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How to configure multihomed with static route backup on XR PE?

From diagram in attach file, when the main link down the static can backup but when the main link came up again the routes don't change back to the OSPF main link.

 

RP/0/RSP0/CPU0:.122#sho ip rou vrf POC | inc 10.241.143
Mon Mar 30 15:58:31.214 BKK
B 10.241.143.0/24 [200/2] via x.x.0.44 (nexthop in vrf default), 00:05:41

 

RP/0/RSP0/CPU0:.122#sho ip rou vrf POC | inc 10.241.143
Mon Mar 30 15:58:54.419 BKK
S 10.241.143.0/24 [254/0] via 10.241.144.1, 00:00:18

 

RP/0/RSP0/CPU0:.122#show bgp vpnv4 uni vrf POC
Mon Mar 30 17:00:55.262 BKK
Network Next Hop Metric LocPrf Weight Path
*> 10.241.143.0/24 10.241.144.1 0 32768 ?
 

How should I do?

2 REPLIES 2
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Enthusiast

what version code are you running?and Box?

Please mark it helpfull if it was the case, and i have this problem too. Double touchdown is amazing. Thanks to make Engineering easy.
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it might also be important to look at the cef traces and cef events why it skipped processing the BGP update.

technically, with floating static like you have it should just work like you describe, but there may be a criteria met that prevented the bgp link to come back in as perferred path.

show cef table events would help here, also look at the bgp prefix update time and correlate that to the cef event.

looking at the bare outputs you have there I think the crux is part of the fact that it looks like your OSPF next hop is recursive (with nh in different vrf) and the static is non recursive (next hop in same vrf).

that could mean that the cef didn't collapse properly after this event as normally for primary and backup paths they need to have the same route depth (recursions). but it could be something also that rcochenos is alluding to in terms of a bug, hence release may matter here.

would first fix the recursion and looking at the table events for clues.

xander