IETF Logo Mail Archive

Re: [dc] Requirement for a method to manage mac address in DC

Thomas Narten <narten@us.ibm.com> Mon, 13 February 2012 15:05 UTC

Return-Path: <narten@us.ibm.com>
X-Original-To: dc@ietfa.amsl.com
Delivered-To: dc@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7245721F8622 for <dc@ietfa.amsl.com>; Mon, 13 Feb 2012 07:05:31 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -109.897
X-Spam-Level:
X-Spam-Status: No, score=-109.897 tagged_above=-999 required=5 tests=[AWL=0.702, BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8, 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 rJE0xI9O4KkR for <dc@ietfa.amsl.com>; Mon, 13 Feb 2012 07:05:30 -0800 (PST)
Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by ietfa.amsl.com (Postfix) with ESMTP id C59BB21F85ED for <dc@ietf.org>; Mon, 13 Feb 2012 07:05:30 -0800 (PST)
Received: from /spool/local by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for <dc@ietf.org> from <narten@us.ibm.com>; Mon, 13 Feb 2012 08:05:29 -0700
Received: from d01dlp03.pok.ibm.com (9.56.224.17) by e36.co.us.ibm.com (192.168.1.136) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Mon, 13 Feb 2012 08:03:54 -0700
Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by d01dlp03.pok.ibm.com (Postfix) with ESMTP id E699CC9006E for <dc@ietf.org>; Mon, 13 Feb 2012 10:03:50 -0500 (EST)
Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q1DF3lI9217116 for <dc@ietf.org>; Mon, 13 Feb 2012 10:03:47 -0500
Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q1DF3MjB032286 for <dc@ietf.org>; Mon, 13 Feb 2012 10:03:22 -0500
Received: from cichlid.raleigh.ibm.com (sig-9-76-153-110.mts.ibm.com [9.76.153.110]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q1DF3Lkd032211 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 13 Feb 2012 10:03:22 -0500
Received: from cichlid.raleigh.ibm.com (localhost [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.5/8.12.5) with ESMTP id q1DF2lwo031814; Mon, 13 Feb 2012 10:02:47 -0500
Message-Id: <201202131502.q1DF2lwo031814@cichlid.raleigh.ibm.com>
To: stbryant@cisco.com
In-reply-to: <4F38DD6E.6020807@cisco.com>
References: <60C093A41B5E45409A19D42CF7786DFD522A9445A1@EUSAACMS0703.eamcs.ericsson.se> <201202130053.q1D0rggI051582@mse01.zte.com.cn> <60C093A41B5E45409A19D42CF7786DFD522A94465D@EUSAACMS0703.eamcs.ericsson.se> <4F38DD6E.6020807@cisco.com>
Comments: In-reply-to Stewart Bryant <stbryant@cisco.com> message dated "Mon, 13 Feb 2012 09:52:46 +0000."
Date: Mon, 13 Feb 2012 10:02:46 -0500
From: Thomas Narten <narten@us.ibm.com>
X-Content-Scanned: Fidelis XPS MAILER
x-cbid: 12021315-3352-0000-0000-00000295B7A9
Cc: dc@ietf.org
Subject: Re: [dc] Requirement for a method to manage mac address in DC
X-BeenThere: dc@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: IETF Data Center Mailing List <dc.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dc>, <mailto:dc-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/dc>
List-Post: <mailto:dc@ietf.org>
List-Help: <mailto:dc-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dc>, <mailto:dc-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 13 Feb 2012 15:05:31 -0000

Stewart Bryant <stbryant@cisco.com> writes:

> > MAC conflict is perhaps true when vendors manufacture many NICs with 
> > the same MAC

> Maybe  drivers should refuse to enable in the presence of
> such a conflict?

That is what IPv6 effectively does, when stateless address autoconfig
is done. If there are duplicate addresses, the interface shuts
down.

You are pretty much guaranteed to get get duplicate IPv6 link-local
addresses if there are duplicate MAC addrs in use.

But in a data center, I would not expect so much use of stateless
autoconfig...  

Thomas

v2.23.0 | Report a Bug | By Email