IETF Logo Mail Archive

Re: [v6ops] [dhcwg] IPv6-Only Preferred DHCPv4 option

David Farmer <farmer@umn.edu> Thu, 05 December 2019 01:09 UTC

Return-Path: <farmer@umn.edu>
X-Original-To: v6ops@ietfa.amsl.com
Delivered-To: v6ops@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 71D68120935 for <v6ops@ietfa.amsl.com>; Wed, 4 Dec 2019 17:09:21 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.299
X-Spam-Level:
X-Spam-Status: No, score=-4.299 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=umn.edu
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 FGYM02CzofTc for <v6ops@ietfa.amsl.com>; Wed, 4 Dec 2019 17:09:20 -0800 (PST)
Received: from mta-p7.oit.umn.edu (mta-p7.oit.umn.edu [134.84.196.207]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 12067120934 for <v6ops@ietf.org>; Wed, 4 Dec 2019 17:09:20 -0800 (PST)
Received: from localhost (unknown [127.0.0.1]) by mta-p7.oit.umn.edu (Postfix) with ESMTP id 47SyKq4hJGz9vklK for <v6ops@ietf.org>; Thu, 5 Dec 2019 01:09:19 +0000 (UTC)
X-Virus-Scanned: amavisd-new at umn.edu
Received: from mta-p7.oit.umn.edu ([127.0.0.1]) by localhost (mta-p7.oit.umn.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bNM3PyoUX2S3 for <v6ops@ietf.org>; Wed, 4 Dec 2019 19:09:19 -0600 (CST)
Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mta-p7.oit.umn.edu (Postfix) with ESMTPS id 47SyKq3Hbcz9vLGv for <v6ops@ietf.org>; Wed, 4 Dec 2019 19:09:19 -0600 (CST)
Received: by mail-qt1-f199.google.com with SMTP id m30so287846qtb.2 for <v6ops@ietf.org>; Wed, 04 Dec 2019 17:09:19 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=umn.edu; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=iF68JzWa2rUNRpgNH+HNhN4DSSuyv1f9iPnpROpnD2s=; b=nhwDCPxlKjmk5cg3MXp2FGSlZyDEipdyxDOag/X/DMmZsaVixdASS8ksfs5jpmOy3A 8uoYR1aWIrrh6eL9cKXdqZrCdPffowTpwT/Y59lyFRu4/n0cZwvPkdbyY5LR2GMJzxVs NmY6yhzDXYfDyVw0P0+mZCABND48hLBnRjRnJdjtX25UJgCGY2YGae6ruHwGGo9IHVSS 7+f3A+SZkPEC78fjJA6sB87EVgKupiscdlIdmeAv7khn4Z1US9AQDgDLbAYpa79SzCLb OmYbm6OeMhB5aXF98NuNXBtBEYcRq3J8C3XaQfvjDB/GSjiDV5IoS/XBaEDu2O8AQsh7 PnOA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=iF68JzWa2rUNRpgNH+HNhN4DSSuyv1f9iPnpROpnD2s=; b=W9QZzZjsZgvWP7WFbKAfGRrEkYN0NXKXSS3uJ/3PAxhcHHd3rUKcGCGbz5sMAtQi7N 5tQ8WLsyI2Y1z2dz2xvZUkzctEVD3EvlZa05zxQScfheoYFNd+Pbk+LW6AvIVAyv6nGy DyZlNIFDbStF+Wmbnyqxevvm0chZQ/UOJHOOvZbeYIUblTGaD2NU79TMpEpNCh10VKDP 0gQ19hIZffJ4c40FcQbSCBboNnvKFO2SktGlsU+VcNvWF+UaFZmWRlz0Jr4uW0vNF22N 4Kbp2tl9yndn+bexRpREy7dt8UBJFKONts29PsgSJhLXV/Q72+VTUVNDbjZO9pIIej6K Gn9Q==
X-Gm-Message-State: APjAAAWtKUFm1QPnj9JPS3zkGlWwMYzBR04M/ZEQn/XGh1wxvCXOw/gp U0rVrbD5L3YSofWz+clnLL1q9ruYoO+Nrake7jGug1cuwBuf3DYwu6u26ACBcjq8qjFAKjPUz01 W3rZtTbNYRzGmI+mM4sLRVaacfA==
X-Received: by 2002:aed:20c3:: with SMTP id 61mr5619139qtb.392.1575508158154; Wed, 04 Dec 2019 17:09:18 -0800 (PST)
X-Google-Smtp-Source: APXvYqz8awk5bk+0ErOvc80UvhIhGfoGUNHWer2TqK3XjdKHVStiA+cQ21H1wOaAwv/OhHBygo4uCanjtWzmoTyhDw0=
X-Received: by 2002:aed:20c3:: with SMTP id 61mr5619044qtb.392.1575508157554; Wed, 04 Dec 2019 17:09:17 -0800 (PST)
MIME-Version: 1.0
References: <CAFU7BAR1JLUZps=CAqJfeQtUf-xQ88RYvgYrPCP+QP0Ter7YFg@mail.gmail.com> <E03BBE6C-3BED-4D49-8F79-0A1B313EFD9D@apple.com> <28594.1575483729@localhost> <CAFU7BAQp2-4EwntFj6Nx+be54-fi+gnQmRgT6yS22p=vYugpzA@mail.gmail.com> <CAN-Dau1L_hdRMiGApa7VKuZ0_f5q1NJ-5sHMeg-dtTWa=Tq6bQ@mail.gmail.com> <CAFU7BAS9iMBWkdQF_hwK7squvG9A5f38miS=sWLNns=ZxK4GCg@mail.gmail.com>
In-Reply-To: <CAFU7BAS9iMBWkdQF_hwK7squvG9A5f38miS=sWLNns=ZxK4GCg@mail.gmail.com>
From: David Farmer <farmer@umn.edu>
Date: Wed, 04 Dec 2019 19:09:01 -0600
Message-ID: <CAN-Dau3WswixgY=B9dPwL-hTtxsjm-X-sJ6iXMtpifUAHF12DQ@mail.gmail.com>
To: Jen Linkova <furry13@gmail.com>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, dhcwg@ietf.org, V6 Ops List <v6ops@ietf.org>, draft-link-dhc-v6only@ietf.org
Content-Type: multipart/alternative; boundary="0000000000001279d10598ea9476"
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/jpAQ7Z6yLGV40IQd43tYeC1BDms>
Subject: Re: [v6ops] [dhcwg] IPv6-Only Preferred DHCPv4 option
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: v6ops discussion list <v6ops.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/v6ops>, <mailto:v6ops-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/v6ops/>
List-Post: <mailto:v6ops@ietf.org>
List-Help: <mailto:v6ops-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/v6ops>, <mailto:v6ops-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 05 Dec 2019 01:09:21 -0000

On Wed, Dec 4, 2019 at 7:03 PM Jen Linkova <furry13@gmail.com> wrote:

> On Thu, Dec 5, 2019 at 11:58 AM David Farmer <farmer@umn.edu> wrote:
> > Also, is there any reason that 0.0.0.0 shouldn't be the address retunded
> by a server "if the IPv6-only Preferred option is present in the Parameter
> Request List received from the client and the corresponding DHCP pool is
> explicitly configured as belonging to an IPv6-mostly network segment" as
> discussed in Section 3.3?
>
> We discussed that but some concerns were raised - allegedly it might
> make some DHCP-snooping switches very unhappy.
>

If that is really the case then I think some discussion on selecting the
address returned is probably needed in the draft.

Thanks.

-- 
===============================================
David Farmer               Email:farmer@umn.edu
Networking & Telecommunication Services
Office of Information Technology
University of Minnesota
2218 University Ave SE        Phone: 612-626-0815
Minneapolis, MN 55414-3029   Cell: 612-812-9952
===============================================

v2.23.0 | Report a Bug | By Email