RE: IPv6: IS-IS or OSPFv3

["TJ" <trejrco () gmail com>]

> > as one who has been burned when topologies are not congruent, i gotta
> > ask.  if i do not anticipate v4 and v6 having different topologies,
> > and all my devices are dual-capable, would you still recommend mt for
> > other than future-proofing?
>
> In practice, we realized that enabling IS-ISv6 on interfaces already
running
> IS-ISv4 was problematic without MT pre- configured.
>
> Those links surely lost IS-IS adjacency which threatened stability of the
> network.

Yup, that is the rub: if rolling out your v6 routing impacts your v4 routing
you are not "winning".


/TJ