bgp failover question , igp is eigrp

[gavin han]

Hi All,

as shown in below diagram. I have to configure where traffic will automatically failover if link goes down. A-R2 <->B-R2 link as to be primary. if that link goes down than traffic should automatically failover to A-R1 <->B-R1 link. once A-R2 <->B-R2 link is back up then traffic should flow through A-R2 <->B-R2 link. how to accomplish this? B-R1 and B-R2 are running eigrp as well, so bgp routes are redistributed into eigrp. bgp admin distance is set to 200 200 200 for internal, external routes. how to accomplish this failover?

[gavin han]

could someone advise please? how to configure it so that routes through B-R2 will always be preferred? if B-R2 goes down then traffic would failover to B-R1 but traffic should failback to B-R2 as soon as B-R2 comes back up. how to accomplish this? please help.

[Francesco Molino]

Hi

You want that B-R2 is selected as default part from other eigrp peers? If yes when redistributing bgp routed into eigrp setup a preferred metric on b-r2 than b-r1. All eigrp peers will take this path instead the other. If b-r2 goes down then the path will be through b-r1.

Could you take 1 subnet that both bgp are redistributing into eigrp and on 1 of the other eigrp peer do the following (paste please the output): 

- sh ip route of that subnet

- sh ip eigrp topology of that subnet

Thanks

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