[ipv6-wg] Last Call (20101117): Requirements For IPv6 in ICT Equipment

On Wednesday, November 10, 2010 04:08:42 pm Ivan Pepelnjak 
wrote:

> MT IS-IS & MPLS
> ===============
> There's another gotcha that we totally missed: MT for
> IS-IS (RFC 5120) should be mentioned and it should be
> MANDATORY in combination with MPLS (otherwise you might
> experience some weird symptoms if you decide to run some
> IPv6 natively).

Apologies for the late reply:

I think it would be a good idea to recommend MT regardless 
of whether MPLS is in use or not.

Some systems, by default, will enable IS-IS for both v4 and 
v6 when turned on, e.g., JUNOS. Others won't and require 
either v4 or v6 support to be enabled explicitly, e.g., IOS.

I think recommending MT be supported in all implementations 
of IS-IS is useful, so that native/dual-stack deployments of 
v6 don't cause network outages due to lack of topology 
congruency during turn-up.

Cheers,

Mark.
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