Re: [Idr] Review of draft-ietf-large-community-06.txt

Geoff Huston <gih@apnic.net> Fri, 04 November 2016 01:25 UTC

Return-Path: <gih@apnic.net>
X-Original-To: idr@ietfa.amsl.com
Delivered-To: idr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3D2DF129699 for <idr@ietfa.amsl.com>; Thu, 3 Nov 2016 18:25:16 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -108.398
X-Spam-Level:
X-Spam-Status: No, score=-108.398 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-1.497, SPF_PASS=-0.001, USER_IN_WHITELIST=-100] autolearn=unavailable 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 n-3er6v3JvYo for <idr@ietfa.amsl.com>; Thu, 3 Nov 2016 18:25:14 -0700 (PDT)
Received: from ao-mailgw.apnic.net (ao-mailgw.apnic.net [IPv6:2001:dd8:8:701::25]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A7D121296A3 for <idr@ietf.org>; Thu, 3 Nov 2016 18:25:13 -0700 (PDT)
Received: from nxmda2.org.apnic.net (unknown [2001:dd8:9:2::101:249]) by ao-mailgw.apnic.net (Halon) with ESMTPS id 85a35a96-a22d-11e6-b8ce-005056b6ee6f; Fri, 04 Nov 2016 11:25:08 +1000 (AEST)
Received: from [202.158.221.23] (203.119.101.249) by NXMDA2.org.apnic.net (203.119.107.21) with Microsoft SMTP Server (TLS) id 14.3.123.3; Fri, 4 Nov 2016 11:24:52 +1000
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0 (Mac OS X Mail 10.1 \(3251\))
From: Geoff Huston <gih@apnic.net>
In-Reply-To: <20161104004725.GC17584@shrubbery.net>
Date: Fri, 04 Nov 2016 12:25:08 +1100
Content-Transfer-Encoding: quoted-printable
Message-ID: <DC44C8AC-F10A-4D6A-914A-EFD54A9B3888@apnic.net>
References: <112dc01d235fd$57f9c370$07ed4a50$@ndzh.com> <C2DABF02-D3CB-4646-B869-FBCE5F05FDA1@apnic.net> <117ea01d23611$a28513e0$e78f3ba0$@ndzh.com> <CED07D95-A426-469C-85B4-DB2FBE52D14A@apnic.net> <20161104004725.GC17584@shrubbery.net>
To: heasley <heas@shrubbery.net>
X-Mailer: Apple Mail (2.3251)
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/J8by29DKF2ObCsoooM28UIMGA40>
Cc: IETF IDR WG <idr@ietf.org>, Susan Hares <shares@ndzh.com>, rtg-dir@ietf.org
Subject: Re: [Idr] Review of draft-ietf-large-community-06.txt
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: Inter-Domain Routing <idr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/idr>, <mailto:idr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/idr/>
List-Post: <mailto:idr@ietf.org>
List-Help: <mailto:idr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/idr>, <mailto:idr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Nov 2016 01:25:16 -0000

> On 4 Nov. 2016, at 11:47 am, heasley <heas@shrubbery.net> wrote:
> 
> 
>> 7. ----------------
>> 
>> 4.  Canonical Representation
>> 
>> I am confused here - this section used an example with TWO canonical
>> representations:
>> 
>>   "For example: 64496:4294967295:2, 64496:0:0, or (64496, 111, 222)."
>> 
>> 
>> Conventionally, it's better to use a single canonical representation, so the
>> authors should pick either a colon-delimited list, or a bracketed comma+space
>> separated object.
> 
> Are you sure; a separator is not defined in the text.

If the “Canonical Representation” is to represent the Large Communities Attributes value 
as a sequence of triplets, where the triplet is three unsigned decimal values, but not to
define the representation of the delimiter between the elements of the triplet, nor the delineator
between successive triplets, then I think that this is an incomplete canonical
representation.

cheers,

  Geoff