No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

AR500, AR510, and AR530 V200R007 Commands Reference

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.
Rate and give feedback:
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).
BFD Configuration Commands

BFD Configuration Commands

NOTE:

The AR500 series does not support BFD.

bfd

Function

The bfd command enables the global Bidirectional Forwarding Detection (BFD) function and displays the BFD view.

The undo bfd command disables global BFD.

By default, global BFD is disabled.

Format

bfd

undo bfd

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To fast detect link faults, run the bfd command in the system view to enable global BFD.

Precautions

After the undo bfd command is executed, all the BFD functions are disabled. If a BFD session is configured, all the BFD sessions configuration will be deleted.

Example

# Enable the global BFD function.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd]

bfd bind peer-ip

Function

The bfd bind peer-ip command creates a BFD session, specifies the peer IP address, and displays the BFD session view.

The undo bfd session-name command deletes a specified BFD session and cancels the peer IP address.

By default, BFD binding is not created.

Format

bfd session-name bind peer-ip ip-address [ vpn-instance vpn-name ] [ interface interface-type interface-number ] [ source-ip ip-address ]

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session.

The value is a string of 1 to 15 case-sensitive characters without spaces.
NOTE:

When double quotation marks are used around the string, spaces are allowed in the string.

peer-ip ip-address

Specifies the peer IP address bound to the BFD session.

-

vpn-instance vpn-name

Specifies the name of a Virtual Private Network (VPN) instance that is bound to a BFD session.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

If no VPN instance is specified, the peer IP address is considered as the public network address. If this parameter is specified, the VPN instance must have been created by using the ip vpn-instance command.

interface interface-type interface-number

Specifies the type and number of the interface bound to the BFD session.

  • interface-type specifies the type of the interface.

  • interface-number specifies the number of the interface.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets.

  • During BFD session negotiation, if the source IP address is not specified, the system searches the local routing table for an outbound interface from which the peer IP address is reachable. The IP address of this outbound interface is used as the source IP address of the BFD packets sent by the local end.

  • When a BFD session is detecting links, if this parameter is not specified, the system uses a fixed source IP address in BFD packets.

Generally, you do not need to set this parameter. When BFD is used with the Unicast Reverse Path Forwarding (URPF) function, you must manually configure the source IP address in BFD packets because the UPRF function checks the source IP address in received packets.

NOTE:

For details about URPF, see URPF Configuration in the Huawei AR Series IOT Gateway Configuration Guide - Security Configuration.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To fast detect and monitor links, create BFD sessions.

To create a BFD binding, pay attention to the following points:

  • If only the peer IP address is specified, BFD is configured to detect the multi-hop link.

  • If the peer IP address and local interface are specified, BFD is configured to detect the single-hop link, that is, a specific route with this interface as the outbound interface and with the peer IP address as the next-hop address.

  • If both the peer IP address and the VPN instance are specified, BFD is configured to detect the multi-hop link in the VPN instance.

  • The single-hop link in the VPN instance is detected if both the peer IP address, VPN instance, and local interface are specified.

Prerequisites

Global BFD has been enabled by using the bfd command in the system view.

Follow-up Procedure

  • Run the discriminator command to set the local and remote discriminators for the current BFD session.

Precautions

  • When creating a single-hop BFD session, bind the single-hop BFD session to the peer IP address and the local address. You only need to bind a multi-hop BFD session to the peer IP address.

  • When the BFD configuration items are created, the system checks only the format of the IP address. The BFD session cannot be established if an incorrect peer IP address or source IP address is bound.

NOTE:

After configuring a BFD session, run the commit command to commit the configuration. Otherwise, the configuration cannot take effect.

Example

# Create a BFD session named atoc to detect the multi-hop link to the peer IP address 10.10.20.2.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] quit
[Huawei] bfd atoc bind peer-ip 10.10.20.2

bfd bind peer-ip default-ip

Function

The bfd bind peer-ip default-ip command creates a BFD binding for detecting the physical status of a link.

The undo bfd session-name command deletes a specified BFD session and the created BFD binding.

By default, no BFD binding for monitoring physical status of a link is configured.

Format

bfd session-name bind peer-ip default-ip interface interface-type interface-number [ source-ip ip-address ]

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the session name of BFD.

The value is a string of 1 to 15 characters without spaces.

NOTE:

When quotation marks are used around the string, spaces are allowed in the string.

peer-ip default-ip

Indicates the default multicast IP address that is bound to a BFD session.

By default, BFD uses the multicast IP address 224.0.0.184. You can set the multicast IP address by running the default-ip-address command.

interface-type interface-number

Specifies the type and number of the interface bound to a BFD session.

  • interface-type specifies the interface type.

  • interface-number specifies the interface number.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets. If the source IP address is not specified, the system searches the local routing table for an outbound interface from which the peer IP address can be reached. The IP address of this outbound interface is used as the source IP address of BFD packets sent by the local end. Generally, this parameter is not required.

When BFD is used with the Unicast Reverse Path Forwarding (URPF) function, you must manually configure the source IP address in BFD packets because the UPRF function checks the source IP address in received packets.

NOTE:

For details about URPF, see URPF Configuration in the Huawei AR Series IOT Gateway Configuration Guide - Security Configuration.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If source-ip is specified, the URPF-enabled device does not incorrectly discard BFD packets. Ensure that the source IP address is correct. The system only checks whether the source IP address is valid (for example, it cannot be a multicast or broadcast address) without checking correctness.

Prerequisites

BFD has been enabled globally using the bfd command in the system view.

Precautions

If the IP address of an outbound interface is changed after a BFD session is configured, the source IP address of BFD packets is not updated.

NOTE:

After the bfd bind peer-ip default-ip command is executed, run the commit command to commit the configuration to make the configuration take effect.

Example

# Configure a BFD session named test on GE 1/0/0.1 to which a default multicast address is bound, to detect the one-hop link on GE1/0/0.1.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] quit
[Huawei] bfd test bind peer-ip default-ip interface gigabitethernet 1/0/0.1
[Huawei-bfd-session-test]

bfd bind peer-ip source-ip auto

Function

The bfd bind peer-ip source-ip auto command creates a static BFD session with automatically negotiated discriminators.

The undo bfd session-name command deletes a specified BFD session.

By default, no static BFD session with automatically negotiated discriminators is established.

Format

bfd session-name bind peer-ip ip-address [ vpn-instance vpn-name ] [ interface interface-type interface-number ] source-ip ip-address auto

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session.

The value is a string of 1 to 15 case-sensitive characters without spaces.

NOTE:

When quotation marks are used around the string, spaces are allowed in the string.

peer-ip ip-address

Specifies the peer IP address bound to the BFD session.

-

vpn-instance vpn-name

Specifies the name of a Virtual Private Network (VPN) instance that is bound to a BFD session.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

If no VPN instance is specified, the peer IP address is considered as the public network address. If this parameter is specified, the VPN instance must have been created by using the ip vpn-instance command.

interface-type interface-number

Specifies the type and number of the interface bound to the BFD session.

  • interface-type specifies the type of the interface.

  • interface-number specifies the number of the interface.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets, that is, IP address of the outbound interface.

-

auto

Enables automatic negotiation of local and remote discriminators.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To fast detect and monitor links, when the peer device uses dynamic BFD and the local device wants to communicate with the peer device and detect static routes, run the bfd bind peer-ip source-ip auto command to create a BFD session with automatically negotiated discriminators.

When creating a static BFD session with automatically negotiated discriminators, pay attention to the following points:

  • If only the peer IP address is specified, BFD is configured to detect the multi-hop link.

  • If the peer IP address and local interface are specified, BFD is configured to detect the single-hop link, that is, a specific route with this interface as the outbound interface and with the peer IP address as the next-hop address.

  • The source IP address prevents BFD packets from being discarded incorrectly when the URPF function is enabled. Ensure that the source IP address is correct. The system only checks whether the source IP address is valid (for example, it cannot be a multicast or broadcast address) without checking correctness.

  • If both the peer IP address and the VPN instance are specified, BFD is configured to detect the multi-hop link in the VPN instance.

  • If the peer IP address, VPN instance, and local interface are specified, BFD is configured to detect the single-hop link in the VPN instance.

Prerequisites

Global BFD has been enabled by using the bfd command in the system view.

Precautions

  • When creating a BFD session, bind the BFD session to the peer IP address and the local address.

  • When the BFD configuration items are created, the system checks only the format of the IP address. The BFD session cannot be established if an incorrect peer IP address or source IP address is bound.

Example

# Create a static BFD session with automatically negotiated discriminators.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] quit
[Huawei] bfd atob bind peer-ip 10.1.1.2 interface gigabitethernet 0/0/1 source-ip 10.1.1.1 auto
Related Topics

bfd one-arm-echo

Function

The bfd one-arm-echo command configures the BFD echo function.

The undo bfd command deletes a specified BFD session and cancels the binding.

By default, the BFD echo function is not configured.

Format

bfd session-name bind peer-ip peer-ip interface interface-type interface-number [ source-ip ip-address ] one-arm-echo

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session supporting the BFD echo function.

The value is a string of 1 to 15 case-insensitive characters without spaces.

NOTE:

When quotation marks are used around the string, spaces are allowed in the string.

peer-ip peer-ip

Specifies the peer IP address bound to the BFD session.

The value is in dotted decimal notation.

interface-type interface-number

Specifies the type and number of the interface bound to a BFD session.

  • interface-type specifies the interface type.

  • interface-number specifies the interface number.

-

source-ip ip-address

Indicates the source IP address carried in BFD packets.

-

one-arm-echo

Indicates a BFD session supporting the BFD echo function.

-

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

Among two directly connected devices, one device supports BFD, whereas the other device does not support BFD. To rapidly detect forwarding failures between the two devices, configure a BFD session supporting the BFD echo function on the BFD-supporting device. The BFD-supporting device sends an Echo Request packet to the remote device. The remote device sends the Echo Request packet back along the same path to detect the forwarding link connectivity.

When you configure a BFD session supporting the BFD echo function:

  • If source-ip is specified, the URPF-enabled device does not incorrectly discard BFD packets. Ensure that the source IP address is correct. The system only checks whether the source IP address is valid (for example, it cannot be a multicast or broadcast address) without checking correctness.

Prerequisites

Global BFD has been enabled using the bfd command in the system view.

Precautions

The difference between a BFD session supporting the BFD echo function and a common BFD session is as follows:

  • When configuring a BFD session supporting the BFD echo function, you can only specify local discr-value in the discriminator command.

  • You can only run the min-echo-rx-interval command to change the interval for receiving BFD packets.

NOTE:
  • If the IP address of an outbound interface is changed after a BFD session is configured, the source IP address of BFD packets is not updated.

  • The BFD echo function is only applicable to single-hop BFD sessions.

  • After the bfd one-arm-echo command is executed, run the commit command to commit the configuration to make the configuration take effect.

Example

# Configure a BFD session test supporting the BFD echo function.

bfd session-name

Function

The bfd command displays the view of a specified BFD session.

The undo bfd command deletes a specified BFD session.

Format

bfd session-name

undo bfd session-name

Parameters

Parameter

Description

Value

session-name

Specifies the name of a BFD session.

The value is a string of 1 to 15 characters without spaces.

NOTE:

When quotation marks are used around the string, spaces are allowed in the string.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To configure the created BFD session, run the bfd session-name command to enter the specified BFD session view.

Prerequisites

A BFD session has been created by using either of the following commands:

Precautions

The bfd session-name command displays the BFD session view regardless of whether the BFD session status is Up.

Example

# Enter the view of the BFD session session.

<Huawei> system-view
[Huawei] bfd session
[Huawei-bfd-session-session]

bfd session nonexistent-config-check

Function

The bfd session nonexistent-config-check enable command enables the device to check whether the associated BFD session is deleted.

The undo bfd session nonexistent-config-check disable command enables the device to check whether the associated BFD session is deleted.

The bfd session nonexistent-config-check disable command disables the device from checking whether the associated BFD session is deleted.

By default, the device is enabled to check whether the associated BFD session is deleted.

Format

bfd session nonexistent-config-check enable

undo bfd session nonexistent-config-check disable

bfd session nonexistent-config-check disable

Parameters

None

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

After static BFD for IPv4 static routes and association between VRRP and BFD are configured, deleting the BFD session may cause the association function to become ineffective. You can run the bfd session nonexistent-config-check enable command to enable the device to check whether the associated BFD session is deleted. When the associated BFD session is being deleted, the system displays a message indicating that the BFD session cannot be deleted. This function prevents the associated BFD session from being deleted incorrectly.

Example

# Disable the device from checking whether the associated BFD session is deleted.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] bfd session nonexistent-config-check disable

bfd-group

Function

The bfd-group command creates a BFD group and displays the BFD group view.

The undo bfd-group command deletes a BFD group.

By default, no BFD group is created.

Format

bfd-group group-name

undo bfd-group group-name

Parameters

Parameter Description Value
group-name Specifies the name of a BFD group. The value is a string of 1 to 15 case-sensitive characters without spaces.
NOTE:

If the character string is quoted by quotation marks, the character string can contain spaces.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

If multiple BFD sessions need to be monitored, you can create a BFD group. Then the device only need to monitor the BFD group.

Example

# Create a BFD group.

<Huawei> system-view
[Huawei] bfd-group group
[Huawei-bfd-group-group]

commit

Function

The commit command commits the BFD session configuration.

Format

commit

Parameters

None

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To make the modification on a BFD session take effect, you must run the commit command.

Precautions

  • To establish a BFD session, the interface bound to the BFD session must be Up and there is a reachable route to the peer IP address.

  • If conditions for BFD session setup are not met, the system keeps the configuration entries of the BFD session. The BFD session, however, cannot be established when you use the commit command.

  • The system periodically scans BFD configuration entries that are committed but not used to establish sessions. If conditions are met, a session is established.

  • The number of BFD sessions that can be established in the system is limited. When the number of established BFD sessions reaches the upper limit and you use the commit command to commit the configurations of a new BFD session, the system generates a log indicating that the BFD session cannot be established and sends traps.

  • After running the bfd bind peer-ip source-ip auto command to create configurations for a static BFD session with automatically negotiated discriminators, you do not need to run the commit command to commit the configurations. BFD sessions can be automatically established, and relevant configurations are labeled with the commit tags. To modify session parameters such as process-interface-status, min-rx-interval, min-tx-interval, detect-multiplier, tos-exp, wtr, and description, you can directly run the corresponding commands without running the commit command, and the modification takes effect immediately. The commit command can still be used but does not take effect.

Example

# Commit the BFD session configuration.

<Huawei> system-view
[Huawei] bfd test bind peer-ip 10.1.1.1 interface gigabitethernet 1/0/0
[Huawei-bfd-session-test] discriminator local 22
[Huawei-bfd-session-test] discriminator remote 33
[Huawei-bfd-session-test] commit
Related Topics

dampening timer-interval

Function

The dampening timer-interval command configures BFD session flapping suppression timers.

The undo dampening timer-interval command restores the default configuration.

BFD session flapping suppression timers start by default.

The default initial, secondary, and maximum BFD session flapping suppression timer values are 2000 ms, 5000 ms, and 12000 ms, respectively.

Format

dampening timer-interval maximum maximum-milliseconds initial initial-milliseconds secondary secondary-milliseconds

undo dampening timer-interval [ maximum maximum-milliseconds initial initial-milliseconds secondary secondary-milliseconds ]

Parameters

Parameter Description Value
maximum maximum-milliseconds Specifies a maximum BFD session flapping suppression timer value. The value is an integer ranging from 1 to 3600000, in milliseconds. The default value is 12000.
initial initial-milliseconds Specifies an initial BFD session flapping suppression timer value. The value is an integer ranging from 1 to 3600000, in milliseconds. The default value is 2000.
secondary secondary-milliseconds Specifies a secondary BFD session flapping suppression timer value. The value is an integer ranging from 1 to 3600000, in milliseconds. The default value is 5000.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If BFD detects link Down, services are switched. A penalty mechanism is provided to delay BFD session negotiation and prevent frequent service switchovers, protecting link resources and reducing link resource consumption.

To configure BFD session flapping suppression timers, run the dampening timer-interval command.

Prerequisites

BFD has been globally enabled using the bfd command in the system view.

Configuration Impact

After the dampening timer-interval command is run:

  1. When a BFD session flaps for the first time, the initial BFD session flapping suppression timer starts. If the BFD session flaps again before the initial BFD session flapping suppression timer expires, BFD session renegotiation is triggered after the initial BFD session flapping suppression timer expires.
  2. After the initial BFD session flapping suppression timer ends, the secondary BFD session flapping suppression timer starts. If the BFD session flaps before the secondary BFD session flapping suppression timer expires, BFD session renegotiation is triggered after the secondary BFD session flapping suppression timer expires. After that, the timer value is secondary-milliseconds x 2(n-1), where n is the number of times that the secondary BFD session flapping suppression timer starts.
  3. After the timer value of secondary-milliseconds x 2(n-1) is greater than or equal to the value specified by maximum-milliseconds, the BFD session uses the value specified by maximum-milliseconds as a flapping delay three consecutive times. After that, the BFD session flapping delay is recalculated based on Step 1.

Precautions

The configured maximum BFD session flapping suppression timer value must be greater than the configured initial or secondary BFD session flapping suppression timer value. Otherwise, the configuration fails.

Do not configure both the dampening timer-interval and wtr commands. Otherwise, the BFD session recovery period becomes long.

Example

# Set a maximum, initial, and secondary BFD session flapping suppression timer values to 20000 ms, 1000 ms, and 3000 ms, respectively.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] dampening timer-interval maximum 20000 initial 1000 secondary 3000

default-ip-address

Function

The default-ip-address command configures the default multicast IP address used by all BFD sessions.

The undo default-ip-address command restores the default multicast IP address.

By default, BFD uses the multicast IP address 224.0.0.184.

Format

default-ip-address ip-address

undo default-ip-address

Parameters

Parameter

Description

Value

ip-address

Specifies the default multicast IP address.

The value ranges from 224.0.0.107 to 224.0.0.250.

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When using BFD to detect the physical status of a link, you may not specify the peer IP address. In certain situations, the peer such as the member link of the Eth-Trunk is not assigned an IP address. In this case, you need to bind a BFD session to a multicast IP address and send BFD control packets to the multicast IP address.

You must change the default multicast IP address in the following situations:

  • On the network, other protocols use the multicast IP address.

  • If multiple BFD sessions exist on a path, for example, Layer 3 interfaces are connected through Layer 2 switching devices that support BFD, configure different default multicast IP addresses for the devices where different BFD sessions are established. In this manner, BFD packets can be correctly forwarded.

Prerequisites

BFD has been enabled globally using the bfd command in the system view.

Precautions

If a BFD session that is bound to the default multicast IP address is configured, you cannot change the default multicast IP address.

Example

# Set the default multicast IP address to 224.0.0.150.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] default-ip-address 224.0.0.150

delay-up

Function

The delay-up command sets a delay before a BFD session becomes Up.

The undo delay-up command cancels a delay before a BFD session becomes Up.

By default, a delay is not set before a BFD session becomes Up.

Format

delay-up time

undo delay-up

Parameters

Parameter

Description

Value

time

Specifies the delay before a BFD session becomes Up.

The value is an integer ranging from 1 to 600, in seconds. The default value is 0, indicating that a BFD session immediately becomes Up.

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If the Router restarts, services on the active link need to be switched to the standby link. After the Router restarts, services need to be switched back to the active link. In practice, some devices determine whether to switch traffic based on the BFD session status. Because the routing protocol becomes Up after the interface becomes Up, routes may be not found when services are switched back, causing traffic loss. Therefore, the interval between the time when the routing protocol becomes Up and the time when the interface becomes Up must be eliminated. To solve this problem, run the delay-up command.

Prerequisites

Global BFD has been enabled by using the bfd command in the system view.

Precautions

The delay-up command affects BFD sessions whose configurations are not committed. When a created BFD session becomes Down, the session becomes Up after the delay.

Example

# Set the delay before a BFD session becomes Up to 120s.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] delay-up 120
Related Topics

description (BFD session view)

Function

The description command configures the description of a BFD session.

The undo description command deletes the description of a BFD session.

By default, the description of a BFD session is empty.

Format

description description

undo description

Parameters

Parameter

Description

Value

description

Specifies the description of a BFD session.

The value is a string of 1 to 51 case-sensitive characters with spaces.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

In practice, multiple BFD sessions need to be configured. To differentiate BFD sessions, run the description command to configure a description for a BFD session. A meaningful description is recommended.

Configuration Impact

It is difficult to identify a BFD session that is not configured or whose description is deleted.

Precautions

If you run the description command in the same BFD session view multiple times, only the latest configuration takes effect.

The description command takes effect only for statically configured BFD sessions but does not take effect for dynamic BFD sessions or BFD sessions with automatically negotiated discriminators.

Example

# Set the description of the BFD session named atoc.

<Huawei> system-view
[Huawei] bfd atoc
[Huawei-bfd-session-atoc] description RouterA_to_RouterC

detect-multiplier

Function

The detect-multiplier command sets the local detection multiplier.

The undo detect-multiplier command restores the default local detection multiplier.

By default, the local detection multiplier is 3.

Format

detect-multiplier multiplier

undo detect-multiplier

Parameters

Parameter

Description

Value

multiplier

Specifies the local detection multiplier of a BFD session.

The value is an integer that ranges from 3 to 50.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The local detection multiplier determines the detection time of a BFD session.

Detection time = Received Detect Multi of the remote system x Max (Local RMRI/Received DMTI)

where
  • Detect Multi: local detection multiplier, which is set by using the detect-multiplier command
  • Required Min Rx Interval (RMRI): minimum interval for receiving BFD packets, which is set by using the min-rx-interval command
  • Desired Min Tx Interval (DMTI): minimum interval for sending BFD packets, which is set by using the min-tx-interval command

You can increase or reduce the local detection multiplier based on actual networking. On a stable link, there is no need to frequently detect the link status, so you can increase the local detection multiplier.

If no BFD packet is received from the peer device within the detection time, the link is considered as faulty and the BFD session enters the Down state. To reduce the usage of system resources, when the BFD session is detected in Down state, the system adjusts the sending interval to a random value greater than 1000 ms. When the BFD session becomes Up, the configured interval is restored.

Configuration Impact

  • On an unstable link, if the local detection multiplier is small, the BFD session may flap. It is recommended that a larger local detection multiplier be used.

  • When other protocols are associated with BFD, if a larger local detection multiplier is used, the BFD session takes a long period of time to detect faults on the link and traffic is switched to the backup link after the specified period. Packets may be lost during this period.

Precautions

Both ends of a BFD session can use different local detection multipliers.

Example

# Set the local detection multiplier of the BFD session atoc to 10.

<Huawei> system-view
[Huawei] bfd atoc
[Huawei-bfd-session-atoc] detect-multiplier 10

discriminator

Function

The discriminator command sets local and remote discriminators for a static BFD session.

Format

discriminator { local discr-value | remote discr-value }

Parameters

Parameter

Description

Value

local discr-value

Specifies the local discriminator of a BFD session

The value is an integer that ranges from 1 to 8191.

remote discr-value

Specifies the remote discriminator of a BFD session

The value is an integer that ranges from 1 to 8191.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When creating a static BFD session, run the discriminator command to set local and remote discriminators. Otherwise, the static BFD session cannot be set up. The local and remote discriminators differentiate BFD sessions between two systems.

Precautions

  • Only static BFD sessions require settings of local and remote discriminators.

  • The local discriminator of the local system and the remote discriminator of the remote system must be the same. If the local discriminator of the local system and the remote discriminator of the remote system are different, a static BFD session cannot be set up.

  • After the local and remote discriminators of a static BFD session are configured, the local and remote discriminators cannot be modified. To modify the local and remote discriminators of a static BFD session, delete the BFD session and reconfigure the local and remote discriminators.

Example

# Set the local discriminator of a BFD session to 80 and the remote discriminator to 800.

<Huawei> system-view
[Huawei] bfd atoc
[Huawei-bfd-session-atoc] discriminator local 80
[Huawei-bfd-session-atoc] discriminator remote 800
Related Topics

display bfd configuration

Function

The display bfd configuration command displays the BFD session configuration.

Format

display bfd configuration { { all | static } [ for-ip ] | passive-dynamic [ peer-ip peer-ip remote-discriminator discriminator ] } [ verbose ]

display bfd configuration { static name session-name | discriminator local-discr-value | dynamic | peer-ip { peer-ip [ vpn-instance vpn-name ] | default-ip } | static-auto } [ verbose ]

Parameters

Parameter

Description

Value

all

Displays the configuration of all BFD sessions.

-

static

Displays the configuration of static BFD sessions.

-

for-ip

Displays the configuration of BFD sessions for detecting an IP link.

-

peer-ip peer-ip

Specifies the peer IP address bound to the BFD session.

-

passive-dynamic

Displays the configuration of passive-dynamic BFD sessions.

-

remote-discriminator discriminator

Specifies the BFD local discriminator of the source that initiates a BFD session.

The value is an integer that ranges from 1 to 4294967295.

verbose

Displays detailed configuration of BFD sessions.

-

name session-name

Displays the configuration of a specified static BFD session. session-name specifies the name of the BFD session.

The value is a string of 1 to 15 characters without spaces.

NOTE:

When quotation marks are used around the string, spaces are allowed in the string.

dynamic

Displays the configuration of dynamic BFD sessions.

-

discriminator local-discr-value

Displays the configuration of BFD sessions with a specified local discriminator.

The value is an integer that ranges from 1 to 16383.

default-ip Display statistics about BFD sessions with the default multicast address. -

vpn-instance vpn-name

Displays the configuration of BFD sessions bound to a specified VPN instance.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

static-auto

Displays the configuration of static BFD sessions with automatically negotiated discriminators.

-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

When multiple BFD sessions exist, you can view information about certain BFD sessions by specifying the parameters such as the type, name, and peer IP address.

Precautions

If a static BFD session with automatically negotiated discriminators and a dynamic BFD session share the same configurations, you can view that the shared session configurations by BFD session type (static and dynamic).

Example

# Display the configuration of all BFD sessions.

<Huawei> display bfd configuration all
--------------------------------------------------------------------------------
CFG Name        CFG Type       LocalDiscr MIndex    SessNum  Commit   AdminDown
--------------------------------------------------------------------------------
3               S_IP_IF        10         16384     0        True     False
4               S_IP_IF        61         16385     1        True     False
eth63           S_IP_IF        106        16386     1        True     False
eth63forip      S_IP_IF        1511       16387     1        True     False
g1/0/6          S_IP_IF        101        16388     1        True     False
g7/0/22         S_IP_IF        103        16389     1        True     False
dyn_8200        Dynamic        8200       16398     1        True     False
dyn_8201        Dynamic        8201       16399     1        True     False
--------------------------------------------------------------------------------
     Total Commit/Uncommit CFG Number : 8/0                                     
Table 13-10  Description of the display bfd configuration command output

Item

Specification

CFG Name

BFD session name.

CFG Type

BFD session setup type:
  • S_IP_IF: indicates a single-hop BFD session that is established statically and bound to an interface.

  • S_IP_PEER: indicates a multi-hop BFD session that is established statically.

  • Dynamic: indicates a BFD session that is dynamically established.

  • Entire_Dynamic: indicates a BFD session that is entirely and dynamically established.

  • S_AUTO_IF: indicates a static single-hop BFD session with automatically negotiated discriminators.

  • S_AUTO_PEER: indicates a static multi-hop BFD session with automatically negotiated discriminators.

LocalDiscr

Local discriminator of the BFD session.

MIndex

Configuration entry index of a BFD session.

SessNum

Number of BFD sessions in a configuration entry.

Commit

Flag of enabling a BFD session.

After you run the commit command to commit configurations in the BFD session view, the flag is displayed as True. Otherwise, it is displayed as False.

AdminDown

Flag of the management status of a BFD session.

After you run the shutdown (BFD session view) command to disable the local session in the BFD session view, the flag is displayed as True. Otherwise, it is displayed as False.

Total Commit/Uncommit CFG Number

Total number of BFD sessions that are committed through the commit command in the BFD session view and total number of BFD sessions that are not committed.

# Display detailed configuration of all BFD sessions.

<Huawei> display bfd configuration all verbose
--------------------------------------------------------------------------------
  BFD Session Configuration Name : 1                                            
--------------------------------------------------------------------------------
  Local Discriminator    : -                Remote Discriminator   : -          
  BFD Bind Type          : Peer IP Address                                      
  Bind Session Type      : Static                                               
  Bind Peer IP Address   : 10.10.10.1                                              
  Bind Interface         : -                                                    
  Select Board           : -                                                    
  Track Interface        : -     
  TOS-EXP                : 7                Local Detect Multi     : 3          
  Min Tx Interval (ms)   : 1000             Min Rx Interval (ms)   : 1000       
  WTR Interval (ms)      : -                Process PST            : Disable
  Proc Interface Status  : Disable          
  Bind Application       : No Application Bind                                  
  Session Description    : -                                                    
--------------------------------------------------------------------------------
                                                                                
--------------------------------------------------------------------------------
  BFD Session Configuration Name : atob                                         
--------------------------------------------------------------------------------
  Local Discriminator    : 1                Remote Discriminator   : 2          
  BFD Bind Type          : Interface(GigabitEthernet0/0/1)                      
  Bind Session Type      : Static                                               
  Bind Peer IP Address   : 10.10.10.2                                             
  Bind Interface         : GigabitEthernet0/0/1                                 
  TOS-EXP                : 7                Local Detect Multi     : 3          
  Min Tx Interval (ms)   : 50               Min Rx Interval (ms)   : 50         
  WTR Interval (ms)      : -                Process PST            : Disable
  Proc Interface Status  : Disable               
  Bind Application       : No Application Bind                                  
  Session Description    : -                                                    
--------------------------------------------------------------------------------
                                                                                
     Total Commit/Uncommit CFG Number : 1/1     
Table 13-11  Description of the display bfd configuration all verbose command output

Item

Specification

BFD Session Configuration Name

BFD session name.

Local Discriminator

Local discriminator of a BFD session.

Remote Discriminator

Remote discriminator of a BFD session.

BFD Bind Type

BFD session binding type:
  • Peer IP Address: indicates multi-hop BFD for an IP link.

  • Interface: indicates single-hop BFD for an IP link.

  • Static_Auto: indicates the statically established BFD sessions with automatically negotiated discriminators.

Bind Session Type

Mode in which a BFD session is established:
  • Static: indicates the BFD sessions that are established through the static configurations.

  • Dynamic: indicates the BFD sessions that are triggered dynamically.

  • Static_Auto: indicates the statically established BFD sessions with automatically negotiated discriminators.

Bind Peer Ip Address

Peer IP address of a BFD session or multicast IP address bound to a BFD session.

Bind Interface

Local interface bound to a BFD session.

Select-board

Indicates the board for processing the BFD state machine, which can be a main control board or an interface board

Track Interface

Interface tracked by the BFD session

TOS-EXP

Priority of a BFD packet.

Local Detect Multi

Local detection multiplier.

Min Tx Interval (ms)

Minimum interval for sending BFD packets.

Min Rx Interval (ms)

Minimum interval for receiving BFD packets.

WTR Interval (ms)

WTR time.

Process PST

Flag for processing the Port Status Table (PST). If the process-pst command is configured, this field is displayed as Enable. Otherwise, it is displayed as Disable.

Proc interface status

Flag of association between the BFD session status and the interface status. If the process-interface-status command is configured, this field is displayed as Enable. If the process-interface-status sub-if command is configured, this field is displayed as Enable(Sub-If). Otherwise, it is displayed as Disable.

Bind Application

Application bound to the BFD session.

Session Description

Description of the BFD session.

Total Commit/Uncommit CFG Number

Total number of BFD sessions that are committed through the commit command in the BFD session view and total number of BFD sessions that are not committed.

display bfd interface

Function

The display bfd interface command displays information about a BFD-enabled interface.

Format

display bfd interface [ interface-type interface-number ]

Parameters

Parameter

Description

Value

interface-type interface-number

Specifies the type and number of the interface bound to the BFD session.

  • interface-type specifies the type of the interface.

  • interface-number specifies the number of the interface.

-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display bfd interface command displays information about a BFD-enabled interface, including the BFD session bound to the interface and the BFD session status.

Example

# Display information about a BFD-enabled interface.

<Huawei> display bfd interface
--------------------------------------------------------------------------------
Interface Name                                 MIndex    Sess-Count   BFD-State 
--------------------------------------------------------------------------------
GigabitEthernet0/0/1                           64        1            up        
--------------------------------------------------------------------------------
     Total Interface Number : 1       
Table 13-12  Description of the display bfd interface command output

Item

Description

Interface Name

Name of the BFD-enabled interface.

MIndex

Index of the interface entry.

Sess-Count

Number of BFD sessions bound to the interface.

BFD-State

BFD status of an interface. The value can be up or down.

Related Topics

display bfd session

Function

The display bfd session command displays information about BFD sessions.

Format

display bfd session { { all | static } [ for-ip ] | passive-dynamic [ peer-ip peer-ip remote-discriminator remote-discr-value ] } [ verbose ]

display bfd session { dynamic | discriminator discr-value | peer-ip { default-ip | peer-ip [ vpn-instance vpn-instance-name ] } | static-auto } [ verbose ]

Parameters

Parameter Description Value
all Displays all configurations of BFD sessions. -
static Displays the configuration of a static BFD session. -
for-ip Displays the configuration of a BFD session that monitors an IP link. -
nexthop ip-address Specifies the next hop address. Expressed in dotted decimal notation.
interface interface-type interface-number Specifies the type and number of an outbound interface bound to a BFD session. -
verbose Displays detailed information about the BFD configuration. -
dynamic Displays information about all dynamic BFD sessions and the static BFD sessions with auto-negotiated discriminators. -
passive-dynamic Displays information about all passive-dynamic BFD sessions. -
discriminator discr-value Displays information about a BFD session with a specified discriminator. You can specify a local discriminator only. A decimal integer ranging from 1 to .
remote-discriminator remote-discr-value Displays information about a BFD session with a specified discriminator. You can specify a remote discriminator only. A decimal integer ranging from 1 to 4294967295.
peer-ip peer-ip Displays information about a BFD session bound to the peer with a specified IP address. Expressed in dotted decimal notation.
default-ip Display statistics about a BFD session with a default multicast address. -
vpn-instance vpn-instance-name Displays information about a BFD session bound to a specified VPN instance. The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
static-auto Displays information about a static BFD session with automatically negotiated discriminators. -

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display bfd session command displays information about BFD sessions.

Prerequisites

BFD has been enabled globally.

Precautions

  • When a BFD session changes from Down to Up, if the WTR time of the session is not 0, BFD sends a notification that the session becomes Up only after the WTR time expires.
  • If a static BFD session with automatically negotiated discriminators and a dynamic BFD session are bound to the same peer IP address, the display bfd session command displays the same entry for the static BFD session or dynamic BFD session.

Example

# Display the summary of all BFD sessions.

<Huawei> display bfd session all
------------------------------------------------------------------------
Local  Remote PeerIpAddr         State       Type             InterfaceName 
------------------------------------------------------------------------------
111    222    224.0.0.184        Up          S_IP_IF          GigabitEthernet1/0/0
------------------------------------------------------------------------------
     Total UP/DOWN Session Number : 1/0
Table 13-13  Description of the display bfd session all command output

Item

Description

Local

Local discriminator of the BFD session.

To set the local discriminator, run the discriminator command.

Remote

Remote discriminator of the BFD session.

To set the remote discriminator, run the discriminator command.

PeerIpAddr

Peer IP address bound to the BFD session.

InterfaceName

Outbound interface bound to the BFD session. In multi-hop BFD, this field is displayed as - - because no interface is bound to a BFD session.

State

BFD session status:
  • Up: indicates that the BFD session is in Up state.

  • Down: indicates that the BFD session is in Down state.

  • AdminDown: indicates that a BFD session is AdminDown when the shutdown (BFD session view) command is run.

If slot is not specified, the BFD session status on the main control board is displayed.

Type

BFD session type:
  • S_IP_PEER: indicates a BFD session that is established statically and bound to an IP link.

  • S_IP_IF: indicates a BFD session that is established statically and bound to an interface.

  • S_AUTO_IF: indicates a static single-hop BFD session with automatically negotiated discriminators.

  • S_AUTO_PEER: indicates a static multi-hop BFD session with automatically negotiated discriminators.

Total UP/DOWN Session Number :

Number of BFD sessions in Up or Down state.

# Display detailed information about all BFD sessions.

<Huawei> display bfd session all verbose
--------------------------------------------------------------------------------
Session MIndex : 64        (One Hop) State : Up        Name : atob              
--------------------------------------------------------------------------------
  Local Discriminator    : 1                Remote Discriminator   : 2          
  Session Detect Mode    : Asynchronous Mode Without Echo Function              
  BFD Bind Type          : Interface(GigabitEthernet1/0/0)                      
  Bind Session Type      : Static                                               
  Bind Peer IP Address   : 10.1.1.2                                             
  NextHop Ip Address     : 10.1.1.2                                             
  Bind Interface         : GigabitEthernet1/0/0                                 
  FSM Board Id           : 0                TOS-EXP                : 7          
  Min Tx Interval (ms)   : 1000             Min Rx Interval (ms)   : 1000       
  Actual Tx Interval (ms): 1000             Actual Rx Interval (ms): 1000       
  Local Detect Multi     : 3                Detect Interval (ms)   : 3000       
  Echo Passive           : Disable          Acl Number             : -          
  Destination Port       : 3784             TTL                    : 255        
  Proc Interface Status  : Disable                                              
  WTR Interval (ms)      : -                                                    
  Active Multi           : 3                DSCP                   : -          
  Last Local Diagnostic  : No Diagnostic                                        
  Bind Application       : No Application Bind                                  
  Session TX TmrID       : -                Session Detect TmrID   : -          
  Session Init TmrID     : -                Session WTR TmrID      : -          
  Session Echo Tx TmrID  : -                                                    
  PDT Index              : FSM-0 | RCV-0 | IF-0 | TOKEN-0                       
  Session Description    : -                                                    
--------------------------------------------------------------------------------
                                                                                
     Total UP/DOWN Session Number : 1/0 
Table 13-14  Description of the display bfd session all verbose command output

Item

Specification

Session MIndex

Index of session entries.

State

BFD session status:
  • Up: indicates that the BFD session is in Up state.
  • Down: indicates that the BFD session is in Down state.
  • AdminDown: indicates that a BFD session is AdminDown when the shutdown(BFD session view) command is run.

Name

Name of a BFD session.

Local Discriminator

Local discriminator of the BFD session.

Remote Discriminator

Remote discriminator of the BFD session.

Session Detect Mode

BFD detection modes:
  • Asynchronous Mode Without Echo Function: indicates the asynchronous mode without the echo function.

  • Demand Mode Without Echo Function: indicates the demand mode without the echo function.

BFD Bind Type

BFD session binding type:
  • Peer IP Address: indicates that a multi-hop IP link is detected.

  • When one-hop BFD is used to detect an IP link, this field is displayed as Interface and the name of the bound local interface.

  • Static_Auto: indicates the BFD session with automatically negotiated discriminators.

Bind Session Type

Mode in which a BFD session is established:
  • Static: indicates that a BFD session is established manually.

  • Dynamic: indicates that a BFD session is established dynamically.

  • Static_Auto: indicates that a BFD session is established with automatically negotiated discriminators.

Bind Peer Ip Address

Peer IP address bound to the BFD session.

NextHop Ip Address

Nexthop IP address bound to the BFD session.

Bind Interface

Outbound interface bound to the BFD session.

FSM Board Id

Number of the processing board where the state machine works.

TOS-EXP

Priority of a BFD packet.

Min Tx Interval(ms)

Configured minimum interval for sending BFD packets.

Min Rx Interval(ms)

Configured minimum interval for receiving BFD packets.

Actual Tx Interval(ms)

Actual minimum interval for sending BFD packets.

Actual Rx Interval(ms)

Actual minimum interval for receiving BFD packets.

Local Detect Multi

Local detection multiplier.

Detect Interval(ms)

BFD detection time.

Echo Passive

Echo function:

  • Disable

  • Enable

Acl Number

ACL rule.

Destination Port

Number of the destination port of a BFD control packet. The single-hop BFD control packet uses destination port 3784 and the multi-hop BFD control packet uses destination port 3784 or 4784.

TTL

TTL value of BFD packets.

Proc Interface Status

Flag of association between the BFD session status and the interface status. This field is displayed as Disable.

Flag of association between the BFD session status and the interface status. If the process-interface-status command is configured, this field is displayed as Enable. Otherwise, it is displayed as Disable.

WTR Interval (ms)

WTR time of the BFD session.

Active Multi

Detection multiplier that is effective.

DSCP

DSCP value in the BFD session. The value ranges from 1 to 63. The value - indicates that the DSCP value does not take effect in the BFD session.

Last Local Diagnostic

Cause for the last BFD session in Down state:
  • Control Detection Time Expired
  • No Diagnostic
  • Neighbor Signaled Session Down

Bind Application

Application bound to the BFD session.
  • If a BFD session is not bound to an application, this field is displayed as "No Application Bind."

  • If a BFD session is bound to an application, this field is displayed as the detailed application. For example, if a BFD session is associated with OSPF, this field is displayed as OSPF.

Session TX TmrID

Timer used for a BFD session to send packets.

Session Detect TmrID

BFD session detection timer.

Session Init TmrID

Timer for state machine initialization of a BFD session.

Session WTR TmrID

WTR timer of a BFD session.

Session Echo Tx TmrID

Timer used for a BFD session to send Echo packets.

PDT Index

Product information.

Session Description

Description of the BFD session.

Total UP/DOWN Session Number

Number of BFD sessions in Up or Down state.

display bfd statistics

Function

The display bfd statistics command displays global BFD statistics.

Format

display bfd statistics

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display bfd statistics command displays global BFD statistics.

Precautions

Before using the display bfd statistics command to view BFD statistics within a specified period, run the reset bfd statistics command to clear existing statistics.

Example

# Display global BFD statistics.

<Huawei> display bfd statistics
Current Display Board Number : Main ; Current Product Register Type:AR
IP Multihop Destination Port : 3784
Total Up/Down Session Number : 1/0                                              
Current Session Number :                                                        
      Static session     : 1                Dynamic session        : 0          
      E_Dynamic session  : 0                STATIC_AUTO session    : 0          
      LDP_LSP session    : 0                STATIC_LSP session     : 0          
      TE_TUNNEL session  : 0                TE_LSP session         : 0          
      PW session         : 0                IP session             : 1          
      LDP_TUNNEL session : 0                BGP_TUNNEL session     : 0  
--------------------------------------------------------------------------------
PAF/LCS Name                       Maxnum         Minnum         Create         
--------------------------------------------------------------------------------
BFD_CFG_NUM                        32             1              2              
BFD_IF_NUM                         32             1              1              
BFD_SESSION_NUM                    32             1              1              
BFD_IO_SESSION_NUM                 32             1              0              
BFD_PER_TUNNEL_CFG_NUM             16             1              0              
--------------------------------------------------------------------------------
IO Board Current Created Session Statistics Information :(slot/number)          
--------------------------------------------------------------------------------
              0/1                 1/0                 2/0                 3/0   
              4/0                 5/0                 6/0                 7/0   
              8/0                 9/0                10/0                11/0   
             12/0                13/0                14/0                15/0   
             16/0                                                               
--------------------------------------------------------------------------------
Current Total Used Discriminator Num               : 1                          
--------------------------------------------------------------------------------
IO Board Reserved Sessions Number Information :(slot/number)                    
--------------------------------------------------------------------------------
              0/0                 1/0                 2/0                 3/0   
              4/0                 5/0                 6/0                 7/0   
              8/0                 9/0                10/0                11/0   
             12/0                13/0                14/0                15/0   
             16/0                                                               
--------------------------------------------------------------------------------
BFD HA Information :                                                            
--------------------------------------------------------------------------------
Core Current HA Status                             : Slave Not Ready            
Shell Current HA Status                            : Slave Not Ready            
--------------------------------------------------------------------------------
BFD for LSP Information :                                                       
--------------------------------------------------------------------------------
Ability of auto creating BFD session on egress     : Disable                    
Period of LSP Ping                                 : 60                         
System Session Delay Up Timer                      : OFF                        
--------------------------------------------------------------------------------
Table 13-15  Description of the display bfd statistics command output

Item

Description

Current Display Board Number

Number of the board where information is displayed. "Main" indicates the MPU.

Current Product Register Type

Type of the current product.

IP Multihop Destination Port

UDP port number.

Total Up/Down Session Number

Total number of BFD sessions in Up or Down state.

Current Session Number

Number of current BFD sessions.

Static session

Number of static BFD sessions.

Dynamic session

Number of dynamic BFD sessions.

E_Dynamic session

Number of entirely dynamic sessions.

STATIC_AUTO session

Number of BFD sessions with automatically negotiated discriminators.

LDP_LSP session

Number of BFD sessions for detecting an LDP LSP.

STATIC_LSP session

Number of BFD sessions for detecting a static LSP.

TE_TUNNEL session

Number of BFD sessions for detecting a TE tunnel.

TE_LSP session

Number of BFD sessions for detecting a TE LSP.

PW session

Number of BFD sessions for detecting a PW.

IP session

Number of BFD sessions for detecting an IP address.

LDP_TUNNEL session

Number of current BFD sessions for LDP tunnel

BGP_TUNNEL session

Number of current BFD sessions for BGP tunnel

PAF/LCS Name

Project name of the license file.

BFD_CFG_NUM

Maximum number of BFD sessions that can be globally configured.

BFD_IF_NUM

Maximum number of BFD sessions that can be bound to an interface.

BFD_SESSION_NUM

Maximum number of BFD sessions that can be globally established.

BFD_IO_SESSION_NUM

Maximum number of BFD sessions that can be established globally.

BFD_PER_TUNNEL_CFG_NUM

Maximum number of BFD sessions that can be configured on a tunnel.

IO Board Current Created Session Statistics Information :

Number of BFD sessions that are established on a board.

Current Total Used Discriminator Num

Total number of currently configured discriminators.

IO Board Reserved Sessions Number Information : (slot/number)

Number of reserved boards that are bound to a BFD session.

BFD HA Information

-

Core Current HA Status

HA status in the core:

  • Normal: indicates that the HA status is normal.

  • Batch Backup Going: indicates that backup is being performed.

  • Slave Not Ready: indicates that the slave board is not ready.

  • Smooth Going: indicates that smooth processing is being performed.

Shell Current HA Status

HA status in the shell:

  • Normal: indicates that the HA status is normal.

  • Batch Backup Going: indicates that backup is being performed.

  • Slave Not Ready: indicates that the slave board is not ready.

  • Smooth Going: indicates that smooth processing is being performed.

Ability of auto creating BFD session on egress

Whether the capability to establish an entirely dynamic BFD session is enabled.

Period of LSP Ping

Interval for sending LSP ping packets of dynamic BFD sessions for detecting an LSP/PW.

System Session Delay Up Timer

Status of the delay Up timer:
  • OFF: indicates that the system works properly.
  • Xs: indicates that the system recovers after X seconds and a BFD session can be Up.

display bfd statistics session

Function

The display bfd statistics session command displays BFD session statistics.

Format

display bfd statistics session { { all | static } [ for-ip ] }

display bfd statistics session { dynamic | discriminator discr-value | peer-ip default-ip | peer-ip ip-address [ vpn-instance vpn-instance-name ] | static-auto }

Parameters

Parameter

Description

Value

all

Displays statistics on all BFD sessions.

-

static

Displays statistics on all static BFD sessions.

-

dynamic

Displays statistics on all dynamic BFD sessions.

-

discriminator discr-value

Displays statistics on a BFD session with a specified local discriminator.

The value is an integer that ranges from 1 to 16383.

peer-ip default-ip

Display statistics about BFD sessions with the default multicast address.

-

peer-ip ip-address

Displays statistics on BFD sessions bound to a specified IP address.

-

static-auto

Displays the configuration of static BFD sessions with automatically negotiated discriminators.

-

vpn-instance vpn-instance-name

Displays statistics on BFD sessions bound to a specified VPN instance.

The value is a string of 1 to 31 case-sensitive characters, spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

for-ip

Displays statistics on BFD sessions for detecting IP links.

-

interface-type interface-number

Specifies the type and number of the interface bound to a BFD session.

  • interface-type specifies the interface type.

  • interface-number specifies the interface number.

-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display bfd statistics session command displays BFD session statistics.

Precautions

  • If static BFD with automatically negotiated discriminators and dynamic BFD share a session, you can specify all, static-auto, or dynamic for query.

  • Before using the display bfd statistics session command to view BFD session statistics, run the reset bfd statistics command to clear existing statistics.

Example

# Display statistics on all BFD sessions.

<Huawei> display bfd statistics session all 
--------------------------------------------------------------------------------
Session MIndex : 64        (One Hop) State : Up      Name : atob              
--------------------------------------------------------------------------------
  Session Type                        : Static                                  
  Bind Type                           : IP                                      
  Local/Remote Discriminator          : 10/20                                   
  Received Packets                    : 0                                       
  Send Packets                        : 7                                       
  Received Bad Packets                : 0                                       
  Send Bad Packets                    : 2217                                    
  Down Count                          : 1                                       
  ShortBreak Count                    : 0                                       
  Send Lsp Ping Count                 : 0                                       
  Dynamic Session Delete Count        : 0                                       
  Create Time                         : 2011/12/08 10:34:08                     
  Last Down Time                      : 2011/12/08 10:38:16                     
  Total Time From Last DOWN           : ---D:--H:--M:--S                        
  Last Up Time                        : 2011/12/08 10:35:01                     
  Last Up Lasting Time                : 000D:00H:03M:15S                        
  Total Time From Create              : 000D:07H:28M:51S                        
--------------------------------------------------------------------------------
     Total Session Number : 1                                               
Table 13-16  Description of the display bfd statistics session all command output

Item

Description

Session MIndex

Index of session entries.

State

Status of a session.

Name

Name of a BFD session

Session Type

Mode in which a BFD session is established:
  • Static: indicates that a BFD session is established statically.

  • Dynamic: indicates that a BFD session is established dynamically.

  • Static_Auto: indicates that a BFD session is established with automatically negotiated discriminators.

  • Entire_Dynamic: indicates the BFD sessions that are triggered entirely dynamically. After dynamic BFD session setup is enabled on the sink point of an LSP, a BFD session of this type is created.

Bind Type

BFD session binding type.

Local/Remote Discriminator

Local or remote discriminator of a BFD session.

Received Packets

Number of BFD packets received at the local end. This field can be deleted using the reset bfd statistics command.

Send Packets

Number of BFD packets sent by the local end. This field can be deleted using the reset bfd statistics command.

Received Bad Packets

Number of received error packets.

Send Bad Packets

Number of sent error packets.

Down Count

Number of times that a BFD session became Down.

ShortBreak Count

Number of times that a BFD session was transiently disconnected.

Send Lsp Ping Count

Number of LSP ping packets sent by the local end.

Dynamic Session Delete Count

Number of dynamic BFD sessions deleted.

Create Time

Time when a BFD session was created.

Last Down Time

Last time when a BFD session became Down.

Total Time From Last DOWN

Period from last time when a BFD session became Down to the current time.

Last Up Time

Last time the BFD session becomes Up.

Last Up Lasting Time

Period from the last time when a BFD session is Up to the current time.

Total Session Number

Number of BFD sessions.

display bfd ttl

Function

The display bfd ttl command displays the globally configured TTL.

Format

display bfd ttl

Parameters

None

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

The display bfd ttl command displays the globally configured TTL.

Example

# Display information about all globally configured TTLs.

<Huawei> display bfd ttl
--------------------------------------------------------------------------
Peer IP                                    Mask        Type           Value  
--------------------------------------------------------------------------
10.10.10.0                                 24          single-hop     255
Table 13-17  Description of the display bfd ttl command output

Item

Specification

Peer IP

IP segment address.

Mask

Mask length.

Type

Type of the BFD session. The value can be single-hop or multi-hop.

Value

Initial value of the global TTL value.

Related Topics

min-echo-rx-interval

Function

The min-echo-rx-interval command configures the minimum interval for receiving BFD packets of a BFD session supporting the BFD echo function.

The undo min-echo-rx-interval command restores the default minimum interval.

By default, the minimum interval is 1000 ms.

Format

min-echo-rx-interval interval

undo min-echo-rx-interval

Parameters

Parameter

Description

Value

interval

Specifies the minimum interval for receiving BFD packets of a BFD session supporting the BFD echo function.

The value is an integer that ranges from 10 to 2000, in milliseconds.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After creating a BFD session supporting the BFD echo function, you can set the minimum interval for receiving BFD packets of a BFD session supporting the BFD echo function.

Prerequisites

A BFD session supporting the echo function has been configured using the bfd one-arm-echo command.

Example

# Set the minimum interval for receiving BFD packets of a BFD session supporting the BFD echo function to 100 ms.

<Huawei> system-view
[Huawei] bfd test
[Huawei-bfd-session-test] min-echo-rx-interval 100

min-rx-interval

Function

The min-rx-interval command sets the minimum interval for receiving BFD packets.

The undo min-rx-interval command restores the default minimum interval for receiving BFD packets.

By default, the minimum interval for receiving BFD packets is 1000 ms.

Format

min-rx-interval interval

undo min-rx-interval

Parameters

Parameter

Description

Value

interval

Specifies the minimum interval for receiving BFD packets.

The value is an integer that ranges from 10 to 2000, in milliseconds.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The local detection multiplier determines the detection time of a BFD session.

Detection time = Received Detect Multi of the remote system x Max (Local RMRI/Received DMTI)

where
  • Detect Multi: local detection multiplier, which is set by using the detect-multiplier command
  • Required Min Rx Interval (RMRI): minimum interval for receiving BFD packets, which is set by using the min-rx-interval command
  • Desired Min Tx Interval (DMTI): minimum interval for sending BFD packets, which is set by using the min-tx-interval command

Precaution

  • You can increase or reduce the minimum interval for receiving BFD packets based on actual networking. The minimum interval for receiving BFD packets determines the detection time of a BFD session. On an unstable link, if the minimum interval for receiving BFD packets is small, the BFD session may flap. You can increase the minimum interval for receiving BFD packets. The default value is recommended. Do not randomly change the minimum interval for receiving BFD packets.

  • If no BFD packet is received from the peer device within the detection time, the link is considered as faulty and the BFD session enters the Down state. To reduce the usage of system resources, when the BFD session is detected in Down state, the system adjusts the sending interval to a random value greater than 1000 ms. When the BFD session becomes Up, the configured interval is restored.

Example

# Set the minimum interval for receiving BFD packets to 1000 ms.

<Huawei> system-view
[Huawei] bfd session
[Huawei-bfd-session-session] min-rx-interval 1000

min-tx-interval

Function

The min-tx-interval command sets the minimum interval for sending BFD packets.

The undo min-tx-interval command restores the default minimum interval for sending BFD packets.

By default, the minimum interval for sending BFD packets is 1000 ms.

Format

min-tx-interval interval

undo min-tx-interval

Parameters

Parameter

Description

Value

interval

Specifies the minimum interval for sending BFD packets.

The value is an integer that ranges from 10 to 2000, in milliseconds.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The local detection multiplier determines the detection time of a BFD session.

Detection time = Received Detect Multi of the remote system x Max (Local RMRI/Received DMTI)

where
  • Detect Multi: local detection multiplier, which is set by using the detect-multiplier command
  • Required Min Rx Interval (RMRI): minimum interval for receiving BFD packets, which is set by using the min-rx-interval command
  • Desired Min Tx Interval (DMTI): minimum interval for sending BFD packets, which is set by using the min-tx-interval command

Precaution

  • You can increase or reduce the minimum interval for sending BFD packets based on actual networking. The minimum interval for sending BFD packets determines the detection time of a BFD session. On an unstable link, if the minimum interval for sending BFD packets is small, the BFD session may flap. You can increase the minimum interval for sending BFD packets. The default value is recommended. Do not randomly change the minimum interval for sending BFD packets.

  • If no BFD packet is received from the peer device within the detection time, the link is considered as faulty and the BFD session enters the Down state. To reduce the usage of system resources, when the BFD session is detected in Down state, the system adjusts the sending interval to a random value greater than 1000 ms. When the BFD session becomes Up, the configured interval is restored.

Example

# Set the minimum interval for sending BFD packets to 1000 ms.

<Huawei> system-view
[Huawei] bfd session
[Huawei-bfd-session-session] min-tx-interval 1000

multi-hop

Function

The multi-hop command configures the destination port number for a multi-hop BFD session.

The undo multi-hop command restores the default destination port number for a multi-hop BFD session.

By default, destination port 3784 is used in multi-hop BFD control packets.

Format

multi-hop destination-port { 3784 | 4784 }

undo multi-hop destination-port

Parameters

Parameter

Description

Value

3784

Indicates that destination port 3784 is used in multi-hop BFD control packets.

-

4784

Indicates that destination port 4784 is used in multi-hop BFD control packets.

-

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

As defined in the BFD draft, destination port 4784 is used by multi-hop BFD control packets. When the device running the latest version interworks with devices running earlier versions, destination port 3784 is used by multi-hop BFD control packets. When the device interworks with non-Huawei devices, destination port 4784 is used by multi-hop BFD control packets.

Precautions

  • If destination port 4784 is used by multi-hop BFD control packets, the device fails to negotiate with the remote device on which destination port 3784 is used by multi-hop BFD control packets.

  • If destination port 3784 is used by multi-hop BFD control packets, the device can successfully negotiate with the remote device on which destination port 4784 is used by multi-hop BFD control packets. On the device that is configured with destination port 3784, destination port 3784 is automatically updated to destination port 4784.

  • If destination port 3784 is used by both multi-hop and single-hop BFD control packets, the single-hop and multi-hop BFD control packets are processed according to their TTLs.

  • When a large number of multi-hop BFD sessions are set up, updating the destination ports may take a long time. Therefore, when a smaller interval for configuring multi-hop BFD sessions is used, the system displays a message indicating that the BFD session is being updated and you may try later.

  • When the number of the destination port used in a multi-hop BFD control packet is updated, the BFD session in Up state may change to Down and then the BFD session is renegotiated.

NOTE:

Determine to use port 3784 or 4784 before configuring a muti-hop BFD session bewteen a Huawei device and a non-Huawei device. If the port number is not specified, you must change the port number after the BFD session becomes Up. Before changing the port number, shut down the BFD session. This is because changing the port number may cause all multi-hop BFD session to flap and affect services.

Example

# Set the default destination port number to 4784 for multi-hop BFD control packets.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] multi-hop destination-port 4784

peer-ip ttl

Function

The peer-ip ttl command configures the TTL value in BFD packets.

The undo peer-ip ttl command restores the default TTL value in BFD packets.

By default, the TTL value in BFD packets varies with the BFD session type. By default, for a static BFD session, the TTL value of a single-hop BFD packet is 255 and the TTL value of a multi-hop BFD packet is 254. For a dynamic BFD session, the TTL value of a single-hop BFD packet is 255 and the TTL value of a multi-hop BFD packet is 253.

Format

peer-ip peer-ip mask-length ttl { single-hop | multi-hop } ttl-value

undo peer-ip peer-ip mask-length ttl { single-hop | multi-hop }

Parameters

Parameter

Description

Value

peer-ip

Specifies the peer IP address bound to the BFD session.

-

mask-length

Specifies the mask length of the IP address.

The value is an integer that ranges from 8 to 32.

single-hop

Indicates the single-hop BFD session.

-

multi-hop

Indicates the multi-hop BFD session.

-

ttl-value

Specifies the TTL value in BFD packets.

The value is an integer that ranges from 1 to 255.

Views

BFD view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can set the TTL value in BFD packets to enable the Huawei device to interwork with each other in different versions, with upgraded devices, and with non-Huawei devices.

Precautions

  • The length of the IP segment address must match the mask. A long mask takes precedence over a short mask.

  • The same IP segment addresses, masks, and TTL values of specified BFD session types cannot be configured simultaneously.

  • When the IP network segment addresses and mask lengths are the same, the TTL value of a single-hop BFD session must be greater than the TTL value of a multi-hop BFD session.

  • When a large number of BFD sessions are set up, updating the TTL value may take a long time. Therefore, when a smaller interval for configuring BFD sessions is used, the system displays a message indicating that the BFD session is being updated and you may try later.

  • After the TTL value in multi-hop BFD packets is configured, you must configure the same peer IP address, mask length longer than the mask length for the TTL value in multi-hop BFD packets, and TTL value in single-hop BFD packets. This is because the TTL value in multi-hop BFD packets affects dynamic single-hop BFD sessions.

Example

# Set the TTL value of single-hop BFD sessions to 254, the IP segment address to 10.10.10.0, and the mask length to 24.

<Huawei> system-view
[Huawei] bfd
[Huawei-bfd] peer-ip 10.10.10.0 24 ttl single-hop 254

process-interface-status

Function

The process-interface-status command associates the BFD session status with the bound interface status.

The undo process-interface-status command restores the default setting.

By default, the BFD session status is not associated with the interface status. That is, the change of the BFD session status does not affect the interface status.

Format

process-interface-status [ sub-if ]

undo process-interface-status

Parameters

Parameter

Description

Value

sub-if

Associates the BFD session status with the bound sub-interface status. The status change of a BFD session that is bound to a primary interface affects the status of the primary interface and sub-interface.

-

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

If a transmission device exists on a direct link, BFD detects a link fault faster than a link protocol on an interface. The link protocol status of a trunk or VLANIF interface depends on the link protocol status of member interfaces.

To help BFD rapidly report the detection result to the application, a BFD status attribute is added to the interface management module of each interface. This attribute indicates the status of the BFD session that is bound to the interface. The system obtains the interface status based on the link status, protocol status, and BFD status on the interface, and then reports the interface status to the application.

Precautions

When configuring the process-interface-status command, pay attention to the following points:
  • The process-interface-status command takes effect for only the single-hop BFD session that uses the default multicast address. The BFD session can be associated to the primary interface or sub-interface status.

  • If multiple BFD sessions are bound to an interface, you can use the process-interface-status command for only one BFD session. The change of only one BFD session changes the status of the bound interface.

  • The BFD session does not report the BFD status to the bound interface immediately after the commit command is executed because the BFD session may not be set up or not Up before the commit command is executed. This prevents the BFD session from reporting an incorrect state to the interface. When the commit command is executed and the BFD status changes, the BFD session reports the BFD status to the interface to trigger the interface status change.

  • If the process-interface-status command is saved in the configuration file, the BFD session for which the process-interface-status command is run notifies an interface that the BFD session becomes Down when the device is restarted. This is because the initial status of the interface is Down.

  • Before the BFD session status is associated with the interface status, the BFD configurations on two ends must be correct and matched. If the BFD session status on the local interface is Down, check whether the BFD configuration on the peer end is correct or whether the BFD session is shut down.

  • If the BFD session must be synchronized to an interface immediately, ensure that the BFD configurations on the two ends are the same and run the shutdown (BFD session view) and undo shutdown (BFD session view) commands on the BFD session. When the undo shutdown (BFD session view) command is executed for a BFD session, a BFD session detection timer is started. If the BFD session becomes Up through negotiation before the timer times out, the BFD session notifies an interface of the Up state. Otherwise, the BFD session considers the link faulty and notifies the interface of the Down state. The status of a BFD session and the status of an interface can be synchronized in real time.

Example

# Associate the BFD session with an interface to which the BFD session is bound.

<Huawei> system-view
[Huawei] bfd test
[Huawei-bfd-session-test] process-interface-status

process-pst

Function

The process-pst command enables the system to modify the port status table (PST) when the BFD session status changes.

The undo process-pst command restores the default configuration.

By default, the device is disabled from modifying the PST.

Format

process-pst

undo process-pst

Parameters

None

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After a BFD session that is enabled to modify the PST detects a BFD session Down event, the system modifies the corresponding entry in the PST.

Precautions

Example

# Enable the system to modify the PST when the BFD session status changes.

<Huawei> system-view
[Huawei] bfd 4ldplsp bind ldp-lsp peer-ip 10.10.9.9 nexthop 10.10.10.10
[Huawei-bfd-lsp-session-4ldplsp] process-pst
<Huawei> system-view
[Huawei] bfd 4staticlsp bind static-lsp 39
[Huawei-bfd-lsp-session-4staticlsp] process-pst
<Huawei> system-view
[Huawei] bfd 4mplste bind mpls-te interface Tunnel 0/0/0
[Huawei-bfd-lsp-session-4mplste] process-pst
<Huawei> system-view
[Huawei] bfd 4mplstelsp bind mpls-te interface Tunnel 0/0/0 te-lsp
[Huawei-bfd-lsp-session-4mplstelsp] process-pst

reset bfd statistics

Function

The reset bfd statistics command clears statistics on received and sent packets of a BFD session.

Format

reset bfd statistics { all | discriminator discr-value }

Parameters

Parameter

Description

Value

all

Clears statistics on received and sent packets of all the BFD sessions.

-

discriminator discr-value

Clears statistics on received and sent packets of a BFD session with a specified discriminator.

The value is an integer that ranges from 1 to 16383.

Views

User view

Default Level

3: Management level

Usage Guidelines

Usage Scenario

The reset bfd statistics command clears statistics on received and sent packets of a BFD session.

Precautions

The deleted statistics on received and sent packets of a BFD session cannot be restored. Exercise caution when you use this command.

Example

# Clear statistics on packets of all BFD sessions.

<Huawei> reset bfd statistics all

shutdown (BFD session view)

Function

The shutdown command enables the BFD session to enter the AdminDown state.

The undo shutdown command enables a BFD session.

By default, a BFD session is enabled.

Format

shutdown

undo shutdown

Parameters

None

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The shutdown command enables the BFD session to enter the AdminDown state.

Prerequisites

A BFD session has been created.

Precautions

  • To modify the configuration of a BFD session, run the shutdown command to disable the BFD session. After the configuration is modified successfully, run the undo shutdown command to enable the BFD session again.

  • To disable a BFD session without affecting the upper-layer application, run the shutdown command to enable the BFD session to enter the AdminDown state.

Example

# Stop the BFD session atoc.

<Huawei> system-view
[Huawei] bfd atoc
[Huawei-bfd-session-atoc] shutdown
Related Topics

tos-exp

Function

The tos-exp command sets the priority of BFD packets.

The undo tos-exp command restores the default priority of BFD packets.

By default, the priority of BFD packets is 7.

Format

tos-exp tos-value

undo tos-exp

Parameters

Parameter

Description

Value

tos-value

Specifies the priority of BFD packets. A greater value indicates a higher priority of BFD packets.

The value is an integer that ranges from 0 to 7. The default value is 7.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

You can change the priority of BFD packets in the following scenarios:

  • Detect whether packets with different priorities on a link can be forwarded.

  • Ensure that BFD packets with a higher priority are forwarded first.

Precautions

When congestion occurs, the system first sends BFD packets with a higher priority.

The tos-exp command takes effect for only static BFD sessions.

Example

# Set the priority of BFD packets for the BFD session atob to 5.

<Huawei> system-view
[Huawei] bfd atob
[Huawei-bfd-session-atob] tos-exp 5
Related Topics

track bfd

Function

The track bfd command adds a BFD session to a BFD group.

The undo track bfd command deletes a BFD session from a BFD group.

Format

track bfd session-name

undo track bfd session-name

Parameters

Parameter Description Value
session-name Specifies the name of a BFD session. The value is a string of 1 to 15 case-sensitive characters without spaces.
NOTE:

If the character string is quoted by quotation marks, the character string can contain spaces.

Views

BFD group view

Default Level

2: Configuration level

Usage Guidelines

On a live network, to improve network reliability, a branch gateway connects to the headquarters using multiple links. The branch gateway needs to determine on which link an IPSec tunnel is established. You can associate IPSec with BFD so that the branch gateway controls IPSec tunnel setup or teardown according to the BFD session or BFD group status. The association ensures that only one link is available at any time, and implements redundancy control of the IPSec tunnel.

Example

# Add a BFD session to a BFD group.

<Huawei> system-view
[Huawei] bfd-group group
[Huawei-bfd-group-group] track bfd bfd

wtr

Function

The wtr command sets the WTR time of a BFD session.

The undo wtr command restores the default WTR time of a BFD session.

By default, the WTR time is 0, indicating that the status change of a BFD session is reported immediately.

Format

wtr wtr-value

undo wtr

Parameters

Parameter

Description

Value

wtr-value

Specifies the WTR time of a BFD session.

The value is an integer that ranges from 1 to 60, in minutes. The default value is 0.

Views

BFD session view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a BFD session flaps, the WTR time prevents frequent active/standby switchovers of the application associated with the BFD session.

Precautions

  • If the WTR time is set, the system reports the BFD session Up event to the upper-layer application only after the WTR timer expires. Other status change events are reported immediately, which are not affected by the WTR time.

  • Both ends must use the same WTR time. Otherwise, when the session status changes at one end, applications at both ends detect different BFD session status.

Example

# Set the WTR time of a BFD session to 10 minutes.

<Huawei> system-view
[Huawei] bfd atoc
[Huawei-bfd-session-atoc] wtr 10
Related Topics
Translation
Download
Updated: 2019-05-29

Document ID: EDOC1000097293

Views: 91488

Downloads: 124

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next