IETF Logo Mail Archive

Re: DAD question

Carsten Bormann <cabo@tzi.org> Sun, 12 August 2012 21:27 UTC

Return-Path: <cabo@tzi.org>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B179821F868A for <ipv6@ietfa.amsl.com>; Sun, 12 Aug 2012 14:27:48 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -106.335
X-Spam-Level:
X-Spam-Status: No, score=-106.335 tagged_above=-999 required=5 tests=[AWL=-0.086, BAYES_00=-2.599, HELO_EQ_DE=0.35, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100]
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 4B5XydoMWgcg for <ipv6@ietfa.amsl.com>; Sun, 12 Aug 2012 14:27:48 -0700 (PDT)
Received: from informatik.uni-bremen.de (mailhost.informatik.uni-bremen.de [IPv6:2001:638:708:30c9::12]) by ietfa.amsl.com (Postfix) with ESMTP id 045D921F84FB for <ipv6@ietf.org>; Sun, 12 Aug 2012 14:27:47 -0700 (PDT)
X-Virus-Scanned: amavisd-new at informatik.uni-bremen.de
Received: from smtp-fb3.informatik.uni-bremen.de (smtp-fb3.informatik.uni-bremen.de [134.102.224.120]) by informatik.uni-bremen.de (8.14.3/8.14.3) with ESMTP id q7CLRdUT013787; Sun, 12 Aug 2012 23:27:39 +0200 (CEST)
Received: from [192.168.217.105] (p5489298A.dip.t-dialin.net [84.137.41.138]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by smtp-fb3.informatik.uni-bremen.de (Postfix) with ESMTPSA id E7CA1B8D; Sun, 12 Aug 2012 23:27:38 +0200 (CEST)
Subject: Re: DAD question
Mime-Version: 1.0 (Mac OS X Mail 6.0 \(1485\))
Content-Type: text/plain; charset="iso-8859-1"
From: Carsten Bormann <cabo@tzi.org>
In-Reply-To: <20120812.222947.41669274.sthaug@nethelp.no>
Date: Sun, 12 Aug 2012 23:27:37 +0200
Content-Transfer-Encoding: quoted-printable
Message-Id: <4AEE4E56-3B21-4027-A401-893835BC12CA@tzi.org>
References: <5FAE0128-DDE7-45C4-8632-F56EAA1BE362@gmail.com> <20120811.180104.41668882.sthaug@nethelp.no> <F5BA0A3C-8B88-4877-A25E-A23C7E5C0D27@gmail.com> <20120812.222947.41669274.sthaug@nethelp.no>
To: bob.hinden@gmail.com
X-Mailer: Apple Mail (2.1485)
Cc: ipv6@ietf.org
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
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: <http://www.ietf.org/mail-archive/web/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: Sun, 12 Aug 2012 21:27:48 -0000

On Aug 12, 2012, at 22:29, sthaug@nethelp.no wrote:

> Explicit manufacturing mistakes (e.g. vendor turning our X copies of
> the same box with the same MAC address) have been reported on ops
> lists several times in the past.

Counterfeiting of network hardware may be another source of problems.
A counterfeiter has a strong incentive to use an inconspicuous MAC address, i.e. one that is indistinguishable from the real thing, and they may hit the real thing as a result.

Grüße, Carsten

v2.23.0 | Report a Bug | By Email