04-12-2018 04:22 AM - edited 03-01-2019 03:23 PM
I'm having a problem bringing BFD session up with the below scenario :
having a cisco 7600 router as a CE router, dual homed to two ASR9K routers acting as PE routers ( MC-LAG-Decoupled Mode )
static routing is the IGP in use between C7600 & both ASR9K router, VRRP is configured between the PE routers, C7600 is pointing to next-hop VRRP IP , bfd session should be running with the destination IP address of the VRRP IP.
The problem is both ASR9K routers negotiating BFD session using the source IP address of the BVI interface in use, i can't source the BFD session with the VRRP IP address which is impacting the BFD session & it is always in the down state.
Any advice for a solution for that topology ?
04-12-2018 07:36 AM
BFD cannot use the VRRP IP address as source because VRRP is a client of BFD (or at least it can be if configured that way).
If you have static routing on the c7600 side, why do you need BFD with the next-hop router? Is there an alternative path from the c7600 in case both asr9k are down?
04-19-2018 02:49 PM
Thanks Aleksandar for your reply,
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