Thursday, March 31, 2011

Cisco Router BGP Configuration Example

You will need to use BGP to connect to most MPLS carriers or if you have two Internet providers and want to multi-home.

(Note: private ASN range is 64512 to 65534)

In this example eBGP is configured to the provider (, eigrp is redistributed into BGP, and iBGP is configured between to 2 customer routers ( and .242).

router bgp 65511
no synchronization
bgp router-id (loopback0)
bgp log-neighbor-changes
network (propagate default route)
network mask (advertise customer to provider network)
redistribute eigrp 100 (redistribute eigrp into BGP)
neighbor remote-as 65511
neighbor update-source Loopback0
neighbor next-hop-self
neighbor remote-as 65401
no auto-summary

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