bgp cluster-id cluster-id
no bgp cluster-id cluster-id
Cluster ID of this router acting as a route reflector; maximum of 4 bytes.
To configure the cluster ID if the BGP cluster has more than one route reflector, use the bgp cluster-id command in router configuration mode. To remove the cluster ID, use the no form of this command.
Together, a route reflector and its clients form a cluster.
Usually a cluster of clients will have a single route reflector. In that case, the cluster is identified by the router ID of the route reflector. In order to increase redundancy and avoid a single point of failure, a cluster might have more than one route reflector. In this case, all route reflectors in the cluster must be configured with the 4-byte cluster ID so that a route reflector can recognize updates from route reflectors in the same cluster.
If the cluster has more than one route reflector, use this command to configure the cluster ID.
In the following example, the local router is one of the route reflectors serving the cluster. It is configured with the cluster ID to identify the cluster:Router(config)# router bgp 5 Router(config-router)# neighbor 184.108.40.206 route-reflector-client Router(config-router)# bgp cluster-id 50000
bgp client-to-client reflection
show ip bgp
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