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BGP withdrawing the best path

I have a problem where the best path to a particular destination is being withdrawn by BGP. To explain. Site A has 2 links to site B.  1 via an eBGP peer over MPLS,  2 via an iBGP peer over a VPN backup.

I have configured the ebgp peer with a higher weight so that it is preferred.

The problem is this. When the link to the ebgp peer goes down,  the link via the ibgp peer is preferred.When the link via the ebgp peer comes back up,  the route via the ebgp peer does not go back into the BGP table (in fact it goes back for a second and is then withdrawn).

Could someone help me on this one.

Tagged as: BGP table , BGP withdrawing the best path , ebgp peer

Source: http://www.networkingblog.in

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