Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 13 February 2017 22:53 UTC

Return-Path: <brian.e.carpenter@gmail.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8B5521299D5; Mon, 13 Feb 2017 14:53:57 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 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_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=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 IlnWNx05BuUm; Mon, 13 Feb 2017 14:53:55 -0800 (PST)
Received: from mail-ot0-x242.google.com (mail-ot0-x242.google.com [IPv6:2607:f8b0:4003:c0f::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 9C196129453; Mon, 13 Feb 2017 14:53:55 -0800 (PST)
Received: by mail-ot0-x242.google.com with SMTP id 73so13963127otj.1; Mon, 13 Feb 2017 14:53:55 -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=4Rv5f+XTTIu+WHVC+KzOSqgTeJM7NZ/Rzpcnc+r12wo=; b=lBs6Xtz5CJCyt813lqGDCnqNjpJNwOulbhLOkxBAiOWQyXXlwO4CY3Qpj+72GTWyVv H2IjoT0NAPD6mM7lhN5LTTUJgaq+vvJUeu3Q6jmiqYVQhfPgiK3K+HETvmPmdQgfJmor mfltYbZkfeUmoPYd31xnVQxRp7xvko9+Y3oWJI3Py2bJvTezaRVDctsm6YsiIpGbMNVh 34Sxx16t2/khL7M+DzKEpn4sehzJM4cXYG4KbdCaDZ9STKKWZd8N4N2+QeNhp5DdABmD ow0s+/4t8VdH2/SojIUF1FjRWJivPifLcFFkTOD75oE4loumaKBxS/oYU7RE1SaOIMIf 1Qqw==
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=4Rv5f+XTTIu+WHVC+KzOSqgTeJM7NZ/Rzpcnc+r12wo=; b=ak8kKq/tVqzWmBntciFbvrnxQKdlVxgp/ABjZsXRSSylSqebsVXDMWRuBeeN6+wcbE YkwPmZElgO3oyxllbUMKTpCncpX4PMB9HOI42f7RhJ2Xpw8D/ca45xemSd0StIynjXoL sjUidWRTa6zMLW/7FXJ1vlP2T62Jh1otrFDhj+Zca4xSI7uRKbPTYn7qapLYwCy5aQ09 Xu6EwDXSrH9IMh7qo1GCkkarOeqdVZcHd3JQHGt/w6+0S4/Iklc+Ktx1WX4OE8eWbHho 5c3athlAE5UI7nR3K8qcfMbKnpUY/2RZG2uuImonxmQ7BBm7nCo7XhIGdbP3ABkpOggh Q/+Q==
X-Gm-Message-State: AMke39nP+M0D5GNCRLJmtYE4nrWgQtdGGMlCyLd7VF6vHdUIzLPapl2xKqmRJn41CXj0og==
X-Received: by 10.98.89.195 with SMTP id k64mr28181611pfj.126.1487026434927; Mon, 13 Feb 2017 14:53:54 -0800 (PST)
Received: from [130.216.38.149] (sc-cs-567-laptop.uoa.auckland.ac.nz. [130.216.38.149]) by smtp.gmail.com with ESMTPSA id u14sm22813125pfg.18.2017.02.13.14.53.51 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 Feb 2017 14:53:54 -0800 (PST)
Subject: Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard
To: David Farmer <farmer@umn.edu>, IETF-Discussion Discussion <ietf@ietf.org>
References: <148599306190.18700.14784486605754128729.idtracker@ietfa.amsl.com> <CAN-Dau0kDiSNXsyq9-xEdS5mzLt-K+MYHqoV8aC8jDVREw8OPQ@mail.gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <8e5c950a-0957-4323-670f-f3d07f40b4df@gmail.com>
Date: Tue, 14 Feb 2017 11:53:51 +1300
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1
MIME-Version: 1.0
In-Reply-To: <CAN-Dau0kDiSNXsyq9-xEdS5mzLt-K+MYHqoV8aC8jDVREw8OPQ@mail.gmail.com>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/kF-Q8RaWlqgsXTk6Hc90UiaPvjU>
Cc: draft-ietf-6man-rfc4291bis@ietf.org, 6man WG <ipv6@ietf.org>, Suresh Krishnan <suresh.krishnan@ericsson.com>, 6man-chairs@ietf.org
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Feb 2017 22:53:57 -0000

At an earlier stage I suggested restricting the applicability
of the "However..." sentence to SLAAC [RFC4862]. A short way
of doing this would be

However, the Interface ID of unicast addresses used for
Stateless Address Autoconfiguration [RFC4862] is required
to be 64 bits long.

Regards
   Brian

On 14/02/2017 11:32, David Farmer wrote:
> I have concerns with the following text;
> 
>    IPv6 unicast routing is based on prefixes of any valid length up to
>    128 [BCP198].  For example, [RFC6164] standardises 127 bit prefixes
>    on inter-router point-to-point links. However, the Interface ID of
>    all unicast addresses, except those that start with the binary value
>    000, is required to be 64 bits long.  The rationale for the 64 bit
>    boundary in IPv6 addresses can be found in [RFC7421]
> 
> The third sentence seems to limit exceptions to 64 bit IIDs to exclusively
> addresses that start with binary vale of 000.  There are at least two other
> exceptions from standards track RFCs, that should be more clear accounted
> for in this text.  First is [RFC6164] point-to-point links, as mentioned in
> the previous sentence.  I think the clear intent of [RFC6164] is to allow
> one(1) Bit IIDs for point to point-to-point links using any Global Unicast
> Address, not just those that start with 000.  Second is, [RFC6052], which
> updates [RFC4921] and seems to allow 32 bit IIDs or /96 prefixes for any
> Global Unicast Address when used for IPv4/IPv6 translation, referred to as
> ""Network-Specific Prefix" unique to the organization deploying the address
> translators," in section 2.2 of [RFC6052].
> 
> Thanks.
> 
> On Wed, Feb 1, 2017 at 5:51 PM, The IESG <iesg-secretary@ietf.org>; wrote:
> 
>>
>> The IESG has received a request from the IPv6 Maintenance WG (6man) to
>> consider the following document:
>> - 'IP Version 6 Addressing Architecture'
>>   <draft-ietf-6man-rfc4291bis-07.txt> as Internet Standard
>>
>> The IESG plans to make a decision in the next few weeks, and solicits
>> final comments on this action. Please send substantive comments to the
>> ietf@ietf.org mailing lists by 2017-03-01. Exceptionally, comments may be
>> sent to iesg@ietf.org instead. In either case, please retain the
>> beginning of the Subject line to allow automated sorting.
>>
>> Abstract
>>
>>
>>    This specification defines the addressing architecture of the IP
>>    Version 6 (IPv6) protocol.  The document includes the IPv6 addressing
>>    model, text representations of IPv6 addresses, definition of IPv6
>>    unicast addresses, anycast addresses, and multicast addresses, and an
>>    IPv6 node's required addresses.
>>
>>    This document obsoletes RFC 4291, "IP Version 6 Addressing
>>    Architecture".
>>
>>
>>
>>
>> The file can be obtained via
>> https://datatracker.ietf.org/doc/draft-ietf-6man-rfc4291bis/
>>
>> IESG discussion can be tracked via
>> https://datatracker.ietf.org/doc/draft-ietf-6man-rfc4291bis/ballot/
>>
>>
>> No IPR declarations have been submitted directly on this I-D.
>>
>>
>>
>>
>> --------------------------------------------------------------------
>> IETF IPv6 working group mailing list
>> ipv6@ietf.org
>> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
>> --------------------------------------------------------------------
>>
> 
> 
> 
> 
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
>