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

Brian E Carpenter <brian.e.carpenter@gmail.com> Fri, 03 February 2017 00:37 UTC

Return-Path: <brian.e.carpenter@gmail.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 B6478129A42; Thu, 2 Feb 2017 16:37:42 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.7
X-Spam-Level:
X-Spam-Status: No, score=-2.7 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
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 VH4rClEGk1vJ; Thu, 2 Feb 2017 16:37:41 -0800 (PST)
Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (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 A7F781299F1; Thu, 2 Feb 2017 16:37:41 -0800 (PST)
Received: by mail-pf0-x242.google.com with SMTP id f144so288253pfa.2; Thu, 02 Feb 2017 16:37:41 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:cc:from:organization:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=kmRxbnBAxUXRGeuRCBw4ThRbxkANLNCkFlnF0viGqZo=; b=Zu8RwaJVWDx/a90Bb2KhO56ji8/04/WUkkbTXPgAJHVGMWrZmPqH6CUNb3weYZAzQq 5fqB7cnN6iBT8GD0Aau36SDJRH+I7yU0SLePTH9SD2+lXKvsthjTyXBAnMp+SMq/dazS LDFvdCw7q5EANJ5YjqaveUkcIhUAvDVxnjjAfqdnArekx4II8oPRiGaD/WkKUveuzCpJ kNA0CxLQC7Lg+GYc/wQJK9FcfxHj4fMdvmiKzbm7hGcvkUI+FnU6Y5Wimvv4Pa5IFWlg A7aDfhS9ZsY4wBy5lLsJSXlW1y7SgL03C6kx0Twe48fEV8U0i9jAQ8SCHNZx3mBe9vEa gMNQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding; bh=kmRxbnBAxUXRGeuRCBw4ThRbxkANLNCkFlnF0viGqZo=; b=uayZk1p7uvC8r3FY97r3HgxqpoNZpGmvgyGeODvjAwniRwnSlcr2CvUK8wiYq8Xreq WRSmP8yxJ/e0UFdw+6jWJrNlIhb8t2Qt/saIhgSS/rMUNYZR5C5ZJh0UVqSpMEsrTIjD Au0PM1//U++9SxKP4a5AgYZ5JUGIi9yUOQLS5XStX61kQ3hoVCZsjc0XsofWDn7Sw2PO kJ38Fza64YTgXYQbq36A4nPJE0KNRmFnFp0Uq6FlIigQl6jRycCTy6LrFqpJHVkjLOod ulmPYh6I0hBr0D4jWRWbsLQgi/ujnQrAU2mkB60/9X5JR8VIQbcfxaeFUrLyELKnrmTk yMvg==
X-Gm-Message-State: AIkVDXK1G1f5dsGJ+j/OPryaCrRza6xXUyR+CUbc7LsnyzH4tLJlD5hG9vqhoL3nGfkW9A==
X-Received: by 10.98.217.88 with SMTP id s85mr14259095pfg.167.1486082261041; Thu, 02 Feb 2017 16:37:41 -0800 (PST)
Received: from ?IPv6:2406:e007:7909:1:28cc:dc4c:9703:6781? ([2406:e007:7909:1:28cc:dc4c:9703:6781]) by smtp.gmail.com with ESMTPSA id l22sm61816540pgc.43.2017.02.02.16.37.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 02 Feb 2017 16:37:40 -0800 (PST)
Subject: Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard
To: ietf@ietf.org
References: <148599296506.18647.12389618334616420462.idtracker@ietfa.amsl.com> <30725d25-9829-bf50-23c6-9e1b757e5cba@si6networks.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <7ee506c2-4213-9396-186a-2b742c32f93b@gmail.com>
Date: Fri, 03 Feb 2017 13:37:45 +1300
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0
MIME-Version: 1.0
In-Reply-To: <30725d25-9829-bf50-23c6-9e1b757e5cba@si6networks.com>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/myyPO9b4dYfYeGQrdPjTNzIHArY>
Cc: draft-ietf-6man-rfc2460bis@tools.ietf.org, ipv6@ietf.org, 6man-chairs@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: Fri, 03 Feb 2017 00:37:43 -0000

In Section 4 ("IPv6 Extension Headers") the draft says:

>    With one exception, extension headers are not processed by any node
>    along a packet's delivery path, until the packet reaches the node (or
>    each of the set of nodes, in the case of multicast) identified in the
>    Destination Address field of the IPv6 header.

(FYI, the exception is the hop-by-hop extension header.)

I do not dispute that this sentence reached WG consensus. However, I want
to ask if it has IETF consensus. In my opinion, this sentence should read

   With one exception, extension headers are not processed, inserted,
   deleted or modified by any node along a packet's delivery path, until
   the packet reaches the node (or each of the set of nodes, in the case
   of multicast) identified in the Destination Address field of the IPv6
   header.

I believe this was always the intended meaning of the word "processed"
from the earliest design phase of IPv6, but some people have read this
text as allowing insertion, deletion or modification of headers. IMHO
it needs to be clarified.

Regards
   Brian Carpenter