Command:

bgp cluster-id


Mode:

Router(config-router)#


Syntax:

bgp cluster-id cluster-id
no bgp cluster-id cluster-id

 

Syntax Description:

cluster-id

Cluster ID of this router acting as a route reflector; maximum of 4 bytes.

 

Command Description:

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.


Example:

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 198.92.70.24 route-reflector-client
Router(config-router)# bgp cluster-id 50000


Misconceptions:

None


Related Commands:

bgp client-to-client reflection
show ip bgp

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