avoid-microloop frr-protected rib-update-delay

Function

The avoid-microloop frr-protected rib-update-delay command configures a delay after which IS-IS delivers routes.

The undo avoid-microloop frr-protected rib-update-delay command restores the default delay.

By default, IS-IS delays route delivery for 100 ms.

Format

avoid-microloop frr-protected rib-update-delay delay-interval

undo avoid-microloop frr-protected rib-update-delay

Parameters

Parameter	Description	Value
delay-interval	Specifies a delay after which IS-IS delivers routes.	The value is an integer ranging from 100 to 5000, in ms.

Parameter

Description

Value

delay-interval

Specifies a delay after which IS-IS delivers routes.

The value is an integer ranging from 100 to 5000, in ms.

Views

IS-IS view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
isis	write

Usage Guidelines

Usage Scenario

If IS-IS remote FRR is enabled and the primary link fails, traffic is switched to the backup link. If route convergence occurs again, traffic is switched from the backup link to a new primary link. During the switchover, microloop may occur. To prevent this problem, IS-IS anti-microloop is enabled by default and delays the switching. To configure a delay after which IS-IS delivers routes, run the avoid-microloop frr-protected rib-update-delay command. After the command is run, IS-IS does not implement route convergence or switch traffic to the backup link in the preceding scenario until the delay elapses.

Prerequisites

An IS-IS process has been created and the IS-IS view has been displayed using the isis command.

Example

# Configure IS-IS to delay route delivery for 1000 ms.

<HUAWEI> system-view
[~HUAWEI] isis
[*HUAWEI-isis-1] avoid-microloop frr-protected rib-update-delay 1000