Re: IID length text

Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 23 January 2017 19:33 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 79D031297CF for <ipv6@ietfa.amsl.com>; Mon, 23 Jan 2017 11:33:39 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 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] 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 BFj9tx_sQwv5 for <ipv6@ietfa.amsl.com>; Mon, 23 Jan 2017 11:33:38 -0800 (PST)
Received: from mail-pg0-x22f.google.com (mail-pg0-x22f.google.com [IPv6:2607:f8b0:400e:c05::22f]) (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 2A7A21297CE for <ipv6@ietf.org>; Mon, 23 Jan 2017 11:33:38 -0800 (PST)
Received: by mail-pg0-x22f.google.com with SMTP id 14so47302773pgg.1 for <ipv6@ietf.org>; Mon, 23 Jan 2017 11:33:38 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:organization:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding; bh=0BXc8pbDg2KSaB793Et4w6IwJOqnikEEiZzI82acagM=; b=hVUL1Ljsk3WrJqrZzfxlnLoJ8KKKKQdcvqkUziI+FP33e7Ng5CcNWJGmU/17YfBGu1 9Dl4gfuLZweTcaSHQ7n865JOJk+gBMpFObv8BCxjlt0sSIwNsYf1sIxE7F+rVwsy2KVI lHIv6IpTUHvGyXzTNXgE6TUsDcIE8sIgMcKlmcTAHqXpzx+qHqZP+MQEArEHI0FDVSWS ldE2tDzfB6vYlzLioq5hCUKsQKsZvcCP9clRb3gTc0VE04HPe+U1Be88soGS9nM4bwJ4 JMBo5czNtfYOYuOLsQkGeZrTiYIV8xaF31eo3KrcWMbHEmDoNL661kO1BS9gvBHh4/zM HRvQ==
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:from:organization :message-id:date:user-agent:mime-version:in-reply-to :content-transfer-encoding; bh=0BXc8pbDg2KSaB793Et4w6IwJOqnikEEiZzI82acagM=; b=BQ8nIc2GcNcMgFX2Y12ydQN0rmRBrRQcBvrHhxY/pmDphKwLZcgP/CGaRlIci3yFx5 gxK7QtMh5lqp2bj1W+ZRG4B13dLA+mBMT1ARu8S3R27a1TEsRbT6pYsP2oXxER+ZZ3+G R4rcG5Zznv2AIs8mskv6ozMEw/f2Ci5OLKsR9srZOf+0GLtDf5TpMcZBNZBD5G2G+W06 S179Q+nyYyCy9JXL5FwDdxa5wNoo0fwCFLsoenNtRRlwrMWPfJPdM66yn1WHBSqLWk0O SGmxRsV3xmrCAnIezk4LD2Tglxa5YudFh4ItmNnj1AR05Edro/FT69yj44HE1zzcn+2Z Gx0Q==
X-Gm-Message-State: AIkVDXIwzQNctKGKY2nNVFdRF+jRKQsPI+/7bFqWEQX1HDaFP3uaf80KCdG0WMWNoHqbqw==
X-Received: by 10.84.211.137 with SMTP id c9mr44887940pli.8.1485200017536; Mon, 23 Jan 2017 11:33:37 -0800 (PST)
Received: from ?IPv6:2406:e007:6c0c:1:28cc:dc4c:9703:6781? ([2406:e007:6c0c:1:28cc:dc4c:9703:6781]) by smtp.gmail.com with ESMTPSA id p2sm39105211pgd.17.2017.01.23.11.33.35 for <ipv6@ietf.org> (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Jan 2017 11:33:36 -0800 (PST)
Subject: Re: IID length text
To: ipv6@ietf.org
References: <20170123124954.13329c33@echo.ms.redpill-linpro.com> <CAKD1Yr2jFf=OFiCJLWV48FRZF1iuWK1mLJ9+kQiuFBxujgCOBQ@mail.gmail.com> <20170123150743.6960611b@envy.e1.y.home> <20170123.163609.74661096.sthaug@nethelp.no>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <e5acd125-7d48-c9c1-9ac7-c8ff4da7c8a0@gmail.com>
Date: Tue, 24 Jan 2017 08:33:37 +1300
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0
MIME-Version: 1.0
In-Reply-To: <20170123.163609.74661096.sthaug@nethelp.no>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/oKhttFTxA-WaTXVhv5rjN8YNLFQ>
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, 23 Jan 2017 19:33:39 -0000

On 24/01/2017 04:36, sthaug@nethelp.no wrote:
>>> the interface ID isn't really an ID any more.
>>
>> I suppose you can look at it that way too...but wouldn't that then mean
>> that you're essentially saying that you can have whatever amount of
>> suffix/node/host bits in an IPv6 address you'd like, but you're only
>> allowed to call it an «IID» if it just so happens to be exactly 64 of
>> them? :-)
> 
> Isn't that how IPv6 is sometimes used in the real world? E.g. transit
> providers who insist on a non-64 bit mask on the transit links.
> 
> Anybody who believes that only /64 (and /127) is in use on interfaces
> in the real world is seriously deluded.

Indeed. But I think the point has been hammered home and I expect that
the draft will be wordsmithed accordingly before we see a new version.

   Brian