prefix-suppression

Use prefix-suppression to disable an OSPFv3 process from advertising all prefixes except for the prefixes of loopback interfaces and passive interfaces.

Use undo prefix-suppression to restore the default.

Syntax

prefix-suppression

undo prefix-suppression

Default

An OSPFv3 process advertises all prefixes.

Views

OSPFv3 view

Predefined user roles

network-admin

Usage guidelines

By default, an OSPFv3 interface advertises all of its prefixes in LSAs. To speed up OSPFv3 convergence, you can suppress interfaces from advertising all of their prefixes. This feature helps improve network security by preventing IP routing to the suppressed networks.

To disable an OSPFv3 process from advertising the prefixes of loopback and passive interfaces, configure prefix suppression on the interfaces by using the ospfv3 prefix-suppression command.

When prefix suppression is enabled:

• OSPFv3 does not advertise the prefixes of suppressed interfaces in Type-8 LSAs.

• On broadcast and NBMA networks, the DR does not advertise the prefixes of suppressed interfaces in Type-9 LSAs that reference Type-2 LSAs.

• On P2P and P2MP networks, OSPFv3 does not advertise the prefixes of suppressed interfaces in Type-9 LSAs that reference Type-1 LSAs.

Examples

# Enable prefix suppression for OSPFv3 process 100.

<Sysname> system-view
[Sysname] ospfv3 100
[Sysname-ospfv3-100] prefix-suppression

Related commands

ospfv3 prefix-suppression