bgp cluster-id

This command specifies the route reflection cluster ID for BGP.

Syntax

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

Parameters

cluster-id Specifies a cluster-ID in dotted-quad format used by route reflectors to prevent route propagation loops within the cluster.

Defaults

None.

Mode

BGP Router Configuration.

Usage

The bgp cluster-id command specifies the route reflection cluster ID for BGP. The cluster ID defaults to be the same as the router ID. If a router is to be a route reflector, then a single cluster ID should be selected and configured on all route reflectors in the cluster. If there is only one route reflector in the cluster, the cluster ID setting can be omitted because the default will suffice. The only constraints on the choice of cluster ID are the following:

  • IDs of clusters within an AS must be unique within that AS.
  • The cluster ID must not be 0.0.0.0

Example

The following example configures a cluster ID of 1.2.3.4 for AS 65151:

System(su-config)->router bgp 65151
System(su-config-bgp)->bgp router-id 151.1.1.9
System(su-config-bgp)->bgp cluster-id 1.2.3.4
System(su-config-bgp)->