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Re: Deprecating IPv6 (Re: draft-bourbaki-6man-classless-ipv6-00)

Lorenzo Colitti <lorenzo@google.com> Mon, 05 June 2017 03:38 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Mon, 05 Jun 2017 12:38:07 +0900
Message-ID: <CAKD1Yr0d-BVeG6ceU=F4Jd864SFj6msofeOOi8GAcPxOLsA9dA@mail.gmail.com>
Subject: Re: Deprecating IPv6 (Re: draft-bourbaki-6man-classless-ipv6-00)
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: 6man <ipv6@ietf.org>, draft-bourbaki-6man-classless-ipv6@ietf.org
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On Sun, Jun 4, 2017 at 5:43 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> > If this proposal is accepted, then I think /120s will become the
> > defacto subnet size, despite what the draft says about /64s being the
> > recommended default.
>
> Predicting the future of complex systems is hard, but I think this
> prediction is wrong. There are some very strong arguments against
> prefixes that long, and it is the IPv6-over-foo specs that prevent
> such long prefixes being used.
>

None of which the people deploying /120s will understand or even be aware
of. Seriously: I've seen premier-grade IT departments - even in
well-funded, very technical companies with a very high hiring bar - deploy
NAT66 in their corporate networks without understanding that it would break
applications.

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