Comments on: want a autofallback of link from bgp to ospf http://itknowledgeexchange.techtarget.com/itanswers/want-a-autofallback-of-link-from-bgp-to-ospf/ Sun, 19 May 2013 03:14:28 +0000 hourly 1 By: cisc0tech http://itknowledgeexchange.techtarget.com/itanswers/want-a-autofallback-of-link-from-bgp-to-ospf/#comment-108259 cisc0tech Fri, 08 Jun 2012 14:45:25 +0000 #comment-108259 Hi, if you have added static route on OSPF and will also add a static route on BGP means you are no more using OSPF/BGP for learning routes. This will work, but only for outgoing traffic. So basically you will end up with sending traffic via OSPF and receiving via BGP. Asymetric Routing.

I think you should try policy based routing.. something like modifying AD, try ‘distance’ command to decrease OSPF’s AD or increase BGP AD.

Search for IP SLA feature.. what you can do is on the BGP neighbor put a tracking for OSPF link, when the OSPF link goes down, IP SLA will bring up the BGP neighborship ;) but yes failover will take about 30-50 seconds as BGP takes time to form neighborship.

]]> By: santucci44 http://itknowledgeexchange.techtarget.com/itanswers/want-a-autofallback-of-link-from-bgp-to-ospf/#comment-107693 santucci44 Tue, 22 May 2012 16:31:18 +0000 #comment-107693 Create a second static route for the bgp link with the second best AD. Right now your eBGP has an AD of 170 and you iBGP has an AD of 200 which are the worst paths to take in the routers eyes. Your static routes have the best AD of 1, and in the eyes of the router, is the best and most believable path. You can also do some policy based routing to get it working.

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