
Configuring and Customizing BGP
303528-A Rev 00
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Configuring Multiple RR Clusters in an AS
An AS can contain multiple IBGP route reflector clusters. In an AS with multiple
clusters:
• Each cluster has a unique ID.
• Within each cluster, RR clients are connected to RRs in a tree topology.
• Within the AS, clusters are connected in arbitrary topologies. (From the point
of view of the topology, a cluster is a mini-AS. Like an AS, a cluster can be
configured in an arbitrary way.)
You can use the BCC or Site Manager to perform the following operations:
• Associate a route reflector with a cluster.
• Establish a peer-to-peer session with a server in another cluster.
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