BGP Notes – Route Reflectors

• Route reflectors remove the requirement of having a full mesh iBGP network.
• Any iBGP route a router reflector learns is sent to all route reflector clients.
  • Non-client iBGP neighbors do not get the new route per iBGP rules.
• RR clients are configured like normal iBGP routers.
  • All RR client config is done on the route reflector.
• RRs and clients are part of a cluster.
  • RRs in each cluster must be neighbors with each other.
  • Each cluster RR appends the cluster ID to the CLUSTER_ID PA; this is used similarly to AS_CONFED_SEQ.
• The ORIGINATOR_ID PA is set by and preserved by the RR.
  • If a route contains the ORIGINATOR_ID of the receiving router, the update is ignored.
• Only best routes are passed to RR clients and non-client neighbors.

router bgp 123
 no synchronization
 bgp cluster-id 1
 neighbor 6.6.6.6 remote-as 123
 neighbor 6.6.6.6 route-reflector-client

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jac

Aaron does lots of stuff and, therefore, does nothing well. He's trying, though.

https://masto.ai/@aconaway

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