Re: [v6ops] draft-ietf-v6ops-enterprise-incremental-ipv6 WGLC

Lorenzo Colitti <lorenzo@google.com> Mon, 05 August 2013 01:35 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Mon, 5 Aug 2013 10:34:43 +0900
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To: Fred Baker <fred@cisco.com>
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Cc: "v6ops@ietf.org WG" <v6ops@ietf.org>
Subject: Re: [v6ops] draft-ietf-v6ops-enterprise-incremental-ipv6 WGLC
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On Mon, Aug 5, 2013 at 3:00 AM, Fred Baker <fred@cisco.com> wrote:

> This is to initiate a two week working group last call of
> http://tools.ietf.org/html/draft-ietf-v6ops-enterprise-incremental-ipv6.
>  Please read it now. If you find nits
> (spelling errors, minor suggested wording changes, etc), comment to the
> authors; if you find greater issues, such as disagreeing with a
> statement or finding additional issues that need to be addressed,
> please post your comments to the list.
>

As stated at the mike, I think all mention of ULA+NPT66 should be removed,
because:

   1. AFAIK this is not a scenario that is specified in any RFC, and it is
   not appropriate to introduce it here in passing, since this document is
   only tangential to ULAs.
   2. This working group is also discussing this same question - with a
   fair amount of controversy - in the ULA usage draft. That discussion should
   be held in only one place and should not hold up this document.
   3. There is zero or near-zero experience of this deployment model. The
   authors did not appear to be aware of any deployments that actually used
   this model. Also, RFC6724-compliant hosts will always prefer IPv4 over ULA,
   so they will in effect never use them at all; the fact that this is not
   mentioned in the draft suggests that nobody has actually done this.

If ULAs are to be cited in the draft, then they should be mentioned in the
context of the only scenarios currently specified by the IETF, either in
networks that are completely isolated or in conjunction with global
addresses.