[j-nsp] BFD Distributed Mode for IPv6

[James Bensley]

On Tue, 2 Oct 2018 at 16:39, Mark Tinka <mark.tinka at seacom.mu> wrote:
> The real-world problem we are seeing is when, for whatever reason, the
> RE CPU spikes and BFD for IPv6 sneezes, we also lose IPv4 because, well,
> IS-IS integrates both IP protocols.

I presume that if one were to run MT-ISIS there would be no impact to IPv4?

> On 2/Oct/18 15:30, Виталий Венгловский wrote:
>
> > Mark,
> >
> > Not exactly your scenario but we had the same problems with eBGP with
> > IPv6 link-local addresses on QFX10K platform.
> > Dev Team had replied that rather than hardware limitation it's more of
> > a "design decision" to not distribute IPv6 LL BFD sessions on PFEs,
> > it's the same behaviour across the MX/QFX/PTX portfolio and there are
> > no plans to change it.

I'd be interested to know if BFD works OK if you use public IPv6
addresses for IS-IS adjacencies (although it's a waste of IPs, I'd
still be curious).

Cheers,
James (not currently near the lab).