IETF Logo Mail Archive

Re: [v6ops] IPv6-Only Preferred DHCPv4 option

Jen Linkova <furry13@gmail.com> Thu, 05 December 2019 02:27 UTC

Return-Path: <furry13@gmail.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 BB04212091E for <v6ops@ietfa.amsl.com>; Wed, 4 Dec 2019 18:27:34 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.749
X-Spam-Level:
X-Spam-Status: No, score=-1.749 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no 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 tRDFgko1AexO for <v6ops@ietfa.amsl.com>; Wed, 4 Dec 2019 18:27:34 -0800 (PST)
Received: from mail-qk1-x734.google.com (mail-qk1-x734.google.com [IPv6:2607:f8b0:4864:20::734]) (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 0ABE8120828 for <v6ops@ietf.org>; Wed, 4 Dec 2019 18:27:34 -0800 (PST)
Received: by mail-qk1-x734.google.com with SMTP id d124so2018737qke.6 for <v6ops@ietf.org>; Wed, 04 Dec 2019 18:27:33 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=xkmWb9kwsFnEKUSavCJjZJHEN+Y4Wq4p702oe7qfDOU=; b=KKFVaUjeAmHWETZS8E/5vp++2Qkey67tUj0c11vdGnZJVhsroBti0gLJ4wA+35jjQw GVsFfMH/muarVEAjB/wquluPDz8lQKrosrqFyZ7nRdNDXoc+wUKh2x6RrFC4P9tH/lfF euP9Tfs3lAmwnbn3h3MvA2/yimpMsMaW9uH9hOqMzFet/1RCFLxBkH0v4Ap+qg4mDqoR uBimaYrRDaUoXZWhbYeS0VAEeOnszYYkMQ572nkMFn4xu+sQjil7908v69LVD/SaMtke 7czbGAP0VwkfuZjS/qoYgLlrS3Ewfi2+js+Q1U+rGVJsYoYw2gtBiML0eJh7vAjcKNX4 9/8Q==
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=xkmWb9kwsFnEKUSavCJjZJHEN+Y4Wq4p702oe7qfDOU=; b=ZjA5V7S7YO4x4oqFmw9ZOR/0FM03ZKdn/2e7ajtwOzk6dLU9ZdDtQvo4GJav7VjeJS PWrNauxZd4MVI4w3YrURA97dfGdzC6MFPh65PT//lMtz9tTnBKM/rqZngOaFgSvEejpt YN3ch+zoYohonz8/IvrAWIJs+qAs7zcx9rVhCpTTZBMV/n0IIKdmV4thzzBGepdHZNh5 ihdqORrTadvMRqemWQeN3jKeRd5cnh3L+YYUcIg9jSvTin0LfXAkUp1ESLdYK1ScemFT 5M/eVF8EPaD6MUfNDO1g0TQ0HUSQKG1uZOJ8UxNGDplq6RqhypigL9aU30+tT1KSPquG rr7g==
X-Gm-Message-State: APjAAAUXAGtdIWpgH5bPpKiN19s5BaW/vp0W4Kf3h2XePnOlXSM/lXEW hV2Zt+7f29yWxeXhawzj62l4U+uinI5p0Mw+aLg=
X-Google-Smtp-Source: APXvYqzp0FLwDzA52Ibxasd1v1Jcb+3WHk7A3YE13YAlcoevINGkqshY5/VL4YCGW/thIw8eb49agJlcVszDAhzA1b4=
X-Received: by 2002:a37:4841:: with SMTP id v62mr5896621qka.444.1575512852716; Wed, 04 Dec 2019 18:27:32 -0800 (PST)
MIME-Version: 1.0
References: <CAFU7BAR1JLUZps=CAqJfeQtUf-xQ88RYvgYrPCP+QP0Ter7YFg@mail.gmail.com> <E03BBE6C-3BED-4D49-8F79-0A1B313EFD9D@apple.com> <28594.1575483729@localhost> <7ac18a46-31d9-74cc-117a-0fd908413aac@gmail.com> <9bd73ee1-46f7-5084-06a6-59c7b391f9cb@foobar.org> <CAKD1Yr0KPfFvk7Y49WkiVnm1q0E6i1u1hi4p_x56=p+kP9g=0g@mail.gmail.com> <CAO42Z2w1hK75xBEKfFH52ki9U5ZTC=RNSs4d+9K0PFAtMYa42A@mail.gmail.com>
In-Reply-To: <CAO42Z2w1hK75xBEKfFH52ki9U5ZTC=RNSs4d+9K0PFAtMYa42A@mail.gmail.com>
From: Jen Linkova <furry13@gmail.com>
Date: Thu, 05 Dec 2019 13:27:21 +1100
Message-ID: <CAFU7BAT+d1==Jbvjx9smPHBQ0SD9zxCaz7G4PCX1ySE9eusjuw@mail.gmail.com>
To: Mark Smith <markzzzsmith@gmail.com>
Cc: Lorenzo Colitti <lorenzo=40google.com@dmarc.ietf.org>, v6ops list <v6ops@ietf.org>
Content-Type: text/plain; charset="UTF-8"
Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/ftNH39sQ7UQzoA2gIQLHpzEYPvw>
Subject: Re: [v6ops] 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 02:27:35 -0000

On Thu, Dec 5, 2019 at 11:53 AM Mark Smith <markzzzsmith@gmail.com> wrote:
> Why aren't IPv4 (and IPv6) addresses acquired on-demand when the first application opens an IPv4 (or IPv6) socket, and then released when the last application closes the last IPv4 socket?

- Because then all devices in my network would request IPv4 all the
time.  Even if an application supports IPv6, it might still try to
open IPv4 socket. In case it's on a dual-stack or IPv4-only network.
Therefore I'd not achieve my goal of reducing IPv4 footprint in the
network.
- If the host is running clat, then applications might open IPv4
sockets but it does not necessary mean the host itself needs an IPv4
address. It might not if the network provides NAT64. Or it might if
the network is just dual-stack or IPv4-only.

-- 
SY, Jen Linkova aka Furry

v2.23.0 | Report a Bug | By Email