29.2.8 Setting Learned Route Filtering Conditions

Points to note

The example below shows how to apply learned route filtering on a per-peer basis by specifying the filters to be applied in the neighbor in command.

Command examples

1. (config)# router bgp 65531

   (config-router)# address-family ipv6

   (config-router-af)# neighbor 3ffe:172:16:2::2 route-map SET_LOCPREF_IN in

   Sets 120 in the LOCAL_PREF attribute of routes to the destination network 3ffe:10:10.::/64 that were learned from the peer (remote peer address: 3ffe:172:16:2::2) and gives such routes higher priority than routes learned from other peers.

2. (config-router-af)# neighbor 3ffe:10:2:2::2 route-map SET_ASPREPEND_IN in

   Prepends one AS in the AS array when the end of the AS array of the AS_PATH attribute learned from the peer (remote peer address: 3ffe:10:2:2::2) is 65529, and gives such routes lower priority than routes learned from other peers.

3. (config-router-af)# neighbor 3ffe:10:1:2::2 route-map SET_ORIGIN_IN in

   Sets INCOMPLETE in the ORIGIN attribute of routes to the destination network 3ffe:172:20:0::/64 that were learned from the peer (remote peer address: 3ffe:10:1:2::2) and gives such routes lower priority than routes learned from other peers.

4. (config-router-af)# neighbor 3ffe:192:168:2::2 route-map SET_MED_IN in

   Sets 100 in the MED attribute of routes to the destination network 3ffe:172:30::/64 that were learned from the peer (remote peer address: 3ffe:192:168:2::2).