13.5.10 Configuration of BGP4 learned route limit

(1) List of configuration commands

The following tables list the commands used to configure the limit on the number of learned BGP4 routes.

Table 13-24: List of configuration commands

Command name	Description
neighbor maximum-prefix	Limits the number of routes that can be learned from a specified peer.

(2) Setting BGP4 learned route limit

Points to note

The example below shows how to limit the number of BGP4 routes that can be learned from a peer by using the neighbor maximum-prefix command.

Command examples

1. (config)# router bgp 65531

   (config-router)# bgp router-id 192.168.1.100

   (config-router)# neighbor 172.16.2.2 remote-as 65532

   (config-router)# neighbor 192.168.2.2 remote-as 65531

   Configure the BGP4 peers.

2. (config-router)# neighbor 172.16.2.2 maximum-prefix 10000 80 restart 60

   Allows a maximum of 10000 routes to be learned from the external peer (remote peer address: 172.16.2.2). Sets a threshold of 80% for output of a warning message, and an interval of 60 minutes before reconnection of any peer that was disconnected because it exceeded the maximum.

3. (config-router)# neighbor 192.168.2.2 maximum-prefix 1000 warning-only

   Allows a maximum of 1000 routes to be learned from the internal peer (remote peer address:172.16.2.2), and specifies that any peer exceeding this maximum will not be disconnected.