[v6ops] Adam Roach's No Objection on draft-ietf-v6ops-v4v6-xlat-prefix-02: (with COMMENT)

Adam Roach <adam@nostrum.com> Wed, 21 June 2017 22:17 UTC

MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
From: Adam Roach <adam@nostrum.com>
To: The IESG <iesg@ietf.org>
Cc: draft-ietf-v6ops-v4v6-xlat-prefix@ietf.org, Fred Baker <fredbaker.ietf@gmail.com>, draft-ietf-v6ops-v4v6-xlat-prefix.all@ietf.org, v6ops-chairs@ietf.org, fredbaker.ietf@gmail.com, v6ops@ietf.org
Auto-Submitted: auto-generated
Precedence: bulk
Message-ID: <149808345864.30641.6438936935007419889.idtracker@ietfa.amsl.com>
Date: Wed, 21 Jun 2017 15:17:38 -0700
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/ISL8MMtXQUnz8sOWFHViydYFYig>
Subject: [v6ops] Adam Roach's No Objection on draft-ietf-v6ops-v4v6-xlat-prefix-02: (with COMMENT)

Adam Roach has entered the following ballot position for
draft-ietf-v6ops-v4v6-xlat-prefix-02: No Objection

When responding, please keep the subject line intact and reply to all
email addresses included in the To and CC lines. (Feel free to cut this
introductory paragraph, however.)


Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
for more information about IESG DISCUSS and COMMENT positions.


The document, along with other ballot positions, can be found here:
https://datatracker.ietf.org/doc/draft-ietf-v6ops-v4v6-xlat-prefix/



----------------------------------------------------------------------
COMMENT:
----------------------------------------------------------------------

Like Suresh, I really appreciated the discussion of rationale in section 4.
There is one possibility that I'm surprised is not discussed; namely,
allocating 64::ff9b::/48 for this purpose, with the subset of addresses in
64::ff9b::/96 being *additionally* subject to the restrictions of RFC 6052.
This would seem to have the advantages of:

- Complete address adjacency without the disadvantages of using
64:ff9a:ffff::/48 - Sharing an even longer prefix (48 bits) than the 31-bit and
47-bit prefixes discussed in the document - Eliminating the caveat described in
the final paragraph of section 5 entirely

This is obvious enough that it had to be considered and rejected by the WG;
including the rationale for rejecting it seems appropriate here.

[v6ops] Adam Roach's No Objection on draft-ietf-v… Adam Roach