Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet

Fernando Gont <fernando@gont.com.ar> Tue, 05 November 2013 02:17 UTC

Return-Path: <fernando@gont.com.ar>
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 D6C7321E82E2 for <v6ops@ietfa.amsl.com>; Mon, 4 Nov 2013 18:17:04 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.6
X-Spam-Level:
X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, NO_RELAYS=-0.001]
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 BKI81Oe4OinL for <v6ops@ietfa.amsl.com>; Mon, 4 Nov 2013 18:17:04 -0800 (PST)
Received: from web01.jbserver.net (web01.jbserver.net [IPv6:2a00:d10:2000:e::3]) by ietfa.amsl.com (Postfix) with ESMTP id D20B321E82AC for <v6ops@ietf.org>; Mon, 4 Nov 2013 18:17:00 -0800 (PST)
Received: from [2001:67c:370:160:517b:6f2e:1bc7:1d4a] by web01.jbserver.net with esmtpsa (TLSv1:DHE-RSA-CAMELLIA256-SHA:256) (Exim 4.80.1) (envelope-from <fernando@gont.com.ar>) id 1VdWCH-0005Ui-IO; Tue, 05 Nov 2013 03:16:49 +0100
Message-ID: <52784DD1.7020106@gont.com.ar>
Date: Mon, 04 Nov 2013 17:45:53 -0800
From: Fernando Gont <fernando@gont.com.ar>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0
MIME-Version: 1.0
To: Ole Troan <otroan@employees.org>, "Templin, Fred L" <Fred.L.Templin@boeing.com>
References: <5278275C.50206@gont.com.ar> <alpine.DEB.2.02.1311050028410.26054@uplift.swm.pp.se> <52783535.9030200@si6networks.com> <20131105001243.53E28985D0D@rock.dv.isc.org> <527839C6.3000805@viagenie.ca> <2134F8430051B64F815C691A62D98318148100@XCH-BLV-504.nw.nos.boeing.com> <F4AB804C-2C8E-40EF-ACE9-0A901E4F5122@employees.org>
In-Reply-To: <F4AB804C-2C8E-40EF-ACE9-0A901E4F5122@employees.org>
X-Enigmail-Version: 1.5.2
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: "v6ops@ietf.org" <v6ops@ietf.org>
Subject: Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet
X-BeenThere: v6ops@ietf.org
X-Mailman-Version: 2.1.12
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: <http://www.ietf.org/mail-archive/web/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, 05 Nov 2013 02:17:05 -0000

Hi, Ole,

On 11/04/2013 05:25 PM, Ole Troan wrote:
>> Hi, if the network is dropping fragments we are just going to
>> have to fix it. Tunnels are an example of a packetization layer
>> that requires fragmentation.
> 
> does the above results show the _network_ dropping fragments, or
> the end host or a system closely associated with the end host
> dropping extension headers?

So far, I have not measured that, but will do.

In any case, the interesting (and unfortunate) data if the chances of
success when you use extension headers or fragmentation are in the
scale of "unlikely". :-(

Thanks,
-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1