05-21-2014 09:25 AM - edited 03-04-2019 11:00 PM
Hi Champs,
we have configured BFD in multihoming scenario with BGP routing protocol.Timer configuration is bfd interval 100 min_rx 100 multiplier 5.
Failover from first ISP to second ISP takes 30 sec and same from first ISP to second ISP takes more than 1min. Can you suggest reason for different failver times and how can i have equal failover time from both ISP.How convergence time is calculated in BGP + BFD scenario?
Regards
V
05-21-2014 10:19 AM
Have you enabled bfd on bgp neighborship? I think the command is:
neighbor xxxx fall-over bfd
05-21-2014 10:25 AM
of course..its enabled
05-21-2014 01:50 PM
Vicky,
A simple topology would help better understand the scenario. Do you have both the ISP terminated on same router or different router?.
How many prefixes are you learning?. Full internet table or few prefixes?.
Accordingly, you can consider BGP PIC or best external to speed up the convergence.
-Nagendra
05-23-2014 01:03 AM
Hi ,
Links are terminating on different router and only defualt route is learning
enabled BGP multipath for lnk load sharing
thanks
05-23-2014 03:01 AM
Have you tried bfd fast-detect under BGP?
08-21-2014 05:47 AM
Does the ISP support BFD??
05-21-2014 04:31 PM
If its enabled, BGP neighborship should get teared up immediately after the bfd failure (about 500-600ms)...
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide