BGP multihoming failover

[admin_2]

I have implemented BGP multihoming using 2 7200VXR routers and HSRP in the ineer side. Every thing is working right but i want to implement a failover mechanisum for my ethernet(inner)interfaces.

What i want is that if one of the inner int on the router fails then the router should be able to inform its bgp neighbour to send traffic back to it through the other router.

I have implemented the failover provided when one of the uplink fails but i am not able to get any docs on the above problem.

Please suggest

[tbaranski]

The exact solution will depend on your topology. But in general BGP should be advertising routes that point out the internal interface. So when the internal interface goes down, the routes are removed from the routing table and BGP therefore stops advertising them.

[ruwhite]

It sounds like what you want is for the BGP router to stop advertising your routes to its peer if one of its inside links fails (?). If this is so, there are a couple of solutions.

I don't know how you're advertising your routes at this point on the BGP side, but you could use a static, and point the static to some next hop on the inside interface, then redistribute the static or use a network statement in BGP ro advertise your route. This way, if the inside interface fails, the static will fall out of the local routing table, and BGP still stop advertising it.

If there are more than one inside interface you need to track, or you don't want to set your next hop this way, then conditional advertisement is going to be your best bet.

http://www.cisco.com/en/US/tech/tk365/tk80/technologies_configuration_example09186a0080094309.shtml

:-)

Russ.W