[Softwires] Comments on divi-pd

Washam Fan <washam.fan@gmail.com> Mon, 31 October 2011 05:36 UTC

Return-Path: <washam.fan@gmail.com>
X-Original-To: softwires@ietfa.amsl.com
Delivered-To: softwires@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B584B21F8C79 for <softwires@ietfa.amsl.com>; Sun, 30 Oct 2011 22:36:06 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.549
X-Spam-Level:
X-Spam-Status: No, score=-3.549 tagged_above=-999 required=5 tests=[AWL=0.050, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3gT0lC8xB+Gc for <softwires@ietfa.amsl.com>; Sun, 30 Oct 2011 22:36:05 -0700 (PDT)
Received: from mail-wy0-f172.google.com (mail-wy0-f172.google.com [74.125.82.172]) by ietfa.amsl.com (Postfix) with ESMTP id A330421F8C6D for <softwires@ietf.org>; Sun, 30 Oct 2011 22:36:05 -0700 (PDT)
Received: by wyg30 with SMTP id 30so829134wyg.31 for <softwires@ietf.org>; Sun, 30 Oct 2011 22:36:04 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=3kjOLXpD3fH+gM2UNxmW9SbTXBo4fJuG3gulehUHrbU=; b=GRA4YECt/H/3WmWkd5a6u9K44g7qmdM8Ih1xgfhHU/Gyi5JRCE/ep49XfzuEkLSwA6 vKefhasAiYtr1htcQoeSNC2yuk9Kbk8ME7Uifk97wXjS+NmInjiNQx5z3amb48Tfvt2w 1oJAcEMKbFc1XNwG3B+m9ZiIkgX3aSforUrU8=
MIME-Version: 1.0
Received: by 10.216.163.194 with SMTP id a44mr3903328wel.1.1320039364838; Sun, 30 Oct 2011 22:36:04 -0700 (PDT)
Received: by 10.216.85.4 with HTTP; Sun, 30 Oct 2011 22:36:04 -0700 (PDT)
Date: Mon, 31 Oct 2011 13:36:04 +0800
Message-ID: <CAAuHL_Cc34o56ytVO4k3cvJT_oi1c5AyoYF7QY1=ZN=yQK1euA@mail.gmail.com>
From: Washam Fan <washam.fan@gmail.com>
To: Softwires <softwires@ietf.org>
Content-Type: text/plain; charset="ISO-8859-1"
Subject: [Softwires] Comments on divi-pd
X-BeenThere: softwires@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: softwires wg discussion list <softwires.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/softwires>, <mailto:softwires-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/softwires>
List-Post: <mailto:softwires@ietf.org>
List-Help: <mailto:softwires-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/softwires>, <mailto:softwires-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 31 Oct 2011 05:36:06 -0000

Hi the authors,

I have 2 comments on this draft so far.

1. Appendix A gives an example how to generate a IPv4-translatable
address delegated to a CPE, but miss the part how a CPE derive a IPv4
prefix, address, or shared address from a given delegated
IPv4-translatable address. At least, I think the s bits can not be
derived without extra provisioning.

2. It seems to me native IPv6 addresses and IPv4-translatable
addresses share the same prefix. Then how a CPE identify a IPv6 packet
arriving at the WAN-facing interface is a native one or a translated
one?

Thanks,
washam