IETF Logo Mail Archive

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

Lorenzo Colitti <lorenzo@google.com> Tue, 10 December 2019 01:47 UTC

Return-Path: <lorenzo@google.com>
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 1F99912006B for <v6ops@ietfa.amsl.com>; Mon, 9 Dec 2019 17:47:58 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -17.499
X-Spam-Level:
X-Spam-Status: No, score=-17.499 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, ENV_AND_HDR_SPF_MATCH=-0.5, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5, USER_IN_DEF_SPF_WL=-7.5] autolearn=unavailable autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=google.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 tgoyB6CwLYIT for <v6ops@ietfa.amsl.com>; Mon, 9 Dec 2019 17:47:54 -0800 (PST)
Received: from mail-io1-xd2b.google.com (mail-io1-xd2b.google.com [IPv6:2607:f8b0:4864:20::d2b]) (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 A583212001A for <v6ops@ietf.org>; Mon, 9 Dec 2019 17:47:54 -0800 (PST)
Received: by mail-io1-xd2b.google.com with SMTP id s25so2352786iob.0 for <v6ops@ietf.org>; Mon, 09 Dec 2019 17:47:54 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=YtARK3iwEY4OoQFhXpw6xpyN04Lk1N7ayZOl00wAGBI=; b=RifKpaAD9C01VLg7GyMF2kRPsxKH6miL69npG7vWns74op0PF5Idyjdh78l5dAOYhl tcAZU3FSixbjMBQ1Ey6G0gFjeeCqL6/EristbC/0hYzQ9ktUWPYl0n4pEGRSWw21yEsa MWERv4Q7mDxEKcilPTDSKPgT65BvgmBKcyhPEi0jePjvS94UVj3Niauw8Ru3aeNtergG SRZ0ViJPRDytT/3SWGCg/V4TYIU+zi4yX3/jXcJtKAkBGVaEh6/tyT/H91I2glYawhFq 6kUEE8lVA+Y+yNlJH33ZUGi5cWHrTqJS8g5x1Sm/O7O6WXNwwq/KdjZjs6yPAzDkhoRk aLkA==
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=YtARK3iwEY4OoQFhXpw6xpyN04Lk1N7ayZOl00wAGBI=; b=hBrTvyU1kBKGvO4OqsmoE1vPX5GZAU+BYqNwm4b/kTdgsFSR/Z0x/gUzGzoEkJt+GO VCwhgTA+e2PDaHk8GMEYl9sRyYLJVMVikdwKRohFCZZYRiYzU8wV42VPASX3I7Nf0tfK CFc/p5MmCvnWdSZWCjf5quOO+XM4Zv6qOltKmmSL0xXZrBvMNAvRjv7b/9SHPzy4ou8d Wa/OFgQ4mypCqgwro6j31mjyrY8zlvDeKdKuQ0oCe3vQvQzkmxE4UiIRQ9MgAdDCy93n RJ6vcPS7qYAyWjkk8SeHjUo3rqFtO26oV++dJVeuoFNncowPC4Q0M+NC5JidBJwt45kB KYCg==
X-Gm-Message-State: APjAAAUXyVzE3vaYkiQYMO5lkaXCqZU6ZnvgV91SFJhGOWbhMa2SHsuA j0V0ElAqKkNTL8Z6NnE5hEfGaN3QLLP48mAs4wgRhg==
X-Google-Smtp-Source: APXvYqy7x4LoHOjpv2zCze/fgIRZNMUiUzS85SbOK8cfe753wuFZMkIJ8N/XqVMXmy11pehwzMbOKzjLnXse2r7Ub1c=
X-Received: by 2002:a05:6638:76c:: with SMTP id y12mr5574462jad.95.1575942473729; Mon, 09 Dec 2019 17:47:53 -0800 (PST)
MIME-Version: 1.0
References: <CAFU7BAR1JLUZps=CAqJfeQtUf-xQ88RYvgYrPCP+QP0Ter7YFg@mail.gmail.com> <da078a21-b606-f0d9-3833-d66b20410853@marples.name> <CAFU7BASdWZv1RTVa5v4thbKPqCrmG886G+hK2J0UoZ3TbELDnw@mail.gmail.com> <b52fdd35-9663-e7df-7303-748a6b3a57ce@marples.name> <CAKD1Yr0vp2gaVRza+wei0qM6T9oN=iu39jRjK-cvhheorgE=Xg@mail.gmail.com> <67155c63-2442-2846-57f2-82fa4da16251@marples.name> <CAKD1Yr3y9eycfenN-t9oU_zgPHEZPy-AVXs3qXkWOBe9UXxVUQ@mail.gmail.com> <a6035aba-cab5-c779-c977-8b1a995eccfd@marples.name> <c4512681-a064-adff-67f2-e26d58186db0@gmail.com>
In-Reply-To: <c4512681-a064-adff-67f2-e26d58186db0@gmail.com>
From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 10 Dec 2019 10:47:41 +0900
Message-ID: <CAKD1Yr3U7xX4qFy_zMSm33pVTkCn0gqg75Su6MqdEJQEP06toQ@mail.gmail.com>
To: Tomek Mrugalski <tomasz.mrugalski@gmail.com>
Cc: Roy Marples <roy@marples.name>, Jen Linkova <furry13@gmail.com>, dhcwg@ietf.org, draft-link-dhc-v6only@ietf.org, V6 Ops List <v6ops@ietf.org>
Content-Type: multipart/alternative; boundary="00000000000055a08a05994fb3e3"
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/ZiG_IOpocFZlJgFw9eJN7Jh2KG8>
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: Tue, 10 Dec 2019 01:47:58 -0000

On Tue, Dec 10, 2019 at 10:25 AM Tomek Mrugalski <tomasz.mrugalski@gmail.com>
wrote:

> That's a good analogy. Would it be helpful if the V6ONLY_WAIT description
> was update to say something similar to: "Upon reception of the V6ONLY_WAIT
> option, the client sets its reverts back to DHCPDISCOVER retransmission and
> sets its retransmission timer to V6ONLY_WAIT seconds"?


If it sets its retransmission timer to V6ONLY_WAIT seconds, then if the
first discover is dropped, will the second one be V6ONLY_WAIT seconds after
that? That seems bad. Once the V6ONLY_WAIT timer fires, we want the
retransmission interval to be back to a low value, like 1-2 seconds, right?

Perhaps it's poorly named, but it's very much DHCPv4 option. The option is
> not supposed to affect any IPv6 behavior.
>
> How about calling it what it really is: DISABLEV4?
>

It's not just "disable IPv4". It's "disable IPv4, because you there's this
other thing instead". See
https://mailarchive.ietf.org/arch/msg/dhcwg/Xc0yQIXWkKMCLlxhM-Bp0EW0P7w and
follow-ups.

v2.23.0 | Report a Bug | By Email