2 LSDB
based on the local node type. That is, if the local node is a Level-1
or Level-2 node, TE information in a Level-1 or Level-2 LSDB is displayed.
If the local node is a Level-1-2 node, TE information in Level-1 and
Level-2 LSDBs is displayed.
-





lsp-id
Displays TE information in the specified LSP.
The value is in dotted decimal notation. The value
ranges from 16 to 20 in ####.####.####.##-## format, such as 0050.0500.5004.00-00.





local
Displays locally advertised TE information.
-





process-id
Specifies an IS-IS process ID.
The value is an integer that ranges from 1 to 65535. 





vpn-instance vpn-instance-name
Specifies the IS-IS multi-instance process in a specified
VPN instance.
The value must be an existing
VPN instance name.









Views


All views





Default Level


1: Monitoring level





Usage Guidelines


You can run the display isis traffic-eng advertisements command to check latest advertised TE information.





Example


# Display advertised TE information.


<HUAWEI> display isis traffic-eng advertisements


                           TE information for ISIS(1)


                           --------------------------


Level-1 Link State Database


---------------------------


LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL


0000.0000.0001.00-00* 0x00000001   0x3f57        534           0/0/0


 NLPID      : IPV4


 AREA ADDR  : 00.0005



Level-2 Link State Database


---------------------------


LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL


0000.0000.0001.00-00* 0x0000001c   0xf1ec        687           0/0/0


 NLPID      : IPV4


 AREA ADDR  : 00.0005


 Router ID  : 10.1.1.9


+NBR        : 0000.0000.0002.02  COST: 10


    Affinity: 0x00000000


    Interface IP Address:  10.1.1.1


    Physical BW  :      12500 Bytes/sec


    Reservable BW:       6250 Bytes/sec


    Unreserved BW:


    BW Unresrv[0] :       6250 Bytes/sec BW Unresrv[1] :       6250 Bytes/sec


    BW Unresrv[2] :       6250 Bytes/sec BW Unresrv[3] :       6250 Bytes/sec


    BW Unresrv[4] :       6250 Bytes/sec BW Unresrv[5] :       6250 Bytes/sec


    BW Unresrv[6] :       6250 Bytes/sec BW Unresrv[7] :       6250 Bytes/sec


    TE Cost      :         10


    Sub Unreserved BW for Class Type 1:


    BW Unresrv[0] :          0 Bytes/sec BW Unresrv[1] :          0 Bytes/sec


    BW Unresrv[2] :          0 Bytes/sec BW Unresrv[3] :          0 Bytes/sec


    BW Unresrv[4] :          0 Bytes/sec BW Unresrv[5] :          0 Bytes/sec


    BW Unresrv[6] :          0 Bytes/sec BW Unresrv[7] :          0 Bytes/sec


    Bandwidth Constraint Model: Russian Doll


    Bandwidth Constraints:


    BC[0] :       6250 Bytes/sec BC[1] :          0 Bytes/sec


    Local Overbooking Multiplier:


    LOM[0] :        100 %         LOM[1] :        100 %


+NBR        : 0000.0000.0004.00  COST: 10


    Affinity: 0x00000000


    Interface IP Address:  10.3.1.1


    Peer IP Address     :  10.3.1.2


    Physical BW  :      12500 Bytes/sec


    Reservable BW:       6250 Bytes/sec


    Unreserved BW:


    BW Unresrv[0] :       6250 Bytes/sec BW Unresrv[1] :       6250 Bytes/sec


    BW Unresrv[2] :       6250 Bytes/sec BW Unresrv[3] :       6250 Bytes/sec


    BW Unresrv[4] :       6250 Bytes/sec BW Unresrv[5] :       6250 Bytes/sec


    BW Unresrv[6] :       6250 Bytes/sec BW Unresrv[7] :       6250 Bytes/sec


    TE Cost      :         10


    Sub Unreserved BW for Class Type 1:


    BW Unresrv[0] :          0 Bytes/sec BW Unresrv[1] :          0 Bytes/sec


    BW Unresrv[2] :          0 Bytes/sec BW Unresrv[3] :          0 Bytes/sec


    BW Unresrv[4] :          0 Bytes/sec BW Unresrv[5] :          0 Bytes/sec


    BW Unresrv[6] :          0 Bytes/sec BW Unresrv[7] :          0 Bytes/sec


    Bandwidth Constraint Model: Russian Doll


    Bandwidth Constraints:


    BC[0] :       6250 Bytes/sec BC[1] :          0 Bytes/sec


    Local Overbooking Multiplier:


    LOM[0] :        100 %         LOM[1] :        100 %


+SRLG NBR ID: 0000.0000.0004.00
    Interface IP Address: 10.3.1.1 
    Neighbor IP Address : 10.3.1.2 
    Shared Risk Link Group: 10,20



Table 7-116  Description of the display isis traffic-eng advertisements
command output






Item




Description












LSPID




LSP ID.









LSP Seq Num




LSP sequence number.









LSP Checksum




LSP checksum.









LSP Holdtime




LSP holdtime.









ATT/P/OL




    

  • ATT: Attach bit
    • 

  • P: partition bit
    • 

  • OL: overload bit
    • 










NLPID




Network protocol.









AREA ADDR




Area address.









Router ID




Router ID of the switch.









+NBR




System ID of the neighbor with the cost style wide, wide-compatible,
or compatible.









COST




Cost.









Affinity:




Affinity attribute of a link.









Interface IP Address




IP address of an interface.









Peer IP Address




Peer IP address of an interface.









Physical BW




Physical bandwidth of a link.









Reservable BW




Reservable bandwidth of a link.









Unreserved BW




Unreserved bandwidth.









Sub Unreserved BW for Class Type 1




Unreserved bandwidth for CT1.









BW Unresrv [ x ]




Unreserved bandwidth for the link with priority x.









TE Cost




TE cost of a link.









Bandwidth Constraint Model




Bandwidth constraint model used by a link.









Bandwidth Constraints




Bandwidth constraint.









BC[x]




Bandwidth constraint of BCx.









Local Overbooking Multiplier




Local overbooking multiplier.









LOM[x]




Local overbooking multiplier of BCx.









+SRLG NBR ID




System ID of a neighbor in a shared risk link group (SRLG).









Neighbor IP Address




IP address of the neighbor.









Shared Risk Link Group




Shared risk link group. 


 NOTE: 
When SRLG
is enabled on an interface, TE information contains SRLG information.




















Related Topics








display isis traffic-eng network




Function


The display isis traffic-eng network command displays IS-IS TE network information.





Format


display isis traffic-eng network [ level-1 | level-2 | level-1-2 ] [ process-id | vpn-instance vpn-instance-name ]


display isis process-id traffic-eng network [ level-1 | level-2 | level-1-2 ]





Parameters





Parameter
Description
Value




level-1
Displays TE network information on a Level-1 router.
-





level-2
Displays TE network information on a Level-2 router.
-





level-1-2
Displays TE network information on a Level-1-2 router.
-





process-id
Specifies an IS-IS process ID.
The value is an integer that ranges from 1 to 65535. 





vpn-instance vpn-instance-name
Specifies the IS-IS multi-instance process in a specified
VPN instance.
The value must be an existing
VPN instance name.









Views


All views





Default Level


1: Monitoring level





Usage Guidelines


This command does not take effect on P2P networks.


If the IS level is not specified, Level-1-2 TE network information
is displayed.





Example


# Display IS-IS TE network information.


<HUAWEI> display isis traffic-eng network


                           TE information for ISIS(1)


                           --------------------------


Level-2 Network Information


---------------------------


    DIS Router ID   : 10.1.1.9     DIS''s Ip Address          : 10.1.1.1


    Status In CSPF : ACTIVE      Attached Router Count    : 2


    List of Attached Routers


 RouterId : 10.1.1.9   Nbr : 0000.0000.0001.00  Link State : 1


 RouterId : 10.2.2.9   Nbr : 0000.0000.0002.00  Link State : 1


    DIS Router ID   : 10.4.4.9     DIS''s Ip Address          : 10.1.1.2


    Status In CSPF : ACTIVE      Attached Router Count    : 2


    List of Attached Routers


 RouterId : 10.4.4.9   Nbr : 0000.0000.0004.00  Link State : 1


 RouterId : 10.3.3.9   Nbr : 0000.0000.0003.00  Link State : 1


 Total Number of TE Networks in Level-2 Area: 2, Num Active: 2



Table 7-119  Description of the display isis traffic-eng network command
output





Item




Description












DIS Router ID




Router ID of the DIS.









DIS's Ip Address




IP address of the DIS.









Status In CSPF




Whether CSPF is enabled on the switch.









Attached Router Count




Number of connected switchs, including the local switch.









List of Attached Routers




List of connected switchs.









RouterId




Router ID of the local switch.









Nbr




IP address of the neighbor.









Link State




Link status.









Total Number of TE Networks in Level-2 Area




Total number of networks on which TE is enabled in a Level-2
area.


















Related Topics







display isis traffic-eng statistics




Function


The display isis traffic-eng statistics command displays IS-IS TE statistics.





Format


display isis traffic-eng statistics [ process-id | vpn-instance vpn-instance-name ]


display isis process-id traffic-eng statistics





Parameters





Parameter
Description
Value




process-id
Specifies an IS-IS process ID. If no process ID is specified,
TE statistics about all IS-IS processes are displayed.
The value is an integer that ranges from 1 to 65535.





vpn-instance vpn-instance-name
Specifies the IS-IS multi-instance process in a specified
VPN instance.
The value must be an existing
VPN instance name.









Views


All views





Default Level


1: Monitoring level





Usage Guidelines


You can use this command to view IS-IS TE statistics on
the switch, including
the IS level, cost style, IS-IS TE level, and IS-IS router ID.





Example


# Display IS-IS TE statistics.


<HUAWEI> display isis traffic-eng statistics


                           TE information for ISIS(1)


                           --------------------------


TE Statistics Information


-------------------------


 IS-IS System Type                          : Level-1-2


 IS-IS Cost Style Status                    : Wide


 IS-IS Level-1 Traffic Engineering Status   : Disabled


 IS-IS Level-2 Traffic Engineering Status   : Enabled


 IS-IS Router ID                            : 10.1.1.9



Table 7-120  Description of the display isis traffic-eng statistics command
output





Item




Description












IS-IS System Type




IS level.









IS-IS Cost Style Status




Cost style of the switch.









IS-IS Level-1 Traffic Engineering Status




TE status of a Level-1 router.









IS-IS Level-2 Traffic Engineering Status




TE status of a Level-2 router.









IS-IS Router ID




Router ID of an IS-IS router.


















Related Topics







display isis traffic-eng sub-tlvs




Function


The display isis traffic-eng sub-tlvs command displays the types of sub-TLVs carrying DS-TE parameters.





Format


display isis traffic-eng sub-tlvs [ process-id | vpn-instance vpn-instance-name ]


display isis process-id traffic-eng sub-tlvs





Parameters





Parameter
Description
Value




process-id
Specifies an IS-IS process ID. 
The value is an integer that ranges from 1 to 65535. 





vpn-instance vpn-instance-name
Specifies the IS-IS multi-instance process in a specified
VPN instance.
The value must be an existing
VPN instance name.









Views


All views





Default Level


1: Monitoring level





Usage Guidelines


You can run the display isis traffic-eng sub-tlvs command to check the types of sub-TLVs carrying DS-TE parameters.





Example


# Display the types of sub-TLVs carrying DS-TE parameters.


<HUAWEI> display isis traffic-eng sub-tlvs



IS-IS(1) SubTlv Information


---------------------------------


 Unreserved sub-pool bandwidth sub-tlv value : 251


 Bandwidth constraint sub-tlv value          : 252


 LO multiplier sub-tlv value                 : 253



Table 7-121  Description of the display isis traffic-eng sub-tlvs command
output





Item




Description












IS-IS(1) SubTlv Information




Sub-TLV information about IS-IS process 1.









Unreserved sub-pool bandwidth sub-tlv value




Sub-TLV of the unreserved sub-pool bandwidth.









Bandwidth constraint sub-tlv value




Sub-TLV of the bandwidth constraint.









LO multiplier sub-tlv value




Sub-TLV of the local overbooking multiplier.


















Related Topics







display snmp-agent trap feature-name isis all




Function


The display snmp-agent trap feature-name isis
all command displays the status of the trap function on
the IS-IS module.





Format


display snmp-agent trap feature-name isis all





Parameters


None





Views


All views





Default Level


1: Monitoring level





Usage Guidelines


If the trap function has been enabled, the status is displayed
as on. Otherwise, the status is displayed as off.


To change the status of the trap function, run the snmp-agent trap enable feature-name isis command to enable the trap function or run the undo
snmp-agent trap enable feature-name isis command
to disable the trap function.





Example


# Display the status of the trap function on the IS-IS
module.


<HUAWEI> display snmp-agent trap feature-name isis all
------------------------------------------------------------------------------
Feature name: ISIS
Trap number : 17
------------------------------------------------------------------------------
Trap name                       Default switch status      Current switch status
isisDatabaseOverload            off                        off
isisManualAddressDrops          off                        off
isisCorruptedLSPDetected        off                        off
isisAttemptToExceedMaxSequence  off                        off
isisIDLenMismatch               off                        off
isisMaxAreaAddressesMismatch    off                        off
isisOwnLSPPurge                 off                        off
isisSequenceNumberSkip          off                        off
isisAuthenticationTypeFailure   off                        off
isisAuthenticationFailure       off                        off
isisVersionSkew                 off                        off
isisAreaMismatch                off                        off
isisRejectedAdjacency           off                        off
isisLSPTooLargeToPropagate      off                        off
isisOrigLSPBuffSizeMismatch     off                        off
isisProtocolsSupportedMismatch  off                        off
isisAdjacencyChange             off                        off




Table 7-122  Description of the display snmp-agent trap feature-name isis
all command output





Item




Description












Feature name




Name of the module that trap messages belong to.









Trap number




Number of trap messages.









Trap name




Name of the trap message of the IS-IS module:
    

  • isisAdjacencyChange: indicates neighbor changes.
    • 

  • isisAreaMismatch: indicates that the area address of the received
Level-1 Hello packet does not match the local area address.
    • 

  • isisAttemptToExceedMaxSequence: indicates that the LSP sequence
number is close to the maximum value.
    • 

  • isisAuthenticationFailure: indicates that the authentication code
in the received packet does not match the local authentication code. 
    • 

  • isisAuthenticationTypeFailure: indicates that the authentication
type in the received packet does not match the local authentication
type. 
    • 

  • isisCorruptedLSPDetected: indicates the LSP checksum error.
    • 

  • isisDatabaseOverload: indicates that the LSDB overload bit changes.
    • 

  • isisIDLenMismatch: indicates that the system ID length in the
received packet does not match the local system ID length.
    • 

  • isisLSPTooLargeToPropagate: indicates that the length of the forwarded
LSP is greater than the interface MTU. 
    • 

  • isisManualAddressDrops: indicates that some area IDs will be dropped
if the number of Level-2 area IDs exceeds 3 on the Level-1-2 router
after the router advertises LSPs with Level-1 area IDs to a Level-2
area. 
    • 

  • isisMaxAreaAddressesMismatch: indicates that the maximum area
address in the received packet does not match the local area address.
    • 

  • isisOrigLSPBuffSizeMismatch: indicates that the received LSP size
does not match the local buffer size. 
    • 

  • isisOwnLSPPurge: indicates that an IS detects that its LSPs are
purged on the network. 
    • 

  • isisProtocolsSupportedMismatch: indicates that the protocol in
the received packet is not supported by the local device.
    • 

  • isisRejectedAdjacency: indicates that the PDU is received from
the neighbor but the neighbor relationship cannot be established. 
    • 

  • isisSequenceNumberSkip: indicates that the local router receives
the LSP sent by itself with the sequence number greater than that
of the LSP in the local LSDB. 
    • 

  • isisVersionSkew: indicates that the version of the Hello packet
received by IS-IS is incorrect. 
    • 












Default switch status 




Default status of the trap function:
    

  • on: The trap function is enabled. 
    • 

  • off: The trap function is disabled. 
    • 












Current switch status




Current status of the trap function:
    

  • on: The trap function is enabled. 
    • 

  • off: The trap function is disabled. 
    • 























domain-authentication-mode




Function


The domain-authentication-mode command
configures an IS-IS routing domain to authenticate received Level-2
packets using the specified authentication mode and password and adds
authentication information to Level-2 packets to be sent.


The undo domain-authentication-mode command cancels authenticating
Level-2 packets and deletes the added authentication information from
Level-2 packets.


By default, the system neither encapsulates
generated Level-2 packets with authentication information nor authenticates
received Level-2 packets.





Format


domain-authentication-mode { simple { plain plain-text | [ cipher ] plain-cipher-text } | md5 {
[ cipher ] plain-cipher-text | plain plain-text } } [ ip | osi ] [ snp-packet { authentication-avoid | send-only } | all-send-only ]


domain-authentication-mode keychain keychain-name [ snp-packet { authentication-avoid | send-only } | all-send-only ] 


domain-authentication-mode hmac-sha256 key-id key-id { plain plain-text | [ cipher ] plain-cipher-text } [ snp-packet { authentication-avoid | send-only } | all-send-only ]


undo domain-authentication-mode





Parameters





Parameter
Description
Value




simple
Transmits the password in plain text.
 NOTICE: 
Simple authentication has potential risks. HMAC-SHA256
cipher text authentication is recommended.




-





plain plain-text
Specifies the authentication password in plain text.
You can enter only the password in plain text. When you view the configuration
file, the password is displayed in plain text.
 NOTICE: 
If plain is selected, the password
is saved in the configuration file in plain text. This brings security
risks. It is recommended that you select cipher to save the password in cipher text.




The value is a string of case-sensitive characters
without spaces. The value contains digits and letters. When the authentication
mode is simple, the value is a string of
1 to 16 characters. When the authentication mode is md5 or hmac-sha256, the value is a string of 1 to 255 characters.





cipher plain-cipher-text

Specifies the authentication password in cipher text.
You can enter the password in plain or cipher text. When you view
the configuration file, the password is displayed in cipher text.
By default, the password is in cipher text.


The value is a string of case-sensitive characters
without spaces. The value contains digits and letters. When the authentication
mode is simple, the value is a string of
1 to 16 characters in plain text or a string of 32 or 48 characters in cipher text. When the authentication
mode is md5 or hmac-sha256, 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
Transmits the password that is encrypted using MD5.
 NOTICE: 
MD5 authentication has potential risks. HMAC-SHA256
cipher text authentication is recommended.




-





keychain keychain-name
Specifies the keychain that changes with time.
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.






ip
Indicates the IP authentication password. When neither ip nor osi is specified,
the default parameter osi is used.
-





osi
Indicates the OSI authentication password. When neither ip nor osi is specified,
the default parameter osi is used.
-





snp-packet
Authenticates SNPs.
-





authentication-avoid
Encapsulates generated LSPs but not SNPs with authentication
information and authenticates received LSPs but not SNPs.
-





send-only
Encapsulates generated LSPs and SNPs with authentication
information, and authenticates received LSPs but not SNPs.
-





all-send-only
Encapsulates generated LSPs and SNPs with authentication
information, but does not authenticate received LSPs and SNPs.
-





hmac-sha256
Encapsulates generated packets with the HMAC-SHA256
authentication and a password encrypted by the HMAC-SHA256 algorithm
and authenticates received packets.
-





key-id key-id
Indicates key ID of the HMAC-SHA256 algorithm.
It is an integer ranging from 0 to 65535.











Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
Generally, the IS-IS packets to be
sent are not encapsulated with authentication information, and the
received packets are not authenticated. If a user sends malicious
packets to attack a network, information on the entire network may
be stolen. Therefore, you can configure IS-IS authentication to improve
the network security.  


The domain authentication password is
encapsulated into Level-2 IS-IS packets. Only the packets that pass
the domain authentication can be accepted. Therefore, you can configure
IS-IS domain authentication to authenticate Level-2 area.  

Precautions
This command is valid in all the topologies in
the specified IS-IS process and is only valid for Level-2 or Level-1-2
routers.


By using this command, you can discard all the Level-2
packets whose domain authentication password does not contain the
one set through this command. At the same time, IS-IS adds the configured
domain authentication password in all the Level-2 packets carrying
routing information sent from the local node. 


The authentication
takes effect on the interface with the password. The port without
the password can still receive the LSP and SNP with password. 





Example


# Set the domain authentication mode to HMAC-SHA256,
authentication password to admin@huawei ,and key id to 33 to authenticate Level-2 packets.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] domain-authentication-mode hmac-sha256 key-id 33 cipher admin@huawei 









filter-policy export (IS-IS)




Function


The filter-policy export command configures
a filtering policy to allow IS-IS to filter the imported routes to
be advertised.


The undo filter-policy export command cancels the filtering function.


By default, IS-IS
does not filter the imported routes to be advertised.





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 route-policy to filter routes
based on tag and other protocol parameters.
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
Specifies the imported routes that need to be filtered
when the routes are advertised. If this parameter is not specified,
all the imported routes to be advertised are filtered.
The value can be direct, static, unr, rip, bgp, ospf, or another isis process.





process-id
Specifies the process ID if protocol is rip, ospf, or another isis process.
The value is an integer that ranges from 1 to 65535.









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


When IS-IS and other routing
protocols are running on the network, and a boundary router in the
IS-IS routing domain has imported routes of other routing protocols,
the boundary router will advertise all the imported routes to its
IS-IS neighbors by default. To advertise some of the imported routes
to neighbors, use the filter-policy export command.


Precautions 


Running the filter-policy export command does not affect the routes on the local device, but only
advertises specific imported routes to IS-IS neighbors. 


For an ACL, when the rule command is used to configure a filtering rule, the filtering rule
is effective only with the source address range that is specified
by the source parameter and with the time
period that 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 of the specified routing domain
that are imported by IS-IS are advertised to the specified neighbor.


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 of the specified
routing domain that are imported by IS-IS are advertised to the specified
neighbor.





Example


# Configure IS-IS to filter the imported routes using
ACL 2000 before advertising the routes to other switchs.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] filter-policy 2000 export









filter-policy import (IS-IS)




Function


The filter-policy import command configures
a filtering policy to allow IS-IS to filter the received routes to
be added to the IP routing table.


The undo filter-policy
import command cancels the filtering function.


By
default, IS-IS does not filter the received routes to be added to
the IP routing table.





Format


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


undo filter-policy [ 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 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 route-policy to filter routes
based on tag and other protocol parameters.
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


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


IS-IS routing entries need
to be added to an IP routing table to guide IP packet forwarding.
If an IS-IS routing table has routes destined for a specific network
segment, but these routes are not expected to be added to an IP routing
table, run the filter-policy import command with
specified parameters to allow only the needed IS-IS routes to be added
to the IP routing table. 


Precautions 


Running
the filter-policy import command on a router does
not affect LSP flooding and LSDB synchronization on the router, but
affects the local IP routing table. 


For an ACL,
when the rule command is used to configure a filtering
rule, the filtering rule is effective only with the source address
range that is specified by the source parameter
and with the time period that 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 IS-IS 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 IS-IS
are delivered to the IP routing table.





Example


# Configure IS-IS to filter the received
routes using ACL 2000 and add the routes matching the filtering conditions
to the IP routing table.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] filter-policy 2000 import









flash-flood




Function


The flash-flood command enables LSP
fast flooding to speed up IS-IS network convergence.


The undo flash-flood command disables LSP fast flooding.


By default, LSP fast flooding is disabled.





Format


flash-flood [ lsp-count | max-timer-interval interval | [ level-1 | level-2 ] ] *


undo flash-flood [ lsp-count | max-timer-interval interval | [ level-1 | level-2 ] ] *





Parameters





Parameter
Description
Value




lsp-count
Specifies the maximum number of LSPs to be flooded at
a time on an interface.
The value is an integer that ranges from 1 to 15. The
default value is 5.





max-timer-interval interval
Specifies the maximum interval for LSP flooding.
The value is an integer that ranges from 10 to 50000,
in milliseconds. The default value is 10 ms.





level-1
Enables LSP fast flooding in Level-1. If no level is
specified, by default, LSP fast flooding is enabled in both Level-1
and Level-2.
-





level-2
Enables LSP fast flooding in Level-2. If no level is
specified, by default, LSP fast flooding is enabled in both Level-1
and Level-2.
-









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario  
In most cases, when an IS-IS router
receives new LSPs from other routers, it updates the LSPs in its LSDB
and periodically floods the updated LSPs according to a timer. 


LSP fast flooding speeds up LSDB synchronization because it allows
a device to flood fewer LSPs than the specified number before route
calculation when the device receives one or more new LSPs. This mechanism
also speeds up network convergence. 

Precautions 
You
can specify the number of LSPs to be flooded each time. The number
is valid for all IS-IS interfaces. If the number of LSPs to be flooded
is greater than the specified value, the lsp-count number of the LSPs are sent. If the timer is configured and does
not time out before route calculation, LSPs are flooded immediately;
otherwise, LSPs are flooded when the timer times out. 





Example


# Enable LSP fast flooding, configure each interface
to send a maximum of six LSPs at a time, and set the maximum interval
for sending LSPs to 100 ms.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] flash-flood 6 max-timer-interval 100









frr (IS-IS)


Function


The frr command enables the IS-IS Auto FRR function and displays the IS-IS Auto FRR view.


The undo frr command disables the IS-IS Auto FRR function.


By default, the IS-IS Auto FRR function is disabled.




Format


frr


undo frr




Parameters


None




Views


IS-IS view




Default Level


2: Configuration level




Usage Guidelines


Usage scenario
With the development of networks, the Voice over IP (VoIP) and on-line video services require high-quality real-time transmission. Nevertheless, if an IS-IS fault occurs, multiple processes, including fault detection, LSP update, LSP flooding, route calculation, and FIB entry delivery, must be performed to switch traffic to a new link. This results in a lengthy traffic interruption, which cannot meet the requirement for real-time services.


IS-IS Auto FRR can fast switch traffic to a backup link, ensuring millisecond-level traffic interruption. This protects traffic and improves IS-IS network reliability.

Precautions
After running this command, run the loop-free-alternate command to calculate a loop-free backup route.




Example


# Enter the IS-IS FRR view.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] frr


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








frr-policy route




Function


The frr-policy route command configures
a filtering policy to allow IS-IS to filter the IS-IS backup routes
to be added in the IP routing table.


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


By default,
IS-IS does not filter the IS-IS backup routes to be added in the IP
routing table.





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 a route-policy to filter IS-IS
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


IS-IS FRR view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
The filtering policy can be configured
as required. In this case, the IS-IS backup route that satisfies specified
rules can be added to the IP routing table and delivered to the forwarding
table. When a fault occurs on the route, the system can fast switch
the forwarded traffic to the IS-IS backup route to protect traffic. 


You can use IP prefix lists or ACLs to filter IS-IS backup routes. 

Precautions
If you run the frr-policy route command multiple times, 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, IS-IS adds all backup routes to the IP routing
table.





Example


# Configure IS-IS to filter IS-IS backup
routes using route-policy and add the routes matching the route-policy abc to the IP routing table.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] frr


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







Related Topics







graceful-restart (IS-IS)




Function


The graceful-restart command enables
the graceful restart (GR) function for an IS-IS process.


The undo graceful-restart command disables the GR function
for an IS-IS process.


By default, the GR function is disabled
for an IS-IS process.





Format


graceful-restart


undo
graceful-restart





Parameters


None





Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


This command is valid for
all topologies in an IS-IS process.


When an IS-IS process on
a device is restarted, neighbors delete neighbor relationships with
the device and delete LSPs from the device. As a result, routes of
neighbors are calculated incorrectly and packets are lost. Consequently,
the network is temporarily interrupted.


To solve this problem,
you can enable GR of the IS-IS process by running the graceful-restart command.


After the graceful-restart command
is run, the device can notify its restart status to neighbors and
permit neighbors to maintain neighbor relationships. In this manner,
nonstop packet forwarding is implemented.


Configuration Impact


If IS-IS GR is enabled
on a router, the holdtimes of this router's neighbors are automatically
changed to 60s if they are smaller than 60s, and the holdtimes of
this router's neighbors are kept unchanged if they are equal to or
greater than 60s. If a router is faulty in non-GR scenarios, its neighbors
need to take 60 seconds to detect the fault. A large number of packets
may be discarded within the 60 seconds.


To resolve this problem, run the graceful-restart
no-impact-holdtime command to configure the holdtimes
of the neighbors to remain unchanged after IS-IS GR is enabled. 





Example


# Enable the GR function for IS-IS process 1.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] graceful-restart









graceful-restart no-impact-holdtime




Function


The graceful-restart no-impact-holdtime command configures the holdtime of an IS-IS neighbor to remain unchanged
after IS-IS GR is enabled.


The undo graceful-restart
no-impact-holdtime command cancels the configuration.


By default, after IS-IS GR is enabled, the holdtime
of an IS-IS neighbor is automatically changed to 60s if it is smaller
than 60s, and the holdtime of an IS-IS neighbor is kept unchanged
if it is equal to or greater than 60s.





Format


graceful-restart no-impact-holdtime


undo graceful-restart no-impact-holdtime





Parameters


None





Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


If IS-IS GR is enabled
on a router, the holdtimes of this router's neighbors are automatically
changed to 60s if they are smaller than 60s, and the holdtimes of
this router's neighbors are kept unchanged if they are equal to or
greater than 60s. If a router is faulty in non-GR scenarios, its neighbors
need to take 60 seconds to detect the fault. A large number of packets
may be discarded within the 60 seconds.


To resolve this problem,
run the graceful-restart no-impact-holdtime command
to configure the holdtimes of the neighbors to remain unchanged after
IS-IS GR is enabled. After you run this command, the router can still
fast detect neighbor status, implementing rapid network convergence.


Prerequisites


You have run the graceful-restart (IS-IS) command in the IS-IS view.





Example


# Configure the holdtime of an IS-IS neighbor to remain
unchanged after IS-IS GR is enabled.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] graceful-restart


[HUAWEI-isis-1] graceful-restart no-impact-holdtime









graceful-restart interval




Function


The graceful-restart interval command
sets  the GR T3 timer.


The undo graceful-restart interval command  restores the default T3 timer.


By default, the GR
T3 timer is 300 seconds.





Format


graceful-restart interval interval-value


undo graceful-restart interval





Parameters





Parameter
Description
Value




interval-value
Specifies the GR T3 timer.
The value is an integer that ranges from 30 to 1800,
in seconds. 
Setting a value greater than that of the GR T2 timer
specified using the graceful-restart
t2-interval command is recommended. If the value
is smaller than that of the GR T2 timer, the GR may fail.











Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


IS-IS GR can be classified
into restarting GR and starting GR based on the restart type. The
restarting GR is triggered by a master/slave main control board switchover
or an IS-IS process restart, while the starting GR is triggered by
a restart of the IS-IS-enabled router.


During a restarting GR,
the restarter restarts the protocol and starts the T1, T2, and T3
timers at the same time. The value of the T1 timer indicates the longest
time during which the GR restarter waits for the LSP from the GR helper.
The value of the T2 timer indicates the longest time during which
the system waits for the LSDB synchronization. The value of the T3
timer indicates the longest time that a GR lasts. A router disables
the T3 timer after the LSDB synchronization ends in all areas. If
LSDBs are not synchronized yet when the T3 timer expires, the GR fails.


You can run the graceful-restart interval command
to adjust the value of the T3 timer so that the LSDB synchronization
can end before the T3 timer expires, which prevents the GR failure.


Prerequisites


The GR of the IS-IS process has been
enabled using the graceful-restart command.


Configuration
Impact


If the graceful-restart interval command is run on an IS-IS-enabled router, interval-value is used as the holdtime of its neighbor during the GR.


Precautions


The graceful-restart interval command is applicable only to restarting GRs.





Example


# Set the GR interval for IS-IS process 1 to 120 seconds
(2 minutes).


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] graceful-restart


[HUAWEI-isis-1] graceful-restart interval 120









graceful-restart suppress-sa




Function


The graceful-restart suppress-sa command suppresses the suppress-advertisement (SA) bit of the restart TLV.


The undo graceful-restart suppress-sa command restores the default setting.


By default, the SA bit of the restart TLV is not suppressed.





Format


graceful-restart suppress-sa


undo graceful-restart suppress-sa





Parameters


None





Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
The switch that starts for the first time (not including GR) does
not maintain the forwarding status. If the switch does not start for the
first time, the LSPs generated when the switch run last time may exist
in the LSP database of other switchs in the network. 


The sequence number of the LSP
fragment is reinitialized when the switch starts, so the LSPs stored
in the LSP database of other switchs seem to be newer than the LSPs generated after the switch starts. This leads to
the black hole in the network, and the black hole lasts until the switch regenerates its LSPs
and advertises the LSPs with the highest sequence number. 


If
the neighbor suppresses the advertisement of the adjacency relationship
to this switch during
the switch starting
until the switch advertises
the updated LSPs, the preceding case can be avoided. 

Prerequisites
GR has been enabled for the IS-IS process using the graceful-restart command. 





Example


# Suppress the SA bit in the restart TLV of IS-IS process 1.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] graceful-restart


[HUAWEI-isis-1] graceful-restart suppress-sa









graceful-restart t2-interval




Function


The graceful-restart t2-interval command
configures a value for the T2 timer during an IS-IS GR.


The undo graceful-restart t2-interval command restores the
default value of the T2 timer.


By default, the GR T2 timer is
60 seconds.





Format


graceful-restart t2-interval interval-value


undo graceful-restart t2-interval





Parameters





Parameter
Description
Value




interval-value

Specifies the value of the T2 timer during the IS-IS
GR.


The value is an integer that ranges from 30 to 1800,
in seconds.
Setting a value smaller than that of the GR T3 timer
specified using the graceful-restart interval command is recommended.











Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


IS-IS GR can be classified
into restarting GR and starting GR based on the restart type. The
restarting GR is triggered by a master/slave main control board switchover
or an IS-IS process restart, while the starting GR is triggered by
a restart of the IS-IS-enabled router.


A GR restarter starts
the T1 and T2 timers during all GRs. The value of the T1 timer indicates
the longest time during which the GR restarter waits for the LSP from
the GR helper. The value of the T2 timer indicates the longest time
during which the system waits for the LSDB synchronization. The T2
timer is disabled after the LSDB synchronization among Level-1 or
Level-2 routers ends. If LSDBs are not synchronized yet when the T2
timer expires, the GR fails.


You can run the graceful-restart
t2-interval command to adjust the value of the T2 timer
so that the LSDB synchronization can end before the T2 timer expires,
which prevents the GR failure.


Prerequisites


The
GR of the IS-IS process has been enabled using the graceful-restart command.


Precautions


If the value of the
T2 timer is too small, a GR may fail. Keeping the default value is
recommended. If you want to adjust it, configure a value to meet the
conditions on the live network.





Example


# Set the GR T2 timer of IS-IS process 1 to 120 seconds
(2 minutes).


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] graceful-restart


[HUAWEI-isis-1] graceful-restart t2-interval 120









import-route (IS-IS)




Function


The import-route command configures
IS-IS to import routes from other routing protocols.


The undo import-route command restores the default setting.


By default, IS-IS does not import routes from other routing protocols.





Format


import-route { { rip | isis | ospf } [ process-id ] | static | direct | unr | bgp [ permit-ibgp ] } [ cost-type { external | internal } | cost cost | tag tag | route-policy route-policy-name | [ level-1 | level-2 | level-1-2 ] ] *


import-route { { rip | isis | ospf } [ process-id ] | direct | unr | bgp [ permit-ibgp ] } inherit-cost [ tag tag | route-policy route-policy-name |
[ level-1 | level-2 | level-1-2 ] ] *


import-route limit limit-number [ threshold-alarm upper-limit upper-limit-value lower-limit lower-limit-value ] { level-1 | level-2 | level-1-2 }


undo import-route { { rip | isis | ospf } [ process-id ] | static | direct | unr | bgp [ permit-ibgp ] } [ cost-type { external | internal } | cost cost | tag tag | route-policy route-policy-name | [ level-1 | level-2 | level-1-2 ] ] *


undo import-route { { rip | isis | ospf } [ process-id ] | direct | unr | bgp [ permit-ibgp ] } inherit-cost [ tag tag | route-policy route-policy-name |
[ level-1 | level-2 | level-1-2 ] ] *


undo import-route limit [ limit-number ] [ threshold-alarm upper-limit upper-limit-value lower-limit lower-limit-value ] { level-1 | level-2 | level-1-2 }





Parameters





Parameter
Description
Value




rip
Indicates that the routing protocol from which routes
are imported is RIP.
-





isis
Indicates that the routing protocol from which routes
are imported is IS-IS.
-





ospf
Indicates that the routing protocol from which routes
are imported is OSPF.
-





process-id
Specifies a process ID. When protocol is rip, ospf, or isis, a process ID needs to be specified.
The default process ID is 1.
The value is an integer that ranges from 1 to 65535.





static
Indicates that the imported routes are active static
routes.
-





direct
Indicates that the imported routes are direct routes.
-





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.


-






bgp
Indicates that the routing protocol from which routes
are imported is BGP.
-





permit-ibgp

Specifies the imported source route as an IBGP route.
If you do not configure this parameter, only the EBGP routes are imported.


-






cost-type { external | internal }

Indicates the cost type of the imported routes. By
default, the cost type is external. The
configuration of this parameter will affect the costs of imported
routes.
    

  • If the cost type of an imported route is configured as external, the cost of the imported route equals the
cost of the original route plus 64.
    • 

  • If the cost type of an imported route is configured as internal, the imported route inherits the cost of the
original route.
    • 





 NOTE: 
If the cost style of the switch is wide, compatible,
or wide-compatible, the cost types of imported routes are not differentiated
between external and internal.




-





cost cost
Specifies the cost value of imported routes.
If the cost style of the switch is wide or wide-compatible,
the cost value of imported routes ranges from 0 to 4261412864. Otherwise,
the value ranges from 0 to 63. The default value is 0.





tag tag
Specifies the administrative tag of imported routes.
The value is an integer that ranges from 1 to 4294967295.





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.





level-1
Indicates that routes are imported into Level-1 routing
tables. If no level is specified, routes are imported to Level-2 routing
tables by default.
-





level-2
Indicates that routes are imported into Level-2 routing
tables. If no level is specified, routes are imported to Level-2 routing
tables by default.
-





level-1-2
Indicates that routes are imported into Level-1 and
Level-2 routing tables. If no level is specified, routes are imported
to Level-2 routing tables by default.
-





inherit-cost
Indicates that the original cost value of imported external
routes is retained. When IS-IS is configured to retain the original
cost value of imported routes, the cost style and cost value cannot
be set for the imported routes.
-





limit limit-number
Specifies the maximum number of external routes allowed
to be imported to the IS-IS area.
The value is an integer ranging from 1 to 10000000.





threshold-alarm
Specifies the alarm threshold for imported routes. 
-





upper-limit upper-limit-value
Specifies the upper alarm threshold for imported routes. 
The value is an integer ranging from 1 to 100. The
default value is 80.





lower-limit lower-limit-value
Specifies the lower alarm threshold for imported routes. 
The value is an integer ranging from 1 to 100. The
default value is 70.













Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


When IS-IS and other routing
protocols are deployed on a network, you can enable the traffic within
an IS-IS routing domain to reach a destination outside the IS-IS routing
domain using either of the following methods:
    

  • Configure boundary devices in the IS-IS routing domain to advertise
default routes to the IS-IS routing domain. 
    

    • 

  • Configure boundary devices in the IS-IS routing domain to import
routes from other routing domains into the IS-IS routing domain. 
    

    • 





If there are multiple boundary devices in the IS-IS routing
domain, optimal routes destined for another routing domain need to
be selected. This requires all devices in the IS-IS routing domain
learn all or some external routes. Configure boundary devices in the
IS-IS routing domain to import routes from other routing domains into
the IS-IS routing domain. Alternatively, run the route-policy route-policy-name command to import some external
routes from other routing domains. 


Precautions 


When the routes of the other protocols are imported, you can set
the cost value and cost style for the imported route. You can also
configure IS-IS to retain the original cost value of the imported
external route. During route advertisement and route calculation,
the original cost values of these routes are used. In this case, the
cost style and cost value of the imported routes cannot be set, and
static routes cannot be imported. 


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 ISIS 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 routes of the specified routing domain are
imported to the IS-IS routing table.





Example


# Configure IS-IS to import static routes
and set the cost value of the routes to 15.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] import-route static cost 15


# Configure IS-IS to import OSPF routes and retain the
original cost value of the routes.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] import-route ospf inherit-cost









import-route isis level-1 into level-2




Function


The import-route isis level-1 into level-2 command configures route leaking from Level-1 areas to Level-2 areas.


The undo import-route isis level-1 into level-2 command prohibits route leaking from Level-1 areas to Level-2 areas.


By default, all Level-1 routing information, excluding information
about default routes, is leaked to Level-2 areas.





Format


import-route isis level-1
into level-2 [ filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag | direct allow-filter-policy ] *


undo import-route isis level-1 into level-2 [ filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name }
| tag tag | direct allow-filter-policy ] *





Parameters





Parameter
Description
Value




filter-policy
Specifies a filtering policy.
-





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. Only the routes
that match the IP prefix can be leaked to Level-2 areas.
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.





tag tag
Specifies the administrative tag value of imported routes.
The value is an integer that ranges from 1 to 4294967295.





direct allow-filter-policy

Specifies the filtering policy to filter the direct
routes. Only the IS-IS Level-1 area direct routing information that
matches the filtering policy can be shared with the Level-2 area with
this parameter, and all Level-1 area direct routing information will
be shared with the Level-2 area without this parameter.


-









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


IS-IS is designed for a hierarchical
network. This means that routes of Level-1 areas are leaked to Level-2
areas, whereas routes of Level-2 areas are not leaked to Level-1 areas. 


The import-route isis level-1 into level-2 command can be run
only on Level-1-2 routers to allow some or no Level-1 routes to be
leaked to Level-2 areas. For example, there are two Level-1-2 routers
in a Level-1 area. You can run the import-route isis level-1 into
level-2 command on one Level-1-2 router to allow some Level-1 routes
to be leaked to the Level-2 area, and run the import-route isis level-1
into level-2 command on the other Level-1-2 router to allow the remaining
Level-1 routes to be leaked to the Level-2 area. Then, traffic that
is sent from the Level-2 area and destined for different network segments
in Level-1 area will be forwarded to different Level-1-2 routers.
This allows route selection to be controlled. 


Precautions


For an ACL, when the rule command
is used to configure a filtering rule, the filtering rule is effective
only with the source address range that is specified by the source parameter and with the time period that 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 in the Level-1 area leak
to the Level-2 area.


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 in the Level-1 area
leak to the Level-2 area.





Example


# Control route leaking from Level-1 areas to Level-2
areas on Level-1-2 routers using filtering policy 2000.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] import-route isis level-1 into level-2 filter-policy 2000









import-route isis level-2 into level-1




Function


The import-route isis level-2 into level-1 command configures route leaking from Level-2 areas to Level-1 areas.


The undo import-route isis level-2 into level-1 command prohibits route leaking from Level-2 areas to Level-1 areas.


By default, Level-2 routing information is not leaked to Level-1
areas.





Format


import-route isis level-2
into level-1 [ filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag | direct { allow-filter-policy | allow-up-down-bit } * ] *


undo
import-route isis level-2 into level-1 [ filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name | route-policy route-policy-name } | tag tag | direct { allow-filter-policy | allow-up-down-bit } * ] *





Parameters





Parameter
Description
Value




filter-policy
Specifies a filtering policy.
-





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. Only the routes
that match the specified IP prefix can be imported.
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.





tag tag
Specifies the administrative tag value of imported routes.
The value is an integer that ranges from 1 to 4294967295.





direct allow-filter-policy

Indicates the filtering policy to filter the direct
routes. Only the IS-IS Level-1 area direct routing information that
matches the filtering policy can leak to the Level-2 area with this
parameter, and all Level-1 area direct routing information is available
to the Level-2 area without this parameter.


-





direct allow-up-down-bit

Indicates that the Up or Down bit is used during
the leak of directs routes.


If direct allow-up-down-bit is specified, the direct
routes that have already leaked to the Level-1 area have the lowest
priority and cannot leak back.


-









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


When multiple Level-1-2 switchs in a Level-1 area are
connected to a Level-2 area, Level-1 switchs are unable to know the
network topology of the Level-2 area, but forward traffic to the nearest
Level-1-2 switch (based
on the route with the smallest cost). For Level-2 switchs, however, this route
may not be the optimal one. Therefore, you need to allow some Level-2
routes to be leaked to the Level-1 area to help Level-1 switchs select the optimal route
for forwarding traffic to the Level 2 area. 


To solve the preceding
problem, IS-IS provides the route leaking function to enable Level-1
devices to choose the best path for traffic forwarding.


The import-route isis level-2 into level-1 command can be run
only on Level-1-2 routers to allow all or some Level-2 routes to be
leaked to the Level-1 area. 


Precautions 


For an ACL, when the rule command is used to configure
a filtering rule, the filtering rule is effective only with the source
address range that is specified by the source parameter and with the time period that 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 in the Level-2 area leak to the Level-1
area.


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 in the Level-1
area leak to the Level-2 area.





Example


# Configure IS-IS to perform route leaking from a Level-2
area to a Level-1 area using filtering policy 2000.


<HUAWEI> system-view


[HUAWEI] isis 1 


[HUAWEI-isis-1] import-route isis level-2 into level-1 filter-policy 2000









isis




Function


The isis command starts an IS-IS process and a specified VPN instance, and displays
the IS-IS view.


The undo isis command deletes
a specified IS-IS process.

By default, no IS-IS instance exists
on the network.



Format


isis [ process-id ] [ vpn-instance vpn-instance-name ] 


undo isis process-id





Parameters





Parameter
Description
Value




process-id
Specifies an IS-IS process ID.
The value is an integer that ranges 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.









Views


System view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


Before you configure IS-IS
functions and interface-related features, run the isis command to create an IS-IS process and enable IS-IS on the interface.


On a large-scale network, if a large number of switches run IS-IS,
there will be a huge number routes, increasing maintenance costs,
slowing down route convergence, and affecting network stability. To
resolve the problem, you can run the isis process-id command to start multi-processes to reduce the
number of routes to be maintained. 


In addition, to ensure that
different services are forwarded properly on the network, you can
run the isis vpn-instance vpn-instance-name command to start multiple IS-IS
processes on one device to isolate these services.


Follow-up
Procedure


After the isis command is used to enable an IS-IS process, run the network-entity command to set a NET for the switch, and run the isis enable command
to enable IS-IS on each interface that needs to run IS-IS. You can
start IS-IS only when these configurations are completed.


Precautions


One IS-IS process can be bound to only one
VPN instance. Multiple IS-IS interfaces can be bound to one VPN instance.


If a VPN instance is deleted, the IS-IS process bound to the VPN
instance is deleted. 


When creating an IS-IS process, bind it
to a VPN instance. An existing IS-IS process cannot be bound to any
VPN instance.





Example


# Bind IS-IS process 2 to VPN instance vpn1.


<HUAWEI> system-view


[HUAWEI] isis 2 vpn-instance vpn1









isis authentication-mode




Function


The isis authentication-mode command configures an IS-IS interface to authenticate Hello packets using the specified mode and password.


The undo isis authentication-mode command cancels the authentication
and deletes the authentication information in Hello packets.


By default, no authentication information is added to Hello packets and no authentication is performed on received Hello packets.





Format


isis authentication-mode { simple | md5 } { plain plain-text | [ cipher ] plain-cipher-text } [ level-1 | level-2 ] [ ip | osi ] [ send-only ] 


isis authentication-mode keychain keychain-name [ level-1 | level-2 ] [ send-only ]


isis authentication-mode hmac-sha256 key-id key-id { plain plain-text | [ cipher ] plain-cipher-text } [ level-1 | level-2 ] [ send-only ] 


undo isis authentication-mode [ level-1 | level-2 ]


undo isis authentication-mode keychain keychain-name [ level-1 | level-2 ] [ send-only ]


undo isis authentication-mode { simple { plain plain-text | cipher plain-cipher-text } | md5 { cipher plain-cipher-text | plain plain-text } } [ level-1 | level-2 ] [ ip | osi ] [ send-only ] 


undo isis authentication-mode hmac-sha256 key-id key-id { plain plain-text | cipher plain-cipher-text } [ level-1 | level-2 ] [ send-only ] 





Parameters





Parameter
Description
Value




simple
Indicates that the password is transmitted in plain text.
 NOTICE: 
Simple authentication has potential risks. HMAC-SHA256 cipher text authentication is recommended.




-





plain plain-text
Indicates that the password is in plain text. Only a plain-text password can be entered. The password in the configuration file is displayed in plain text.
 NOTICE: 
If plain is selected, the password
is saved in the configuration file in plain text. This brings security risks. It is recommended that you select cipher to save the password in cipher text.




The value is a string of case-sensitive characters. It contains letters and digits without spaces. In simple authentication mode, the value is a string of 1 to 16 characters. In md5 or hmac-sha256 authentication mode, the value is a string of 1 to 255 characters.





cipher plain-cipher-text
Indicates that the password is in cipher text. A plain-text or cipher-text password can be entered. The password in the configuration file is displayed in cipher text. By default, the password is in cipher text.
The value is a string of case-sensitive characters. It contains letters and digits without spaces. In simple authentication mode, the value is a string of 1 to 16 characters in plain text or a string of 32
characters in cipher text. In md5 or hmac-sha256 authentication mode, 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 that the password to be transmitted is encrypted using MD5.
 NOTICE: 
MD5 authentication has potential risks. HMAC-SHA256 cipher text authentication is recommended.




-





level-1
Indicates Level-1 authentication. When the link type of an IS-IS interface is Level-1-2, if level-1 and level-2 are not specified, both Level-1 and Level-2 Hello packets are configured
with the authentication mode and password.
-





level-2
Indicates Level-2 authentication. When the link type of an IS-IS interface is Level-1-2, if level-1 and level-2 are not specified, both Level-1 and Level-2 Hello packets are configured
with the authentication mode and password.
-





ip
Indicates the IP authentication password. This parameter cannot be configured in keychain authentication mode. If parameters ip and osi are not specified, the parameter osi is used by default.
-





osi
Indicates the OSI authentication password. This parameter cannot be configured in keychain authentication mode. If parameters ip and osi are not specified,
the parameter osi is used by default.
-





send-only
Encapsulates sent Hello packets with authentication information but does not authenticate received Hello packets.
-





keychain keychain-name
Indicates that the password is a keychain that changes with time. This parameter takes effect only when keychain-name is set using the keychain command.
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.






hmac-sha256
Encapsulates generated packets with the HMAC-SHA256 authentication and a password encrypted by the HMAC-SHA256 algorithm and authenticates received packets.
-





key-id key-id
Indicates key ID of the HMAC-SHA256 algorithm.
It is an integer ranging from 0 to 65535.













Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
To improve network security, authenticate received packets or encapsulate sent packets with authentication information. Only the packets that pass the authentication can be transmitted on the network. 


You can
use the isis authentication-mode command to discard the Hello packets whose authentication passwords are different from the authentication password configured using this command. At the same time, IS-IS adds the configured interface
authentication password into all the Hello packets sent from the local node.


Prerequisites


IS-IS has been enabled on the interface using the isis enable command.

Precautions
If a broadcast interface is emulated as a P2P interface using the isis circuit-type command and then restored to the broadcast interface using the undo isis circuit-type command, the authentication configuration of the IS-IS area is restored to the default setting. 





Example


# Set HMAC-SHA256 authentication password admin@huawei key id 33 on VLANIF100


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00


[HUAWEI-isis-1] quit


[HUAWEI] interface vlanif 100


[HUAWEI-Vlanif100] isis enable 1


[HUAWEI-Vlanif100] isis authentication-mode hmac-sha256 key-id  33 cipher admin@huawei


# Set HMAC-SHA256 authentication password admin@huawei key id 33 GE1/0/1


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis authentication-mode hmac-sha256 key-id  33 cipher admin@huawei









isis bfd




Function


The isis bfd command sets values of
BFD session parameters on a specified IS-IS interface.


The undo isis bfd command restores the default values of BFD
session parameters on a specified IS-IS interface.


By default,
BFD session parameters use default values.





Format


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


undo isis bfd { min-rx-interval [ receive-interval ] | min-tx-interval [ transmit-interval ] | detect-multiplier [ multiplier-value ] | frr-binding } *





Parameters





Parameter
Description
Value




min-rx-interval receive-interval
Specifies the minimum interval for receiving BFD packets
from the peer end.

The value is an integer, in milliseconds. If
the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01, the value ranges from 3 to 1000. Otherwise, the value ranges from
100 to 1000.By default, the minimum interval for receiving
BFD packets is 10 ms when the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01; otherwise, the minimum interval for receiving BFD packets is 1000
ms.
 NOTE: 
When the MPU is the EH1D2SRUDC00
or EH1D2SRUDC01, you need to first run the detect-engine enable command in the system
view so that the value range is 3 to 1000. If the detect-engine enable command is not used first,
the value range is 100 to 1000.











min-tx-interval transmit-interval 
Specifies the minimum interval for transmitting BFD
packets to the peer end.

The value is an integer, in milliseconds. If
the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01, the value ranges from 3 to 1000. Otherwise, the value ranges from
100 to 1000.By default, the minimum interval for receiving
BFD packets is 10 ms when the MPU is equipped with the ES0D00FSUA00 or the MPU is EH1D2SRUDC00/EH1D2SRUDC01; otherwise, the minimum interval for receiving BFD packets is 1000
ms.
 NOTE: 
When the MPU is the EH1D2SRUDC00
or EH1D2SRUDC01, you need to first run the detect-engine enable command in the system
view so that the value range is 3 to 1000. If the detect-engine enable command is not used first,
the value range is 100 to 1000.











detect-multiplier multiplier-value
Specifies the local detection multiplier.
The value is an integer that ranges from 3 to 50. The
default value is 3.





frr-binding
Binds the BFD session status to IS-IS Auto FRR. When
BFD detects the link fault on an interface, the BFD session goes Down,
triggering FRR on the interface. After that, the traffic is switched
from the faulty link to the backup link, which protects the traffic.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
BFD can quickly detect faults on
links. Configure proper parameters based on the actual network situation
to improve the IS-IS convergence speed when network faults occur.
You can use the isis bfd command to change BFD
session parameters such as the minimum interval for sending BFD packets,
minimum interval for receiving BFD packets, and local detection multiplier. 


In an IS-IS process, after IS-IS establishes a BFD session, the
value of receive-interval is obtained after the
negotiation of the local min-rx-interval value and the remote min-tx-interval value.
If no BFD packet is received from the peer end within the specified
period (receive-interval x multiplier-value), the neighbor is considered Down. 


Negotiation principle:
Actual interval for the local device to receive BFD packets = MAX
{local min-rx-interval value, remote min-tx-interval value} 

Prerequisites
BFD
has been enabled globally. In the interface view, IS-IS has been enabled
and BFD has been enabled on the interface using the isis bfd enable command.

Precautions
The BFD priority of the interface
is higher than that of the process. If BFD of the interface is enabled,
the BFD session is set up based on the BFD parameters on the interface. 





Example


# Enable BFD on VLANIF100 and set the
minimum receive interval to 600 ms and local detection multiplier
to 4.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis bfd enable
[HUAWEI-Vlanif100] isis bfd min-rx-interval 600 detect-multiplier 4


# Enable BFD on IS-IS interface and bind
the status of the BFD session to IS-IS Auto FRR.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis bfd enable
[HUAWEI-Vlanif100] isis bfd frr-binding


# Enable BFD on GE1/0/1 and set the minimum receive interval
to 600 ms and local detection multiplier to 4.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis bfd enable
[HUAWEI-GigabitEthernet1/0/1] isis bfd min-rx-interval 600 detect-multiplier 4









isis bfd block




Function


The isis bfd block command prevents
an IS-IS interface from dynamically establishing a BFD session.


The undo isis bfd block command restores the
default setting.


By default, an interface can dynamically establish
a BFD session.





Format


isis bfd block


undo
isis bfd block





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
BFD can provide millisecond-level
fault detection, help IS-IS rapidly detect the faults that occur on
neighboring devices or links, and instruct IS-IS to recalculate routes
for correct packet forwarding. If the network contains unstable links
that do not require high reliability and BFD has been enabled, a link
cannot transmit data normally when it flaps. You can use the isis bfd block command to prevent specified interfaces
from dynamically establishing BFD sessions.


Prerequisites


IS-IS has been enabled on the interface using the isis enable command.

Precautions
If the isis bfd
block, isis bfd enable, and isis bfd static commands are executed, only the last command takes effect. 





Example


# Prevent VLANIF100 from dynamically establishing
a BFD session.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis bfd block



# Prevent GE1/0/1 from dynamically establishing
a BFD session.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis bfd block









isis bfd enable




Function


The isis bfd enable command enables
BFD on a specified IS-IS interface.


The undo isis bfd
enable command disables BFD on a specified IS-IS interface.


By default, BFD is not enabled on an IS-IS interface.





Format


isis bfd enable


undo
isis bfd enable





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
BFD can provide millisecond-level
fault detection, help IS-IS to detect the faults that occur on neighboring
devices or links more rapidly, and instruct IS-IS to recalculate routes
for correct packet forwarding. The isis bfd enable command can be used to enable BFD on a specified IS-IS interface
and establish BFD sessions by using default parameters. 


Prerequisites


IS-IS has been enabled on the interface using
the isis enable command.

Precautions
If global BFD is not enabled,
you can configure BFD parameters on an interface but cannot establish
a BFD session. 


The BFD priority of the interface is higher
than the BFD priority of the process. If BFD of the interface is enabled,
the BFD session is set up based on the BFD parameters on the interface. 


If the isis bfd block, isis bfd enable, and isis
bfd static commands are run, only the last command
takes effect. 





Example


# Enable BFD on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis bfd enable



# Enable BFD on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis bfd enable









isis bfd static




Function


The isis bfd static command enables
static BFD on a specified IS-IS interface.


The undo
isis bfd static command disables static BFD on a specified
IS-IS interface.


By default, static BFD is disabled on an IS-IS
interface. 





Format


isis bfd static


undo
isis bfd static





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
In static BFD, BFD session parameters
are set manually and BFD session establishment requests are delivered
manually. Then static BFD can quickly detect faults on links. You
can run the isis bfd static command to enable static
BFD on a specified interface to establish static BFD sessions on specified
links.


Prerequisites


IS-IS has been enabled on
the interface using the isis enable command.

Precautions
If the isis bfd block, isis bfd enable, and isis bfd static commands are run, only the
last command takes effect. 





Example


# Enable static BFD on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis bfd static



# Enable static BFD on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis bfd static









isis circuit-level




Function


The isis circuit-level command sets
the link type of an interface on a Level-1-2 router.


The undo isis circuit-level command restores the default link
type of an interface on a Level-1-2 router.


By default, the
link type of an interface on a Level-1-2 router is Level-1-2, and
both Level-1 and Level-2 neighbor relationships can be established
on the interface.





Format


isis circuit-level [ level-1 | level-1-2 | level-2 ]


undo isis circuit-level





Parameters





Parameter
Description
Value




level-1
Specifies the Level-1 link type. That is, only Level-1
neighbor relationship can be established on the interface.
-





level-1-2
Specifies the Level-2 link type. That is, both Level-1
and Level-2 neighbor relationships can be established on the interface.
-





level-2
Specifies the Level-2 link type. That is, only Level-2
neighbor relationship can be established on the interface.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


When an adjacency is established
between a Level-1-2 router and a remote device, the Level-1-2 router
sends and receives both Level-1 and Level-2 Hello packets, wasting
bandwidth and memory resources. To solve this problem, run the isis circuit-level command to set a specified link type
for an interface.  


Prerequisites


IS-IS has been
enabled using the isis enable command in the interface view.  


Precautions 


Network flapping may occur if the link
type of an IS-IS interface is changed during network operation. Therefore,
setting a link type for an IS-IS interface on the switch when configuring IS-IS
is recommended.


The configuration of the isis circuit-level command takes effect only when the IS-IS system type is Level-1-2.
Otherwise, the level configured using the is-level command is
used as the link type.





Example


# If VLANIF100 is connected to a non-backbone
router in the same area, set this interface to Level-1, and prohibit
the interface from sending and receiving Level-2 Hello packets. 


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis circuit-level level-1


# If GE1/0/1 is connected to a non-backbone
router in the same area, set this interface to Level-1, and prohibit
the interface from sending and receiving Level-2 Hello packets. 


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-level level-1







Related Topics








isis circuit-type




Function


The isis circuit-type command simulates the network type of an IS-IS broadcast interface to a P2P interface.


The undo isis circuit-type command restores the default network type of an IS-IS interface.


By default, the network type of an interface is determined by the physical type of the interface.





Format


isis circuit-type p2p  [ strict-snpa-check ]


undo isis circuit-type





Parameters





Parameter
Description
Value




p2p
Sets the network type of an IS-IS interface to P2P.
-






strict-snpa-check
Enables IS-IS to check the SNPA address of each received LSP or SNP.
-










Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


The network type of IS-IS interfaces at the ends of the link must be identical. Otherwise, the two interfaces cannot set up the neighbor relationship. In most cases, the network types of interfaces on a broadcast
network and a P2P network are Ethernet and P2P respectively.


The isis circuit-type command sets the network type of an interface to simulate a P2P interface so that the network type of IS-IS interfaces at the ends of the link
is identical and the neighbor relationship can be established between them.


When an IS-IS neighbor relationship is established between a P2P interface and a simulated P2P interface and the simulated P2P interface has direct neighbors, the P2P interface may
receive unneeded packets from these direct neighbors. To prevent the P2P interface from accepting these unneeded packets, specify strict-snpa-check in the isis circuit-type command to enable IS-IS to check
the SNPA address of each received LSP or SNP. After the command is run, the P2P interface accepts only the packets whose SNPA addresses are included in the local neighbor address list, which improves network security.


Precautions 


For an interface enabled with IS-IS using
the isis enable command, when the network type of an interface changes, the corresponding configurations change. Details are as follows:
    

  • After a broadcast interface is simulated as a P2P interface using the isis circuit-type command, the interval for sending Hello packets, the number of Hello packets that IS-IS does not receive from a neighbor before the neighbor
is declared Down, interval for resending LSP packets on a P2P link, and various IS-IS authentication modes are restored to the default settings; other configurations such as the DIS priority, DIS name, and interval for sending CSNP packets on a broadcast
network become invalid. 
    

    • 

  • After the undo isis circuit-type command is run to restore the network type of an IS-IS interface, the interval for sending Hello packets, the number of Hello packets that IS-IS does not receive from a neighbor before the
neighbor is declared Down, interval for resending LSP packets on a P2P link, various IS-IS authentication modes, DIS priority, and interval for sending CSNP packets on a broadcast network are restored to the default settings. 
    

    • 








Example


# Set the network type of VLANIF100 to P2P.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis circuit-type p2p


# Set the network type of GE1/0/1 to P2P.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-type p2p







Related Topics







isis cost




Function


The isis cost command sets the link
cost value of an IS-IS interface.


The undo isis cost command restores the default link cost value of an IS-IS interface.


By default, the link cost value of an IS-IS interface is 10.





Format


isis cost { cost | maximum } [ level-1 | level-2 ] 


undo isis cost [ cost | maximum ] [ level-1 | level-2 ] 





Parameters





Parameter
Description
Value




cost
Specifies the link cost value of an interface.
The value is an integer that varies according to the
cost style. 
    

  • When the cost style is narrow, narrow-compatible, or compatible, the value ranges from 1 to 63.
    • 

  • When the cost style is wide or wide-compatible, the value ranges from 1 to 16777214.
    • 


 The default value is 10.		





maximum
Sets the link cost of IS-IS interfaces to 16777215.
 NOTE: 
You can configure this parameter only when the IS-IS
cost style is wide or wide-compatible. After the interface cost is
set to 16777215, the neighbor TLV generated on the link can only be
used to transmit TE information but cannot be used for route calculation.




-






level-1
Specifies the link cost value of a Level-1 interface.
If the interface level is not specified, link cost values of Level-1
and Level-2 interfaces are set.
-





level-2
Specifies the link cost value of a Level-2 interface.
If the interface level is not specified, link cost values of Level-1
and Level-2 interfaces are set.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


On large networks, there
may be multiple valid routes to the same destination. IS-IS uses the
SPF algorithm to calculate an optimal route and transmits traffic
over it, which brings the following problems: 
    

  • All traffic is transmitted over the optimal route, causing
load imbalance. 
    

    • 

  • If the optimal route is faulty, traffic will get lost. 
    

    • 





To solve the preceding problems, run the isis
cost command to set a link cost for interfaces so that traffic
can be transmitted over different physical links.  


Prerequisites


IS-IS has been enabled on the interface using the isis enable command.


Configuration Impact 


If the
link cost of an interface is changed, routes will be re-calculated
on the whole network, causing the changes in traffic forwarding paths.
 


Precautions 


On
the TE tunnel interface that is enabled with IGP shortcut, the link
cost is the value specified through the mpls te igp metric command. If the command is not configured, the IS-IS cost
is adopted as the link cost of the TE tunnel interface. 


The priority of the circuit-cost command is lower than that
of the isis cost command.  





Example


# Set the Level-2 link cost of VLANIF100 to 5.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis cost 5 level-2



# Set the Level-2
link cost of GE1/0/1 to 5.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis cost 5 level-2









isis delay-peer




Function


The isis delay-peer command configures
a delay for an interface so that the interface delays establishing
neighbor relationships after the neighbor relationship with the last
neighbor goes Down due to packet timeout.


The undo
isis delay-peer command deletes the configured delay and
restores the default configurations.


By default, if the neighbor
relationship goes Down due to packet timeout, the interface re-establishes
the neighbor relationship after it receives a new Hello packet.





Format


isis delay-peer track last-peer-expired [ delay-time delay-interval ]


undo isis delay-peer [ track last-peer-expired [ delay-time delay-interval ] ]





Parameters





Parameter
Description
Value




track
Tracks the mode of the neighbor relationship establishment
delay.
-





last-peer-expired
Indicates that neighbor relationship establishment is
delayed after the neighbor relationship with the last neighbor goes
Down due to packet timeout.
-





delay-time delay-interval
Specifies the neighbor relationship establishment delay.
The value is an integer ranging from 1 to 3600, in
seconds. The default value is 60 seconds.









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


On IS-IS networks, devices
at both ends of a link establish a neighbor relationship by exchanging
Hello packets. After the neighbor relationship is established, both
devices need to send Hello packets at a specified interval to maintain
the neighbor relationship. If an IS-IS device does not receive any
Hello packets from the neighbor at the other end within the specified
period (Holddown time), the local device considers the neighbor Down
and re-establishes the neighbor relationship after it receives a new
Hello packet. If links are unstable or some Hello packets are lost
or incorrect due to network transmission delay or poor transmission,
neighbor relationships may alternate between Up and Down frequently,
which causes a route flapping. 


To address this issue, run the isis delay-peer command to configure a neighbor relationship
establishment delay after the neighbor relationship goes Down.


Pre-configuration Tasks


IS-IS has been enabled using
the isis enable command in the interface view.


Precautions


If a new delay-interval is configured and it
is less than the remaining time of the ongoing delay, the new delay-interval takes effect immediately; if the new delay-interval is greater than the remaining time of the
ongoing delay, the ongoing delay continues until the new delay-interval takes effect at the next delay.





Example


# Set the delay to 100s on VLANIF100 so that the neighbor relationship establishment is delayed
after the neighbor relationship with the last neighbor goes Down due
to packet timeout.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis delay-peer track last-peer-expired delay-time 100


# Set the delay
to 100s on GE1/0/1 so that the neighbor relationship
establishment is delayed after the neighbor relationship with the
last neighbor goes Down due to packet timeout.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis delay-peer track last-peer-expired delay-time 100







Related Topics







isis dis-name




Function


The isis dis-name command configures a host name for the DIS.


The undo isis dis-name command deletes the host name configured for the DIS.


By default, no host name is configured for the
DIS.





Format


isis dis-name symbolic-name


undo isis dis-name





Parameters





Parameter
Description
Value




symbolic-name
Specifies a host name for the DIS.
The value is a string of 1 to 64 characters without spaces. It is case sensitive.
 NOTE: 
When double quotation marks are used around the string, spaces are allowed in the string.











Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


You can configure the name for the DIS on an interface only after you run the isis enable command to enable IS-IS on the interface. The DIS name is advertised in a pseudo-node
LSP. In this manner, the configured DIS name is associated with the system ID of the DIS.


 NOTE: 
This command takes effect only on the DIS in the broadcast network.


If the isis circuit-type command is run to emulate the interface as a P2P interface, the isis dis-name command becomes invalid on the interface; after the undo
isis circuit-type command is run to restore the broadcast interface, the isis dis-name command becomes valid on the interface. 







Example


# Configure a host name for the DIS on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis dis-name LOCALAREA


# Configure a host name
for the DIS on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis dis-name LOCALAREA









isis dis-priority




Function


The isis dis-priority command sets
the priority of the IS-IS interface that is a candidate for the DIS
at a specified level.


The undo isis dis-priority command restores the default priority.


By default, the DIS
priority of broadcast IS-IS interfaces at Level-1 and Level-2 is 64.





Format


isis dis-priority priority [ level-1 | level-2 ]


undo
isis dis-priority [ priority ] [ level-1 | level-2 ]





Parameters





Parameter
Description
Value




priority
Specifies the priority for DIS election.
The value is an integer that ranges from 0 to 127.
The default value is 64. A larger value indicates a higher DIS priority.





level-1
Indicates the DIS priority of interfaces at Level 1.
If the level is not specified, the same priority is set for Level-1
and Level-2 interfaces.
-





level-2
Indicates the DIS priority of interfaces at Level 2.
If the level is not specified, the same priority is set for Level-1
and Level-2 interfaces.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


The configuration is useful only for the broadcast network.


The DIS priority is advertised through Hello packets. The switch with the highest priority
is elected as the DIS. In the case of the same priority, the switch with the largest MAC
address is elected as the DIS.


 NOTE: 
IS-IS has been
enabled on the interface using the isis enable command.


If the isis circuit-type command is run to emulate the interface as a P2P interface,
the isis dis-priority command becomes invalid on
the interface; after the undo isis circuit-type command is run to
restore the broadcast interface, the isis dis-priority command becomes valid on the interface. 







Example


# Set the Level-2 priority for electing the DIS to
127 on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis dis-priority 127 level-2



# Set the Level-2 priority for electing the DIS to 127 on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis dis-priority 127 level-2







Related Topics







isis enable




Function


The isis enable command enables IS-IS
on an interface and specifies the ID of the IS-IS process to be associated
with the interface.


The undo isis enable command
disables IS-IS on an interface and cancels the ID of the IS-IS process
associated with the interface.


By default, IS-IS is disabled
on an interface.





Format


isis enable [ process-id ]


undo isis enable





Parameters





Parameter
Description
Value




process-id
Specifies an IS-IS process ID.
The value is an integer that ranges from 1 to 65535. The default value is 1.









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


After an IS-IS process is
configured in the system view, to make the IS-IS protocol function
normally, enable IS-IS on an interface to associate the interface
with the IS-IS process.


Prerequisites 


An IS-IS
process has been enabled using the isis command in the system view.  

Precautions
An interface can be associated with only one IS-IS
process.





Example


# Create IS-IS process 1 and activate the process on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] network-entity 10.0001.1010.1020.1030.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1


# Create IS-IS process 1 and activate the process on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] network-entity 10.0001.1010.1020.1030.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1







Related Topics







isis lfa-backup




Function


The isis lfa-backup command enables
an IS-IS interface to participate in loop-free alternate (LFA) calculation
so that the interface can be a candidate for a backup interface.


The undo isis lfa-backup command disables an
IS-IS interface from participating in LFA calculation.


By default,
an IS-IS interface can participate in LFA calculation.





Format


isis lfa-backup [ level-1 | level-2 | level-1-2 ]


undo isis
lfa-backup [ level-1 | level-2 | level-1-2 ]





Parameters





Parameter
Description
Value




level-1
Indicates that an interface can be a backup interface
in Level-1 areas.
-





level-2
Indicates that an interface can be a backup interface
in Level-2 areas.
-





level-1-2
Indicates that an interface can be a backup interface
in both Level-1 and Level-2 areas.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


To facilitate traffic management and avoid the uncertainty
in the traffic forwarding path in the case the primary link fails,
run the undo isis lfa-backup command
on some interfaces to disable them from participating in LFA calculation. 


IS-IS has been enabled on the interface using the isis enable command.





Example


# Disable VLANIF100 from becoming a backup
interface for IS-IS Auto FRR.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] undo isis lfa-backup



#
Disable GE1/0/1 from becoming a backup interface
for IS-IS Auto FRR.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] undo isis lfa-backup









isis lsp seq-overflow auto-recover disable




Function


The isis lsp seq-overflow auto-recover disable command prevents an IS-IS system from changing its system ID when
it receives a locally generated LSP with the maximum sequence number
(0xFFFFFFFF).


The undo isis lsp seq-overflow auto-recover
disable command restores the default configuration.


By default, an IS-IS system changes its system ID when it receives
a locally generated LSP with the maximum sequence number.





Format


isis lsp seq-overflow auto-recover disable


undo isis lsp seq-overflow auto-recover disable





Parameters


None





Views


System view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


On an IS-IS network, if a
device receives a locally generated LSP with the sequence number greater
than that of the corresponding LSP stored locally, the device adds
1 to the sequence number of the received LSP and floods it. An attacker
may send an IS-IS LSP with the maximum sequence number (0xFFFFFFFF)
and the system ID of a target device. Upon receipt of the LSP, the
target device considers it a locally generated LSP because it carries
the local system ID and adds 1 to the sequence number because the
sequence number is greater than that of the corresponding LSP stored
locally. Consequently, the sequence number exceeds the maximum number,
causing the target device to enter the hibernation state. The state
can last 18 hours and 1 minute, affecting network operation. To prevent
this problem, an IS-IS system changes its system ID when it receives
a locally generated LSP with the sequence number of 0xFFFFFFFF. However,
if the IS-IS system has changed its system ID for three times within
24 hours when it receives one more such an LSP, it directly enters
the hibernation state.


The preceding function also applies to
CSNPs and PSNPs.


By default, an IS-IS system changes its system
ID when it receives a locally generated LSP with the maximum sequence
number. To disable this function, run the isis lsp seq-overflow
auto-recover disable command.





Example


# Prevent an IS-IS system from changing its system
ID when it receives a locally generated LSP with the maximum sequence
number (0xFFFFFFFF).


<HUAWEI> system-view


[HUAWEI] isis lsp seq-overflow auto-recover disable









isis mesh-group




Function


The isis mesh-group command adds an
IS-IS interface to a specified mesh group.


The undo
isis mesh-group command deletes an IS-IS interface from
a specified mesh group.


By default, an IS-IS interface does
not belong to any mesh group and floods LSPs normally.





Format


isis mesh-group { mesh-group-number | mesh-blocked }


undo
isis mesh-group





Parameters





Parameter
Description
Value




mesh-group-number
Specifies the mesh group number.
The value is an integer that ranges from 1 to 4294967295.





mesh-blocked
Blocks an interface to prevent it from flooding received
LSPs to other interfaces.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


When receiving LSPs, the interface,
not in the mesh group, floods the LSPs to other interfaces following
the normal procedure. For the NBMA network that is with higher connectivity
and several P2P links, this process causes repeated LSP flooding and
wastes bandwidth. 


After receiving LSPs, the interface that
joins a mesh group only floods the LSPs to the interfaces that are
not in the local mesh group. 


Prerequisites


IS-IS
has been enabled on the interface using the isis enable command.


Precautions


When adding interfaces to mesh groups
or blocking interfaces, keep certain interfaces from being configured
with the isis mesh-group command. This can prevent link faults from
affecting the normal spreading of LSPs. 





Example


# Add VLANIF100 to mesh group 3.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis mesh-group 3



# Add GE1/0/1 to mesh group 3.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis mesh-group 3









isis padding-hello




Function


The isis padding-hello command configures
an IS-IS interface to send Hello packets with the padding field.


The undo isis padding-hello command restores
the default setting.


By default, an IS-IS interface is not configured
to send Hello packets with the padding field.





Format


isis padding-hello


undo isis padding-hello





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


The isis padding-hello and isis small-hello commands are mutually exclusive and cannot be configured
on the same interface simultaneously. 


If an interface that
is not configured with the two commands, it sends Hello packets based
on the following rules: 


    

  • For a P2P interface 
    

      

    • Before the P2P neighbor relationship is established, the P2P
interface sends Hello packets with the padding field. 
      

      • 

    • After the P2P neighbor relationship is established, the P2P
interface sends Hello packets without the padding field. 
      

      • 

    

     NOTE: 
    For a P2P interface, the length of padding field is equal to the
length of LSP packets orignate by local IS.
    

    

    • 

  • For a broadcast interface 
    

    It sends Hello packets with
the padding field. 
    

     NOTE: 
    For a broadcast interface, the length
of padding field is equal to the length of MTU.
    

    

    • 



IS-IS has been enabled on the interface using the isis enable command.





Example


# Configure VLANIF100 to send Hello packets
with the padding field.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis padding-hello



# Configure GE1/0/1 to send Hello packets with the
padding field.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis padding-hello







Related Topics







isis peer-ip-ignore




Function


The isis peer-ip-ignore command configures
IS-IS not to check the IP address of Hello packets received by an
interface.


The undo isis peer-ip-ignore command
restores the default setting.


By default, IS-IS checks the IP
address of received Hello packets.





Format


isis peer-ip-ignore


undo isis peer-ip-ignore





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
By default, IS-IS checks the IP address
carried in the Hello packet. The neighbor relationship can be set
up only when the local interface address and the interface address
carried in the received packets belong to the same network segment.
When the two interface IP addresses are not in the same network segment,
if the isis peer-ip-ignore command is used, the
check on the peer IP address is ignored, and the two IS-IS interfaces
can set up normal neighbor relationship. Routes of this two network
segments exist in the routing table, but cannot ping through each
other. 

Precautions
This command is valid for P2P interfaces,
NBMA interfaces and the interface with the network type configured
to P2P by using the isis circuit-type p2p command. The command takes effect only when the command is used
on the two ends of the link. 


 NOTE: 
    

  • For the broadcast interface, you can run the isis
peer-ip-ignore command only after you run the isis circuit-type p2p command. The isis circuit-type p2p command is valid only for the broadcast
interface.
    

    • 

  • For the P2P and NBMA interfaces, you can run the isis
peer-ip-ignore command without running the isis circuit-type p2p command.
    

    • 








Example


# Configure VLANIF100 not to check the IP
address of the Hello packets sent by the peer.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis circuit-type p2p
[HUAWEI-Vlanif100] isis peer-ip-ignore


# Configure GE1/0/1 not to check the IP address of
the Hello packets sent by the peer.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-type p2p
[HUAWEI-GigabitEthernet1/0/1] isis peer-ip-ignore







Related Topics







isis ppp-negotiation




Function


The isis ppp-negotiation command specifies
the PPP negotiation mode for establishing neighbor relationships.


The undo isis ppp-negotiation command restores
the default negotiation mode.


By default, the 3-way handshake
mode is used.





Format


isis ppp-negotiation { 2-way | 3-way [ only ] }


undo isis ppp-negotiation





Parameters





Parameter
Description
Value




2-way
Establishes the neighbor relationship using the 2-way
handshake negotiation mode.
-





3-way
Establishes the neighbor relationship using the 3-way
handshake negotiation mode.
-





only
Establishes the neighbor relationship using the 3-way
handshake negotiation mode that is not backward compatible.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


The 3-way handshake negotiation mode is backward compatible.
If the neighbor only supports 2-way handshake, use the the 2-way handshake
negotiation mode to establish a neighbor relationship.


The command
is applicable only for P2P interfaces. It can be used on the broadcast
interfaces only after the circuit type is set to P2P. 





Example


# Establish the neighbor relationship on VLANIF100 using the 2-way handshake negotiation mode. 


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis circuit-type p2p
[HUAWEI-Vlanif100] isis ppp-negotiation 2-way


# Establish the neighbor relationship on GE1/0/1 using the 2-way handshake negotiation mode. 


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-type p2p
[HUAWEI-GigabitEthernet1/0/1] isis ppp-negotiation 2-way







Related Topics







isis ppp-osicp-check




Function


The isis ppp-osicp-check command enables
OSICP negotiation check on a PPP interface. The negotiation status
can affect IS-IS interface status.


The undo isis ppp-osicp-check command restores the default setting.


By default, IS-IS does
not check OSICP status of PPP.





Format


isis ppp-osicp-check


undo isis ppp-osicp-check





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
By default, OSCIP status of PPP does
not affect IS-IS interface status.


After this command is configured,
OSI network negotiation status of PPP can affect IS-IS interface status.
When PPP senses that the OSI network fails, the link status of the
IS-IS interface turns Down and the route to the network segment where
the interface resides is not advertised through LSP.

Precautions
This command applies to only PPP interfaces. For other point-to-point
interfaces, this command is invalid.





Example


# Configure VLANIF100 to check OSICP status of PPP.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit


[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis circuit-type p2p
[HUAWEI-Vlanif100] isis ppp-osicp-check


# Configure GE1/0/1 to check OSICP status of PPP.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-type p2p
[HUAWEI-GigabitEthernet1/0/1] isis ppp-osicp-check









isis purge-lsp auto-protect disable




Function


The isis purge-lsp auto-protect disable command disables IS-IS purge LSPs from triggering master/slave main
control board switchovers.


The undo isis purge-lsp
auto-protect disable command restores the default configuration.


By default, IS-IS purge LSPs trigger master/slave main control
board switchovers.





Format


isis purge-lsp auto-protect disable


undo isis purge-lsp auto-protect disable





Parameters


None





Views


System view





Default Level


2: Configuration level





Usage Guidelines


When an IS-IS process on a device proactively sends a
purge LSP, the device deletes the corresponding LSP and floods it
to the network. In most cases, before the device sends a purge LSP,
the end that generated the corresponding LSP sends an updated LSP.
If the clock on the device runs fast, the device frequently floods
purge LSPs to devices on the entire network, causing network flapping.
If the device generates more than five purge LSPs for 80% or more
non-pseudonode LSPs with a non-zero fragment number in the local LSDB
within 6500s, a master/slave main control board switchover is performed
if the device has two main control boards, or the device is restarted
if it has only one main control board. The switchover or restart prevents
network flapping.


By default, IS-IS purge LSPs trigger master/slave
main control board switchovers. To disable IS-IS purge LSPs from triggering
master/slave main control board switchovers, run the isis
purge-lsp auto-protect disable command.





Example


# Disable IS-IS purge LSPs from triggering master/slave
main control board switchovers.


<HUAWEI> system-view
[HUAWEI] isis purge-lsp auto-protect disable









isis silent




Function


The isis silent command configures
an IS-IS interface as a silent interface. That is, the interface is
suppressed from sending and receiving IS-IS packets, but routes of
the network segment on which the interface resides can be advertised.


The undo isis silent command restores the default
setting.


By default, no IS-IS interface is configured as a silent
interface.





Format


isis silent [ advertise-zero-cost ]


undo isis silent





Parameters








Parameter 

Description

Value









advertise-zero-cost

Specifies the route cost as 0. The default cost of IS-IS routes
is 10.

-














Views


 
Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
When an IS-IS network is connected
to other ASs, it is required to enable IS-IS on the interfaces that
connect the IS-IS network to other ASs so that the switch on the IS-IS network
can learn the routes to other ASs. This interface, however, unnecessarily
advertises IS-IS Hello packets on its network segment. In this case,
you can run the isis silent command to suppress
the IS-IS interface. 


Prerequisites


IS-IS has been
enabled on the interface using the isis enable command.





Example


# Configure VLANIF100 as a silent interface.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis silent



# Configure GE1/0/1 as a silent interface.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis silent







Related Topics







isis small-hello




Function


The isis small-hello command configures
an IS-IS interface to send Hello packets without the padding field.


The undo isis small-hello command restores
the default setting.


By default, an IS-IS interface is not configured
to send Hello packets without the padding field.





Format


isis small-hello


undo
isis small-hello





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


The command can simplify the operations of sending and
receiving Hello packets.


The isis small-hello and isis
padding-hello commands are mutually exclusive and
cannot be configured on the same interface simultaneously.


If
an interface is not configured with the two commands, it sends Hello
packets based on the following rules:


    

  • P2P interface
    

      

    • Before the P2P neighbor relationship is established, the P2P
interface sends Hello packets with the padding field.
      

      • 

    • After the P2P neighbor relationship is established, the P2P
interface sends Hello packets without the padding field.
      

      • 

    

     NOTE: 
    For a P2P interface, the length of padding field is equal to the
length of LSP packets orignate by local IS.
    

    

    • 

  • Broadcast interface
    

    The interface sends Hello packets
with the padding field.
    

     NOTE: 
    For a broadcast interface, the length
of padding field is equal to the length of MTU.
    

    

    • 



Before running this command on an interface, run the isis enable command on the interface to enable IS-IS.





Example


# Configure VLANIF100 to send Hello packets
without the padding field.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis small-hello



# Configure GE1/0/1 to send Hello packets without
the padding field.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis small-hello







Related Topics







isis suppress-flapping peer




Function


The isis suppress-flapping peer command
configures detection parameters for IS-IS neighbor relationship flapping
suppression.


The undo isis suppress-flapping peer command restores the default detection parameters.


By default,
the detection interval of IS-IS neighbor relationship flapping suppression
is 60s, the suppression threshold is 10, and the interval for exiting
from suppression is 120s.





Format


isis suppress-flapping peer { detecting-interval detecting-interval | threshold threshold | resume-interval resume-interval } *


undo isis suppress-flapping peer { detecting-interval [ detecting-interval ] | threshold [ threshold ] | resume-interval [ resume-interval ] } *





Parameters





Parameter
Description
Value




detecting-interval detecting-interval

Specifies the detection interval of IS-IS neighbor
relationship flapping suppression.


Each IS-IS interface on which
IS-IS 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 IS-IS 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 the interval for exiting from IS-IS 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.
    

    • 

  • If IS-IS neighbor relationship flapping suppression works in
hold-max-cost mode, resume-interval indicates the
duration of this mode.
    

    • 



 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 IS-IS neighbor relationship flapping suppression on an interface,
run the isis suppress-flapping peer command. However,
keeping the default configurations is recommended.


Prerequisites


IS-IS 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 IS-IS 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] isis suppress-flapping peer detecting-interval 5 threshold 40 resume-interval 20









isis suppress-flapping peer disable




Function


The isis suppress-flapping peer disable command disables IS-IS neighbor relationship flapping suppression
from an interface.


The undo isis suppress-flapping
peer disable command enables IS-IS neighbor relationship
flapping suppression on an interface.


By default, IS-IS neighbor
relationship flapping suppression is enabled on all interfaces.





Format


isis suppress-flapping peer disable


undo isis suppress-flapping peer disable





Parameters


None





Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


By default, IS-IS neighbor
relationship flapping suppression is enabled on all interfaces in
the same IS-IS process. To disable the function from one of the interfaces,
run the isis suppress-flapping peer disable command.


 NOTE: 
When an interface enters the flapping suppression
state, all neighbor relationships on the interface enter the state
accordingly.


Prerequisites


IS-IS neighbor relationship
flapping suppression must have been enabled globally before you enable
the function on an interface using the undo isis 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 first. 





Example


# Disable IS-IS neighbor relationship flapping suppression
from VLANIF100.


<HUAWEI> system-view


[HUAWEI] interface vlanif 100


[HUAWEI-Vlanif100] isis suppress-flapping peer disable









isis suppress-flapping peer hold-down




Function


The isis suppress-flapping peer hold-down command configures the Hold-down mode and sets duration for this
mode.


The undo isis suppress-flapping peer hold-down command cancels the Hold-down mode.


By default, the Hold-down
mode is disabled.





Format


isis suppress-flapping peer hold-down interval


undo isis suppress-flapping
peer hold-down [ interval ]





Parameters





Parameter
Description
Value




interval
Specifies the duration of the Hold-down mode.
The value is an integer ranging from 1 to 600, in seconds.









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 the maximum value (16777214 for the wide mode and
63 for the narrow mode) 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 duration
for this mode, run the isis suppress-flapping peer hold-down interval command. 


Prerequisites


IS-IS neighbor relationship flapping suppression must have
been enabled globally before you configure the Hold-down mode and
set 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 before you configure
the Hold-down mode and set duration for this mode.





Example


# Configure the Hold-down mode and set its duration
to 200s on VLANIF100.


<HUAWEI> system-view


[HUAWEI] interface vlanif 100


[HUAWEI-Vlanif100] isis suppress-flapping peer hold-down 200









isis suppress-flapping peer hold-max-cost disable




Function


The isis suppress-flapping peer hold-max-cost
disable command disables the Hold-max-cost mode.


The undo isis suppress-flapping peer hold-max-cost disable command
enables the Hold-max-cost mode.


By default, the Hold-max-cost
mode is enabled.





Format


isis suppress-flapping peer hold-max-cost disable


undo isis 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 synchronization attempts and packet exchanges.
    • 

  • Hold-max-cost mode: If the traffic forwarding path changes frequently,
interfaces use the maximum value (16777214 for the wide mode and 63
for the narrow mode) as the cost of the flapping link during Hold-max-cost
suppression, which prevents traffic from passing through the flapping
link. If a device on a key path is isolated from the network due to
IS-IS neighbor relationship flapping, the network is separated into
two isolated parts. To prevent this problem, use the Hold-max-cost
mode on the key path.
    • 



If the neighbor relationship does not go Down within successive resume-intervals, or the interval between two successive neighbor
Down events is greater than or equal to resume-interval, the
suppression in Hold-max-cost mode exits.


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 duration for this mode, run the isis suppress-flapping
peer hold-down interval command. 


Precautions


The Hold-max-cost mode takes effect only
unidirectionally. If a remote device does not support IS-IS 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] isis suppress-flapping peer hold-max-cost disable









isis suppress-reachability




Function


The isis suppress-reachability command
suppresses the advertisement of direct routes on an IS-IS interface
in a specified topology.


The undo isis suppress-reachability command restores the default setting.


By default, direct routes
on an IS-IS interface are advertised.





Format


isis suppress-reachability [ level-1 | level-1-2 | level-2 ]


undo isis suppress-reachability





Parameters





Parameter
Description
Value




level-1
Indicates that the advertisement of IPv4 addresses is
suppressed on Level-1 interfaces. If the level is not specified, the
advertisement of IPv6 addresses on Level-1 and Level-2 interfaces
is suppressed.
-





level-1-2
Indicates that the advertisement of IPv4 addresses is
suppressed on Level-1 and Level-2 interfaces.
-





level-2
Indicates that the advertisement of IPv4 addresses is
suppressed on Level-2 interfaces. If the level is not specified, the
advertisement of IPv4 addresses is suppressed on Level-1 and Level-2
interfaces.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Before running this command on an interface, run the isis enable command on the interface to enable IS-IS.





Example


# Suppress the advertisement of IPv4 addresses on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis suppress-reachability



# Suppress the advertisement of IPv4 addresses on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis suppress-reachability









isis system-id auto-recover disable




Function


The isis system-id auto-recover disable command disables the system from automatically resolving IS-IS system
ID conflicts.


The undo isis system-id auto-recover
disable command enables the system to automatically resolve
IS-IS system ID conflicts.


By default, if the system detects
an IS-IS system ID conflict, it automatically changes the local system
ID to resolve the conflict.





Format


isis system-id auto-recover disable


undo isis system-id auto-recover disable





Parameters


None





Views


System view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


A system ID uniquely identifies
an IS-IS device. If the same system ID is configured for more than
one device on the network, a routing loop may occur. By default, if
the system detects an IS-IS system ID conflict, it automatically changes
the local system ID to resolve the conflict.


To disable the
system from automatically resolving IS-IS system ID conflicts, run
the isis system-id auto-recover disable command.
After the command is run, IS-IS system ID conflicts need to be manually
resolved.


 NOTE: 
The first two bytes of the system
ID automatically changed by the system are Fs, and the last four bytes
are randomly generated. For example, FFFF:1234:5678 is such a system
ID.




Precautions


If an IS-IS system ID conflict
occurs between two directly connected devices, a neighbor relationship
fails to be established only between the two devices, without affecting
the entire network. As a result, the conflict is not automatically
resolved in this case.


On broadcast networks, the system ID
generated automatically is not recorded in the configuration file.
If the device is restarted, the system restores this system ID to
the originally configured one and then generates another one, which
may be different from the one last generated automatically. If the
conflict persists after the system automatically generates three system
IDs, the system no longer resolves this conflict.





Example


# Disable the system to automatically resolve IS-IS
system ID conflicts.


<HUAWEI> system-view


[HUAWEI] isis system-id auto-recover disable









isis tag-value




Function


The isis tag-value command sets the
administrative tag value of an IS-IS interface.


The undo isis tag-value command deletes the administrative
tag value on an IS-IS interface.


By default, an IS-IS interface
has no administrative tag value.





Format


isis tag-value tag [ level-1 | level-2 ]


undo isis tag-value [ tag ]
[ level-1 | level-2 ]





Parameters





Parameter
Description
Value




tag
Specifies the administrative tag of an IS-IS interface.
The value is an integer that ranges from 1 to 4294967295.





level-1
Indicates the administrative tag value of a Level-1
interface. If the interface level is not specified, the administrative
tag value is set for Level-1 and Level-2 interfaces. 
-





level-2
Indicates the administrative tag value of a Level-2
interface. If the interface level is not specified, the administrative
tag value is set for Level-1 and Level-2 interfaces. 
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


An administrative tag carries
administrative information about IP address prefixes. The tag can
be used to import routes of different levels and different areas.
Administrative tags can advertise IP address prefixes in an IS-IS
routing domain to control routes and simplify management. 


Using
the isis tag-value command, you can set the administrative
tag value for all routes of a specified IS-IS process. The tag can
be used as a filtering condition of a route-policy to filter routes. 


Prerequisites


IS-IS has been enabled on the interface
using the isis
enable command.


Precautions


The
advertised LSPs contain the administrative tag value only when the
IS-IS cost style is wide, wide-compatible, or compatible. 


The
administrative tag value set using the isis tag-value command has a higher priority than the administrative tag value
set using the circuit default-tag command. 





Example


# Set the administrative tag value of VLANIF100 to 77.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis tag-value 77



# Set the administrative tag value of GE1/0/1 to 77.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis tag-value 77









isis timer csnp




Function


The isis timer csnp command sets the
interval for sending CSNPs on a broadcast network.


The undo isis timer csnp command restores the default setting.


By default, the interval for sending CSNPs on a broadcast network
is 10 seconds.





Format


isis timer csnp csnp-interval [ level-1 | level-2 ]


undo
isis timer csnp [ csnp-interval ] [ level-1 | level-2 ]





Parameters





Parameter
Description
Value




csnp-interval
Specifies the interval for sending CSNPs on a broadcast
network.
The value is an integer that ranges from 1 to 65535,
in seconds. The default value is 10 seconds.





level-1
Indicates the interval for sending Level-1 CSNPs. If
no level is specified, the interval for the IS-IS process of the current
level to send CSNP packets is set by default.
-





level-2
Indicates the interval for sending Level-2 CSNPs. If
no level is specified, the interval for the IS-IS process of the current
level to send CSNP packets is set by default.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


In a broadcast network, a
DIS sends CSNPs periodically to enable all devices to synchronize
LSDBs with one another. If a device finds that the local LSDB does
not have a specific LSP or an existing LSPs is not the latest one
after the device has received a CSNP, the device will send a PSNP
to request the corresponding LSP. Only a DIS sends CSNPs periodically.
Therefore, the isis timer csnp command will take
effect only on a broadcast interface of the DIS. This command can
be used to set an interval for sending CSNPs in an area at a specified
level. A router may be elected as a DIS in both Level-1 and Level-2
areas. Therefore, you can set different intervals at which the DIS
sends CSNPs in Level-1 and Level-2 areas. 


Precautions


The IS-IS route convergence speed depends on the LSDB synchronization
speed. Therefore, reducing the interval for sending CSNPs can speed
up LSDB synchronization and IS-IS route convergence. If the interval
is set too small, however, the DIS will send CSNPs frequently. This
causes high CPU, memory, and network bandwidth usage and affects services. 


 NOTE: 
If the isis circuit-type command is run to emulate the interface as a P2P interface, the isis timer csnp command becomes invalid on the interface;
after the undo isis circuit-type command is run
to restore the broadcast interface, the interval for sending CSNPs
is restored to the default setting. 







Example


# Set the interval for sending Level-2 CSNPs to 15
seconds on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis timer csnp 15 level-2



# Set the interval for sending Level-2 CSNPs to 15 seconds on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis timer csnp 15 level-2









isis timer hello




Function


The isis timer hello command sets the
interval for sending Hello packets on an IS-IS interface.


The undo isis timer hello command restores the default setting.


By default, the interval for sending Hello packets 10 seconds
on an interface.





Format


isis timer hello hello-interval [ level-1 | level-2 ] [ conservative ]


undo isis timer
hello [ hello-interval ] [ level-1 | level-2 ] [ conservative ]





Parameters





Parameter
Description
Value




hello-interval
Specifies the interval for sending Hello packets.
The value is an integer that ranges from 3 to 255,
in seconds. The default value is 10 seconds.





level-1
Indicates the interval for sending Level-1 Hello packets.
If the level is not specified, the interval for sending Level-1 and
Level-2 Hello packets is set by default.


-





level-2
Indicates the interval for sending Level-2 Hello packets.
If the level is not specified, the interval for sending Level-1 and
Level-2 Hello packets is set by default.


 NOTE: 
Parameters level-1 and level-2 are
configured only on a broadcast interface that is enabled with IS-IS. 


Level-1 and Level-2 Hello packets are sent separately and their
intervals must be set respectively. There is only one Hello packet
on a point-to-point link. Therefore, level-1 and level-2 parameters
are not used.




-





conservative
Indicates the conservative mode of the dead timer. If
the conservative mode is configured, the value configured for the
dead timer takes effect even when the value is less than 10s.
-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
IS-IS maintains neighbor relationships
between neighbors by sending and receiving Hello packets. If the local
device does not receive Hello packets from its neighbor within a specified
period, the device considers the neighbor Down.


Prerequisites


IS-IS has been enabled on the interface using the isis enable command.

Precautions
The shorter the interval,
the more system resources used to send Hello packets. The interval
should therefore be set according to the actual conditions. 


If a broadcast interface is emulated as a P2P interface through the isis circuit-type command or then restored to the broadcast interface through
the undo
isis circuit-type command, the interval for sending
IS-IS Hello packets is restored to the default value. 





Example


# Set the interval for sending Level-2 Hello packets
to 20 seconds on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis timer hello 20 level-2



# Set the interval for sending Level-2 Hello packets to 20 seconds
on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis timer hello 20 level-2









isis timer holding-multiplier




Function


The isis timer holding-multiplier command
sets the multiplier of the interval for sending Hello packets to change
the holdtime of IS-IS neighbor relationship.


The undo
isis timer holding-multiplier command restores the default
setting.


By default, the multiplier of the interval for sending
Hello packets is 3, that is, the neighbor holdtime is three times
the interval for sending Hello packets.





Format


isis timer holding-multiplier number [ level-1 | level-2 ]


undo isis timer
holding-multiplier [ number ] [ level-1 | level-2 ]





Parameters





Parameter
Description
Value




number
Indicates that the neighbor holdtime is a multiplier
of the interval for sending Hello packets.
The value is an integer that ranges from 3 to 1000.
The default value is 3.





level-1
Indicates the holdtime of Level-1 neighbors. If the
level is not specified, the holdtime is set for both Level-1 and Level-2
neighbors.
-





level-2
Indicates the holdtime of Level-2 neighbors. If the
level is not specified, the holdtime is set for both Level-1 and Level-2
neighbors.
 NOTE: 
Parameters level-1 and level-2 are configured only on a
broadcast interface that is enabled with IS-IS. 


Level-1 and
Level-2 Hello packets are sent separately and their intervals must
be set respectively. There is only one Hello packet on a point-to-point
link. Therefore, level-1 and level-2 parameters are not used.




-









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


Devices at both ends of a
link establish a neighbor relationship by sending Hello packets to
each other. After the neighbor relationship is established, both devices
need to send Hello packets at a specified interval to maintain the
neighbor relationship. If a device does not receive any Hello packet
from its neighbor within a specified period of time, the device considers
the neighbor to be Down. The specified time period is known as the
neighbor holdtime. 


For example, run the isis timer hello command on a local device to set the interval for sending Hello
packets to 20s. Then, run the isis timer holding-multiplier 4 command. The holdtime is 80s (four times the interval for sending
Hello packets). If the interval for sending Hello packets is changed
using the isis timer hello 20 command, the holdtime will be
changed accordingly. 


Prerequisites


IS-IS has been
enabled on the interface using the isis enable command.


Precautions


If the number value
is set too large, the local device needs to wait a long time before
detecting that the remote device has gone Down. This slows down IS-IS
route convergence. If the value of number is set
too small, the neighbor relationship will alternate between Up and Down when some Hello packets are lost due to transmission
delays and errors on the network. This causes route flapping on the
IS-IS network. Therefore, exercise caution when setting the value
of number. Set the same interval for sending Hello
packets and the same neighbor holdtime for all devices on the IS-IS
network is recommended. This is to ensure that all devices detect
link failures at the same time and guarantee timely IS-IS route convergence. 


If a broadcast interface is emulated as a P2P interface through
the isis
circuit-type command or then restored to the broadcast
interface through the undo isis circuit-type command, the number
of Hello packets that IS-IS does not receive from a neighbor before
the neighbor is declared Down is restored to the default value. 





Example


# Set the number of Level-2 Hello packets that IS-IS
does not receive from a neighbor before the neighbor is declared Down
to 6 on VLANIF100.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis timer holding-multiplier 6 level-2



# Set the number of Level-2 Hello packets that IS-IS does not receive
from a neighbor before the neighbor is declared Down to 6 on GE1/0/1.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis timer holding-multiplier 6 level-2









isis timer lsp-retransmit




Function


The isis timer lsp-retransmit command
sets the interval for retransmitting LSPs over a P2P link.


The undo isis timer lsp-retransmit command restores the default
value.


By default, the interval for retransmitting LSPs over
a P2P link is 5 seconds.





Format


isis timer lsp-retransmit retransmit-interval


undo isis timer lsp-retransmit





Parameters





Parameter
Description
Value




retransmit-interval
Specifies the interval for retransmitting LSPs.
The value is an integer that ranges from 1 to 300.









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


On a point-to-point network,
devices at both ends of a link synchronize LSDBs with each other by
flooding LSPs. The device at one end of the link sends an LSP. If
the device at the other end receives this LSP, it replies with a PSNP.
If the device that has sent an LSP does not receive a PSNP from the
other end in a period of time, the device will retransmit the LSP. 


The isis timer lsp-retransmit command is used
to set an interval for retransmitting LSPs. Only the devices on a
point-to-point network send PSNPs. Therefore, the isis timer
lsp-retransmit command will take effect only when it is
run on point-to-point interfaces. 


Precautions


After the isis timer lsp-retransmit command is
run on a device, the device will wait retransmit-interval after having sent an LSP. If the device receives a PSNP from the
other end, the device will not retransmit the LSP. Otherwise, the
device will retransmit the LSP. 


If the value of retransmit-interval is set too small, an LSP will be retransmitted even though it is
not necessary, causing high CPU, memory, and network bandwidth usage.
 NOTE: 
If a broadcast interface is emulated as a P2P interface
through the isis circuit-type command or restored a P2P interface
to the broadcast interface through the undo isis circuit-type command, the interval for retransmitting LSP packets on a
P2P link is restored to the default value. 









Example


# Set the interval for retransmitting LSPs on VLANIF100 to 10 seconds.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00


[HUAWEI-isis-1] quit


[HUAWEI] interface vlanif 100


[HUAWEI-Vlanif100] isis enable 1


[HUAWEI-Vlanif100] isis circuit-type p2p


[HUAWEI-Vlanif100] isis timer lsp-retransmit 10


# Set the interval for retransmitting LSPs on GE1/0/1 to 10 seconds.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis circuit-type p2p
[HUAWEI-GigabitEthernet1/0/1] isis timer lsp-retransmit 10









isis timer lsp-throttle




Function


The isis timer lsp-throttle command
sets the minimum interval for sending LSPs on an IS-IS interface and
the maximum number of LSPs sent within the interval.


The undo isis timer lsp-throttle command restores the default
setting.


By default, the minimum interval for sending LSPs on
an IS-IS interface is 50 milliseconds and the maximum number of LSPs
sent within the interval is 10.





Format


isis timer lsp-throttle throttle-interval [ count count ]


undo isis timer lsp-throttle





Parameters





Parameter
Description
Value




throttle-interval
Specifies the minimum interval for sending LSPs.
The value is an integer that ranges from 1 to 10000,
in milliseconds.





count count
Specifies the maximum number of LSPs that are sent within
the interval specified by throttle-interval.
The value is an integer that ranges from 1 to 1000.









Views


Interface view





Default Level


2: Configuration level





Usage Guidelines


The value specified by throttle-interval is the interval between two consecutive LSPs and is also the interval
for sending multiple fragments of a CSNP. 


Before running this
command on an interface, run the isis enable command
on the interface to enable IS-IS.





Example


# Set the interval for retransmitting LSPs on VLANIF100 to 500 ms.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] isis enable 1
[HUAWEI-Vlanif100] isis timer lsp-throttle 500



# Set the interval for retransmitting LSPs on GE1/0/1 to 500 ms.


<HUAWEI> system-view
[HUAWEI] isis
[HUAWEI-isis-1] network-entity 01.0000.0000.0001.00
[HUAWEI-isis-1] quit
[HUAWEI] interface gigabitethernet 1/0/1
[HUAWEI-GigabitEthernet1/0/1] undo portswitch
[HUAWEI-GigabitEthernet1/0/1] isis enable 1
[HUAWEI-GigabitEthernet1/0/1] isis timer lsp-throttle 500









is-level




Function


The is-level command sets the level
of an IS-IS switch.


The undo is-level command restores the default
setting.


By default, the level of an IS-IS switch is Level-1-2.





Format


is-level { level-1 | level-1-2 | level-2 }


undo is-level





Parameters





Parameter
Description
Value




level-1
Indicates that the level of the switch is Level-1. The switch calculates only intra-area
routes and maintains the Level-1 LSDB.
-





level-1-2
Indicates that the level of the switch is Level-1-2. The switch calculates Level-1 and
Level-2 routes and maintains Level-1 and Level-2 LSDBs.
-





level-2
Indicates that the level of the switch is Level-2. The switch calculates only Level-2
routes, and maintains the Level-2 LSDB.
-









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario 


To support a network with
a large number of routes, IS-IS uses a two-level structure in an IS-IS
routing domain. IS-IS switchs are classified into the following levels:
    

  • Level-1 switch:
A Level-1 switch manages
intra-area routing. It establishes neighbor relationships with only
Level-1 and Level-1-2 switchs in the same area. Level-1 switchs can be connected to other areas through Level-1-2 switchs only.
    • 

  • Level-2 switch:
A Level-2 switch manages
intra-area routing. It establishes neighbor relationships with Level-2 switchs in the same area and
Level-1-2 switchs in
other areas only. All Level-2 switchs form the backbone network of the routing domain. They
are responsible for communications between areas. The Level-2 switchs in the routing domain
must be reachable, and no switch of other levels is deployed between every two Level-2 switchs. 
    • 

  • Level-1-2 switch: A Level-1-2 switch can establish Level-1 neighbor relationships with Level-1 switchs and Level-1-2 switchs in the same area. It
can also establish Level-2 neighbor relationships with Level-2 switchs and Level-1-2 switchs in other areas. 
    • 





In most cases, Level-1 switchs are located within an
area, Level-2 switchs are located between areas, and Level-1-2 switchs are located between
Level-1 switchs and
Level-2 switchs. 


The level of an IS-IS switch and of an interface determine the level of a neighbor
relationship. By default, neighbor relationships between two Level-1-2 switchs are Level-1 and Level-2.
To establish a Level-1 or Level-2 neighbor relationship, run the isis circuit-level command to modify the level of interfaces.  


If only
one area exists, setting the level of switchs to Level-1 or Level-2
is recommended to prevent devices from maintaining two LSDBs that
are the same. On an IP network, setting the level of all switchs to Level-2 for future
extension is recommended.  


Precautions 


If the
levels of IS-IS switchs are changed during network operation, the IS-IS process will be
restarted and IS-IS neighbor relationships will be disconnected. Setting
the levels of switchs when configuring IS-IS is recommended.  


If the Level-1 and
Level-2 is not specified, the switch works at Level-1-2. That is, the switch calculates Level-1 and
Level-2 routes and maintains Level-1 and Level-2 LSDBs simultaneously. 





Example


# Set the level of the current switch to Level-1.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] is-level level-1







Related Topics







is-name




Function


The is-name command enables the capability
of identifying the host name in an LSP and configures the dynamic
host name for the IS-IS system of the local switch. The dynamic hostname
is advertised in an LSP packet.


The undo is-name command deletes the dynamic host name configured for the IS-IS system
of the local switch.


By default, the IS-IS system of the local switch has no dynamic host name.





Format


is-name symbolic-name


undo
is-name [ symbolic-name ]





Parameters





Parameter
Description
Value




symbolic-name
Specifies a dynamic host name.
The value is a string of 1 to 64 case-sensitive characters
without spaces.When double quotation marks are used around the string,
spaces are allowed in the string.









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


In most cases, to check information about IS-IS neighbors
and LSDBs on an IS-IS switch, you need to use a system ID of a 12-digit hexadecimal number, for
example, aaaa.eeee.1234. This representation, however, is complicated
and not easy to use. The dynamic host name mapping mechanism is introduced
to facilitate maintenance and management of IS-IS networks. The is-name command is used to configure a simple host name
for a local switch and
enables the switch to
advertise it in an LSP. 


After the configuration is completed,
you can run the display isis name-table command to check
the configured hostname.  





Example


# Configure host name RUTA for the local IS-IS
system.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] is-name RUTA









is-name map




Function


The is-name map command enables the
local switch to identify
the host name in LSPs, and sets a static host name for a remote IS-IS
system on the local switch.


The undo is-name map command disables
the local switch from
identifying the host name in LSPs, and deletes the static host name
for a remote IS-IS system set by the local switch.


By default, the
local device does not have the static host name of a remote IS-IS
system. 





Format


is-name map system-id symbolic-name


undo is-name map system-id [ symbolic-name ]





Parameters





Parameter
Description
Value




system-id
Specifies the ID of the remote mapped IS-IS system or
pseudonode ID.
The format is XXXX.XXXX.XXXX[.XX].





symbolic-name
Specifies the static host name of the remote mapped
IS-IS system.
The value is a string of 1 to 64 characters without
spaces. It is case sensitive.When double quotation marks are used
around the string, spaces are allowed in the string.









Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario
When checking information about IS-IS
neighbors and LSDBs on the switch that runs IS-IS, each switch in the IS-IS routing
domain is represented by a system ID with a 12-bit hexadecimal number,
for example, aaaa.eeee.1234. This representation is complicated and
not easy to use. To manage and maintain IS-IS networks conveniently,
IS-IS uses the dynamic host name exchange mechanism. The is-name map command can configure a host name for the remote switch and does not advertise
the host name through an LSP. 


After running the is-name
map command to map the remote switch to the host name, you
can find that the system ID of the remote switch is replaced by the host
name configured using the display isis name-table command. 

Precautions  
This configuration is
static configuration and takes effect only on the local device. Therefore,
the configured host name symbolic-name is not advertised
through an LSP. If dynamic host name mapping is configured on an IS-IS
device, dynamic host name mapping takes precedence over static host
name mapping.





Example


# Configure static host name mapping for the IS-IS
system on the remote switch as 0000.0000.0041.


<HUAWEI> system-view


[HUAWEI] isis


[HUAWEI-isis-1] is-name map 0000.0000.0041 RUTB









local-mt enable (IS-IS)




Function


The local-mt enable command enables
IS-IS local MT.


The undo local-mt enable command
disables IS-IS local MT.


By default, IS-IS local MT is not enabled.





Format


local-mt enable


undo
local-mt enable





Parameters


None





Views


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


This command can be configured only if IS-IS TE is enabled
and the IS-IS cost type is wide, wide-compatible, or compatible.





Example


# Enable IS-IS local MT.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] cost-style compatible


[HUAWEI-isis-1] traffic-eng


[HUAWEI-isis-1] local-mt enable









local-mt filter-policy (IS-IS)




Function


The local-mt filter-policy command
configures the policy of IS-IS local Multi Topology (MT).


The undo local-mt filter-policy command cancels the policy
of IS-IS local MT.


By default, the policy of local MT is not
configured.





Format


local-mt filter-policy { acl { acl-number | acl-name } | ip-prefix ip-prefix-name }


undo local-mt filter-policy





Parameters





Parameter
Description
Value




acl-number
Specifies the number of the basic ACL.
The value is an integer ranging from 2000 to 2999.





acl-name acl-name
Specifies the name of a Named ACL. It is case-sensitive.
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 the 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


IS-IS view





Default Level


2: Configuration level





Usage Guidelines


Usage Scenario


After the policy of local
MT is configured, only the routes to the multicast source addresses
are added to the Multicast IGP (MIGP) routing table. This saves CPU
and memory resources.


For an ACL, when the rule command is used to configure a filtering rule, the filtering rule
is effective only with the source address range that is specified
by the source parameter and with the time
period that is specified by the time-range parameter.


Precautions


Creating an ACL before
it is referenced is recommended. If a nonexistent ACL
is referenced using the command, all IS-IS routes are added to the
MIGP routing table.


Creating an IP prefix list before it is
referenced is recommended. By default, nonexistent IP prefix lists
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 is referenced using
the current command, all IS-IS routes are added to the MIGP routing
table.





Example


# Configure the policy of IS-IS local MT.


<HUAWEI> system-view


[HUAWEI] isis 1


[HUAWEI-isis-1] local-mt filter-policy acl 2000









log-peer-change




Function


The log-peer-change command enables
the output of IS-IS adjacency changes. 


The undo log-peer-change command disables the output of IS-IS adjacency changes. 


By
default, the output of IS-IS adjacency changes is disabled.





Format


log-peer-change [ topology ]


undo l