BFD on back-to-back connected BGP-speakers

Saku Ytti saku at
Tue Nov 29 19:57:28 UTC 2016

On 29 November 2016 at 20:23, Hugo Slabbert <hugo at> wrote:


> - eBGP with peering to interface addresses (not loopback)
> - no multi-hop
> - direct back-to-back connections (no intermediate devices except patch
> panels)
> Possible failure scenarios where I could see this helping would be fat
> fingering (filters implemented on one or the other side drops traffic from
> the peer) or e.g. something catastrophic that causes the control plane to go
> away without any last gasp to the peer.
> Or is adding BFD into the mix in this type of setup getting into increasing
> effort/complexity (an additional protocol) for dimishing returns?

If you have HW liveliness detection and fast-failover, I think BFD
probably will just reduce availability due its failures being more
probable than the edge cases in your setup.
I personally would not run BFD here.


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