remote-lfa available-tunnel-destination (OSPF FRR view)

Function

The remote-lfa available-tunnel-destination command configures a filtering policy to allow only the PQ node that matches the policy to be used as the next hop of an LFA link.

The undo remote-lfa available-tunnel-destination command restores the default configuration.

By default, no filtering policy is configured, and each PQ node can be used as a next hop of an LFA link.

Format

remote-lfa available-tunnel-destination ip-prefix ip-prefix-name

undo remote-lfa available-tunnel-destination ip-prefix ip-prefix-name

Parameters

Parameter	Description	Value
ip-prefix ip-prefix-name	Specifies the name of an IP prefix list.	The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Parameter

Description

Value

ip-prefix ip-prefix-name

Specifies the name of an IP prefix list.

The name is a string of 1 to 169 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

Views

OSPF FRR view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

In most cases, Remote LFA obtains multiple PQ nodes using the LFA algorithm. In this situation, you can run the remote-lfa available-tunnel-destination command to configure a filtering policy to allow only the PQ node that matches the policy to be used as the next hop of an LFA link.

Prerequisites

FRR has been enabled and the FRR view has been displayed using the frr command.

Precautions

If the remote-lfa command is not run prior to the remote-lfa available-tunnel-destination command, the remote-lfa available-tunnel-destination command can be run, but its configuration does not take effect on interfaces.

If you run the remote-lfa command when the remote-lfa available-tunnel-destination command has been run, Remote LFA is disabled.

Example

# Enable the device to use PQ nodes as next hops of LFA links.

<HUAWEI> system-view
[~HUAWEI] ip ip-prefix prefix1 permit 0.0.0.0 0 greater-equal 17 less-equal 18
[*HUAWEI] ospf
[*HUAWEI-ospf-1] frr
[*HUAWEI-ospf-1-frr] loop-free-alternate
[*HUAWEI-ospf-1-frr] remote-lfa tunnel ldp
[*HUAWEI-ospf-1-frr] remote-lfa available-tunnel-destination ip-prefix prefix1