IETF Logo Mail Archive

Re: Please review: 6MAN WG Adoption call: draft-baker-6man-hbh-header-handling-03

<nalini.elkins@insidethestack.com> Tue, 20 October 2015 13:34 UTC

Return-Path: <nalini.elkins@insidethestack.com>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C36021A89AC for <ipv6@ietfa.amsl.com>; Tue, 20 Oct 2015 06:34:51 -0700 (PDT)
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=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham
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 UbqsGjHIOYxt for <ipv6@ietfa.amsl.com>; Tue, 20 Oct 2015 06:34:47 -0700 (PDT)
Received: from nm6-vm2.bullet.mail.ne1.yahoo.com (nm6-vm2.bullet.mail.ne1.yahoo.com [98.138.90.154]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 11DD11A898D for <ipv6@ietf.org>; Tue, 20 Oct 2015 06:34:34 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1445348073; bh=6CjyHpi2lM/XlKF1uMPDfrYSr6Un3rI/8LJKmR7iqdg=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:From:Subject; b=K2Oi5o2ROkNEU7uUgjZEdgd/wTBccboFXGrdPPIndJC7/ioTIUp+tJKazkJkUevuv8FCSf3f9AyOur2I/7mkhdnZ2z3+4oQjk1xLWeNeLvA/4oVI2t5TUNMDZHCEb4CNO+6/e8Ivr4GFL9GHTj6vAnawNlu5LCeljjzxRwpv3fNhqV9Yau36P0zfzkgcCZ59ylYMalDDXr43aZSyUlK8ie7+RGmh4HMWBrMb/Wz+SW5d5+LOKI86EGNi7iCR1GWPdViDubgxkJoPXE3xxLFUMtthjna5sNXWdvZycdCeZssqRE3xUgKMhLXT10zO8t+3m+6EoaYk7AgEZB91vE5OmQ==
Received: from [98.138.101.132] by nm6.bullet.mail.ne1.yahoo.com with NNFMP; 20 Oct 2015 13:34:33 -0000
Received: from [98.138.88.238] by tm20.bullet.mail.ne1.yahoo.com with NNFMP; 20 Oct 2015 13:34:33 -0000
Received: from [127.0.0.1] by omp1038.mail.ne1.yahoo.com with NNFMP; 20 Oct 2015 13:34:33 -0000
X-Yahoo-Newman-Property: ymail-3
X-Yahoo-Newman-Id: 586550.49541.bm@omp1038.mail.ne1.yahoo.com
X-YMail-OSG: iqIGlzQVM1n3rDmA2sVKzvs.FcFRCU0mub7sR.r_mta7GcwDUs59NMW.d7XgCFU x50nG3LKiN_wuvvhcPgWz5eLoLOnErT1v1eSU1BB5sr0Rr_QZRigJGPCdGBQBSiC2fwKZBMEJtsJ e2Vw_8sUnwfE.Ky6wbTj3X4VZzCNrzr7C05LSzK9IEWwez.OXdj_K250Y4t7y5tUD_b7MzQJx08l Pviluockgr3IpsZCVqBvI.xYb1FXXVRXMhl12iMtdTyHHQlpczvD6op36rhCOj7zfKybj7dQYqx7 5UxgI8yUTrPy2GVsAeSry7tTuKRq48282HpGW91fJ4g2zvw4aB8pzM0063J0AqZMK.Ir7gZHQLlZ svHWWBjKSRJaNRKbYbHmLboUuEEqyFrZCHh7EmbGULCmbQfhaFXRZ_T8WDjC_Q2nl1BVVW06tKiM xFcuX.vWYFHMqPL4YJhshVJccJRVeGlO7Lh0m4ECjkAK1LvpEYkTRm14kfbDKl9lBSCqj0ITuWar nsvXsM4GR75yTN61QP846UqZEjONX0.MOkGy6XzA4PFQm5GMmi1qHDBo-
Received: by 98.138.105.199; Tue, 20 Oct 2015 13:34:33 +0000
Date: Tue, 20 Oct 2015 13:34:15 +0000
From: nalini.elkins@insidethestack.com
To: Mark Smith <markzzzsmith@gmail.com>, Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <876554748.317330.1445348055127.JavaMail.yahoo@mail.yahoo.com>
In-Reply-To: <CAO42Z2z=Ge-mSmK5fzmtRki1w9YaFpnaehuy6Wy1WUygV9+1CQ@mail.gmail.com>
References: <CAO42Z2z=Ge-mSmK5fzmtRki1w9YaFpnaehuy6Wy1WUygV9+1CQ@mail.gmail.com>
Subject: Re: Please review: 6MAN WG Adoption call: draft-baker-6man-hbh-header-handling-03
MIME-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/ipv6/r5cFxXF_i-hhgKcWDZ-nYQatPNI>
Cc: 6man Chairs <6man-chairs@tools.ietf.org>, 6man WG <ipv6@ietf.org>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: nalini.elkins@insidethestack.com
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 20 Oct 2015 13:34:51 -0000


>The unicast source address in a packet indicates the source of all information in a packet - the packet originator.

>If a device in the network adds information, such as extension headers, the unicast source address value has lost some if its meaning, because it now doesn't identify the source of all >of the contents of the packet.

>The packet is now a "multi-source" packet, rather than a single or "uni-source" packet, yet only the first of the packet content sources is available in the packet's unicast source >address field.

>Any mechanisms that depend on a source address identifying the single and original source of the packet, such as PMTUD, may now fail.

On networks today, you will see "third party reset".  That is, a middle box sending a reset to a destination address with what appears to be the unicast source address of the originator. But, it is not actually sent by that source address but by a box in the middle.  Just saying, the source address does not in all cases indicate the packet originator.  And, I am not talking about MITM.  This situation can happen today if there are too many retransmits, for example.

Not saying we want to perpetuate this kind of behavior.

v2.23.0 | Report a Bug | By Email