Running BFD between 2 direct Nexus 9k switches

[Rajeeradan]

Gentlemen,

I see the reason to run BFD between 2 N9k switches which are connected by a Layer 2 switch. But do you see a reason to run BFD between couple of Nexus 9k switches that are directly connected?(We are running BGP in between them)

[M02@rt37]

Hello @Rajeeradan 

Yes, there can be a reason to run BFD between directly connected Nexus 9k switches that are running BGP. BFD can provide faster detection and recovery time in case of a link or peer failure.

BGP has its own mechanism to detect a failure and converge the routing table, but it may take several seconds or even minutes, depending on the BGP timers and the size of the routing table. BFD, on the other hand, can detect a failure in milliseconds and trigger the BGP protocol to reconverge the routes immediately.

By running BFD between the Nexus 9k switches, you can ensure faster failure detection and recovery, which can improve the overall network performance and availability.