graceful-restart suppress-sa

Use graceful-restart suppress-sa to suppress the Suppress-Advertisement (SA) bit during restart.

Use undo graceful-restart suppress-sa to restore the default.

Syntax

graceful-restart suppress-sa

undo graceful-restart suppress-sa

Default

The SA bit is set during restart.

Views

IS-IS view

Predefined user roles

network-admin

Usage guidelines

Suppressing the SA bit is mainly for avoiding black hole route. If a router starts or reboots without keeping the local forwarding table, sending packets to the router might result in severe packet loss. To avoid this, you can set the SA bit of the hello packet sent by the GR restarter to 1. Upon receiving such hello packets, the GR helpers will not advertise the GR restarter through LSP.

Examples

# Suppress the SA bit during graceful restart.

<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] graceful-restart suppress-sa

Related commands

graceful-restart