IETF Logo Mail Archive

Re: [dnssd] When does MDNS/DNS-SD use IPv6?

Erik Kline <ek@google.com> Thu, 19 January 2017 08:29 UTC

Return-Path: <ek@google.com>
X-Original-To: dnssd@ietfa.amsl.com
Delivered-To: dnssd@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D4414129459 for <dnssd@ietfa.amsl.com>; Thu, 19 Jan 2017 00:29:40 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -5.9
X-Spam-Level:
X-Spam-Status: No, score=-5.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RP_MATCHES_RCVD=-3.199, SPF_PASS=-0.001] autolearn=ham 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 KSN6cD32-5bI for <dnssd@ietfa.amsl.com>; Thu, 19 Jan 2017 00:29:39 -0800 (PST)
Received: from mail-wm0-x22a.google.com (mail-wm0-x22a.google.com [IPv6:2a00:1450:400c:c09::22a]) (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 E8E3B1293F9 for <dnssd@ietf.org>; Thu, 19 Jan 2017 00:29:38 -0800 (PST)
Received: by mail-wm0-x22a.google.com with SMTP id d140so3925014wmd.0 for <dnssd@ietf.org>; Thu, 19 Jan 2017 00:29:38 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=82fvJ9hEIqI+uOe5VFAYUMaWvNZuEkAU84RvdkNFlNg=; b=S3LaJPHl60aYk7O+r0QjuomzMCdVYkgTE0AV9TVujN990c89nSLr14eWBqiTV5kYo9 Oy6R0M6cumcrywgjoPtXUOqa9eIJo2FjhOlmjuQ9TDVw5BoVOBvZkK8AvAO9XU9G6yBM Wu0Tr+1APKIjNkdH41ys7uRqTec78f3keLAa0rf2dkpvn5HNeR2HzZVYcRdci3OeA8Fh u1LY/Hnv7227GAgd/QPQVRpc5Y56sNmOlFKObB1R0BohFAfxAsyQ2oRzE4BW86F/pXRz bxcE6yBgPdDfCWqCVhzcvK061u7wRl78may+SzKNlghwYioRzGrBUHcTTJihwJ2PG8iU bj/Q==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=82fvJ9hEIqI+uOe5VFAYUMaWvNZuEkAU84RvdkNFlNg=; b=bMf0+WE0o2kWEHwqMA46pFGvbdR00caeSy/YZENDnDz+Jqx/0KDPTcA7R1vMTSQsz6 LpQUkheLL5alil6OFQzc0Ix+mrWyMSXcRihEEKb9ybb3lGwy0KJ3whgcaDcA770Pg+wS uON8VF9BBHeNqXz1EzRt4eHKZdyKqxwlSJ7Dm14CIUGc63c9tJAIcI8QUhCbnkLWqSNN n0mfThv1z6w5mJznYJJji3xLA7UOVzLTYGeIEla6HwNx0+APfjYDWZci+CygCJ5AI5pt aAQRG27eN+BT1RmIPvdAaiMZkqsdDEXWpIoqc0JpT7izsptt8skeTnOp8INl9fJTJHtf +B4A==
X-Gm-Message-State: AIkVDXKayVzOQa0lZ+h8MRMYCxHwk/RorGhp6liEel7Ucs+HHESH0MgU40pZrAfjDVfPwAzNzkqE7auHjxN/mGXs
X-Received: by 10.223.165.129 with SMTP id g1mr6457319wrc.156.1484814577257; Thu, 19 Jan 2017 00:29:37 -0800 (PST)
MIME-Version: 1.0
Received: by 10.28.21.69 with HTTP; Thu, 19 Jan 2017 00:29:16 -0800 (PST)
In-Reply-To: <4bbb6dce-3f89-40a6-9028-15d723391da0@email.android.com>
References: <4bbb6dce-3f89-40a6-9028-15d723391da0@email.android.com>
From: Erik Kline <ek@google.com>
Date: Thu, 19 Jan 2017 17:29:16 +0900
Message-ID: <CAAedzxp6z3MBkhY6P6FhogRYyD0a+uGXu-pfb5N6K0kvYXVajA@mail.gmail.com>
To: Hagen Paul Pfeifer <hagen@jauu.net>
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha-256"; boundary="94eb2c1cd87c74581d05466e5564"
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnssd/MYTaSDAYPoPbFF5Hfs8-6D27XkY>
Cc: "cheshire@apple com" <cheshire@apple.com>, dnssd@ietf.org, Christian Huitema <huitema@huitema.net>
Subject: Re: [dnssd] When does MDNS/DNS-SD use IPv6?
X-BeenThere: dnssd@ietf.org
X-Mailman-Version: 2.1.17
Precedence: list
List-Id: "Discussion of extensions to DNS-based service discovery for routed networks." <dnssd.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnssd>, <mailto:dnssd-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dnssd/>
List-Post: <mailto:dnssd@ietf.org>
List-Help: <mailto:dnssd-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnssd>, <mailto:dnssd-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 19 Jan 2017 08:29:41 -0000

On 19 January 2017 at 17:16, Hagen Paul Pfeifer <hagen@jauu.net> wrote:
>
>
> Am 19.01.2017 02:13 schrieb Christian Huitema <huitema@huitema.net>:
>
>
>> The Apple open source mDNSResponder implementation sends both queries in
>> parallel.
>
> OK. But if we all nodes do that and if all nodes publish their records on
> both IPv4 and IPv6, there is going to be a fair amount of duplicate traffic.
> More on potential fixes later in this message.
>
>
> Fair amount of what? DNS, OK, but considering all traffic it is probably
> neglicable. As always: it is a compromise between implementation complexity,
> already deployed software, new extensions, new bugs and other factors. And
> hoping that in a not so far future IPv6 only networks exists.

On networks with even moderate numbers of hosts it can be quite a lot
of traffic.  This is frequently a concern for battery impact (to those
devices that are primarily battery powered).  (We see bug reports
about this stuff.)

v2.23.0 | Report a Bug | By Email