Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard

Randy Bush <randy@psg.com> Sat, 11 February 2017 03:23 UTC

Return-Path: <randy@psg.com>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BC873129650 for <ietf@ietfa.amsl.com>; Fri, 10 Feb 2017 19:23:15 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.902
X-Spam-Level:
X-Spam-Status: No, score=-6.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qWU4FmFi-y2m for <ietf@ietfa.amsl.com>; Fri, 10 Feb 2017 19:23:15 -0800 (PST)
Received: from ran.psg.com (ran.psg.com [IPv6:2001:418:8006::18]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id CFAE812963A for <ietf@ietf.org>; Fri, 10 Feb 2017 19:23:14 -0800 (PST)
Received: from localhost ([127.0.0.1] helo=ryuu.psg.com) by ran.psg.com with esmtp (Exim 4.86_2) (envelope-from <randy@psg.com>) id 1ccOHI-0007xQ-NN; Sat, 11 Feb 2017 03:23:13 +0000
Date: Sat, 11 Feb 2017 12:23:10 +0900
Message-ID: <m2o9y9pg0x.wl-randy@psg.com>
From: Randy Bush <randy@psg.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Subject: Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard
In-Reply-To: <13830253-67ab-cb26-4fa0-f40a24f1a5bc@gmail.com>
References: <148599296506.18647.12389618334616420462.idtracker@ietfa.amsl.com> <30725d25-9829-bf50-23c6-9e1b757e5cba@si6networks.com> <7ee506c2-4213-9396-186a-2b742c32f93b@gmail.com> <EA7E5B60-F136-47C6-949C-D123FB8DA70E@cisco.com> <00af01d27e11$fe539500$4001a8c0@gateway.2wire.net> <60F01869-8B32-46D3-80B1-A140DF1DDA8A@employees.org> <8D401C5B-C3C3-4378-9DFA-BF4ACC8E9DAF@qti.qualcomm.com> <D2D907D5-84B4-43BB-9103-F87DA9F122EB@employees.org> <33DC7B74-D240-4FF2-A8FF-C9C5A66809EE@qti.qualcomm.com> <1179DE45-3971-44A1-9630-28F76D2D652D@employees.org> <2ea64b3c-d69d-6b6c-cb04-fe63727a8bee@si6networks.com> <23C46409-337C-468D-BCDC-34027BB56CAD@employees.org> <30715b9e-e9b7-320e-f9e2-fc3f64615d5c@si6networks.com> <CAJE_bqcKu1XVQOPzcd+8b68WcQyjH9QmszaSvKWhT8SvHJ0ppg@mail.gmail.com> <m2y3xdpmjd.wl-randy@psg.com> <5333378B-0F8D-4966-82B2-DFF9639CEC7D@fugue.com> <3a180e40-936b-956b-9fc3-5ecdd4d905ee@gmail.com> <m2poippisc.wl-randy@psg.com> <13830253-67ab-cb26-4fa0-f40a24f1a5bc@gmail.com>
User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/24.5 Mule/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset=US-ASCII
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/vTwygu8JgJwOU9pUxKZMYwc1y5A>
Cc: IETF discussion list <ietf@ietf.org>
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf/>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 11 Feb 2017 03:23:16 -0000

just to get down a level from meta-

> If the right answer is to allow packet modifications that break PMTUD
> and IPsec/AH, let's do it, but let's also say we're doing it.

obvious imiho

> I happen to think it's the wrong answer, but that's my problem.

i share it, but this is at the border of my expertise.  i have this
fantasy of pmtu actually working before i retire.  i realize it is
unrealistic.

> Leaving the text open to interpretation would make a mockery of
> promoting it to Standard.

agree.  but v6 specs seem to like wussing out and leaving the
opportunity to do wrong things.  i'll bet you a reuben at the corned
beef factory in chicago that the next try at the addressing architecture
still does not *unambiguously* state cidr except for slaac.

randy