[j-nsp] BFD Distributed Mode for IPv6

[James Bensley]

On Wed, 3 Oct 2018 at 10:13, Mark Tinka <mark.tinka at seacom.mu> wrote:
> On 3/Oct/18 11:09, adamv0025 at netconsultings.com wrote:
>
> If you'd have separate ISIS process for v6 would it be possible to spin up a
> separate/dedicated BFD process for that ISIS?

Unless I'm mistaken BFD isn't "multi-tenant", so only one set of BFD
packet exchanges can exist per-interface, there is no support for
multiple BFD session on the same interface (by which I mean layer 2
broadcast domain in the case of sub-interfaces). This kind of makes
sense as BFD is supposed to test for unidirectional communication
failure of the physical link (the fact that it runs in both directions
gives bidirectional failure detection). So we can run BFDv4 and/or
BFDv6 on an interface but only one instance per-interface otherwise
you'd need to negotiate different port numbers for the different
instances on the same interface?

Cheers,
James.