area prefix-list (OSPFv2)

Filters prefixes advertised in type 3 link-state advertisements (LSAs) between OSPFv2 areas of an area border router (ABR).

Syntax

area { ip-addr | decimal } prefix-list name { in | out }

no area { ip-addr | decimal } prefix-list name { in | out }

ip-addr: Area address in IP address format.
decimal: Area address in decimal format.
prefix-list name: Specifies a prefix-list between 1 and 32 characters.
in: Specifies that the prefix list is applied to prefixes advertised to the specified area from other areas.
out: Specifies that the prefix list is applied to prefixes advertised out of the specified area to other areas.

OSPF router configuration mode

OSPF router VRF configuration mode

This command is only applicable to ABRs. The no form of the command changes or cancels the configured filter and advertises all type 3 LSAs.

The following example applies a prefix list to type 3 LSAs advertised out of an area with the area-id 10.1.1.1.

device# configure terminal
device(config)# router ospf
device(config-router-ospf-vrf-default-vrf)# area 10.1.1.1 prefix-list myprefixlist out

The following example applies a prefix list to type 3 LSAs advertised in to an area with the area-id 10.1.1.1.

device# configure terminal
device(config)# router ospf
device(config-router-ospf-vrf-default-vrf)# area 10.1.1.1 prefix-list myprefixlist in