Bidirectional Forwarding Detection (BFD) Protocol Cheat Sheet

Hi,

Sorry for confusion and thanks for you patience. I will try to be more precise. Let's assume we have:

• Active-Standby cluster
• Each node is using different network patch (let's say switches) to reach router
• Route is configured with router IP
• BFD is configured to monitor this router

Then BFD on Active reports that router is down (in fast let's assume that some device in network path is down). As you said it means route is removed from routing table. That means no traffic will be send to this router but can it trigger failover or not really? So if BFD detects router down on Active that's it, removed from routing table and nothing more - means it can't be used to trigger failover, still functionalities like Gateway Failsfae or HA Group has to be configured?

Related to second part. I am talking about scenario when you have multiple static routes configured (no for redundancy) pointing to different routers via which different subnets can be reached. All of those are directing traffic via the same VLAN (maybe using same Floating IP) but targeting different routers - each being able to pass traffic to different subnet/IP.

Question was if i's possible to configure BFD to selectively detect failure of each router, so if only one router on given VLAN/Interface can be monitored or if you can set monitoring with every router IP and only failure of this specific router can be discovered - or it's all or nothing - one router IP per VLAN/Interface can be monitored.

Hope it makes any sense...

Piotr