HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Routing Confi - Page 138
Confederation, Network diagram for a route reflector
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Figure 55 Network diagram for a route reflector The route reflector and clients form a cluster. In some cases, you can configure more than one route reflector in a cluster to improve network reliability and prevent a single point of failure, as shown in the following figure. The configured route reflectors must have the same Cluster_ID in order to avoid routing loops. Figure 56 Network diagram for route reflectors When the BGP routers in an AS are fully meshed, route reflection is unnecessary because it consumes more bandwidth resources. You can use related commands to disable route reflection. NOTE: After route reflection is disabled between clients, routes can still be reflected between a client and a non-client. Confederation Confederation is another method to manage growing IBGP connections in ASs. This method splits an AS into multiple sub-ASs. In each sub-AS, IBGP peers are fully meshed, and, as shown in Figure 57, intra-confederation EBGP connections are established between sub-ASs. 128
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