From owner-freebsd-net@FreeBSD.ORG  Mon Sep  3 20:46:44 2007
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: net@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 98E9F16A418
	for <net@freebsd.org>; Mon,  3 Sep 2007 20:46:44 +0000 (UTC)
	(envelope-from tom@tomjudge.com)
Received: from smtp814.mail.ird.yahoo.com (smtp814.mail.ird.yahoo.com
	[217.146.188.74])
	by mx1.freebsd.org (Postfix) with SMTP id F422813C45B
	for <net@freebsd.org>; Mon,  3 Sep 2007 20:46:43 +0000 (UTC)
	(envelope-from tom@tomjudge.com)
Received: (qmail 37074 invoked from network); 3 Sep 2007 20:20:02 -0000
Received: from unknown (HELO ?192.168.1.2?)
	(thomasjudge@btinternet.com@86.140.28.215 with plain)
	by smtp814.mail.ird.yahoo.com with SMTP; 3 Sep 2007 20:20:01 -0000
X-YMail-OSG: IAVtg4gVM1lVfbwUlOqW8W9SgRwnJeVqEG9s_2rnFxFuYn2I
Message-ID: <46DC7AD0.4080800@tomjudge.com>
Date: Mon, 03 Sep 2007 22:21:20 +0100
From: Tom Judge <tom@tomjudge.com>
User-Agent: Thunderbird 1.5.0.12 (X11/20070604)
MIME-Version: 1.0
To: Andrew Thompson <thompsa@FreeBSD.org>
References: <46DC081F.6010203@tomjudge.com>
	<20070903173435.GA9902@heff.fud.org.nz>
In-Reply-To: <20070903173435.GA9902@heff.fud.org.nz>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: net@freebsd.org
Subject: Re: If_bridge and MST
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 03 Sep 2007 20:46:44 -0000

Andrew Thompson wrote:
> On Mon, Sep 03, 2007 at 02:11:59PM +0100, Tom Judge wrote:
>> Hi,
>>
>> I was wondering if if_bridge had been taught how to speak multiple 
>> instance spanning tree?
> 
> Not yet. I havnt started it yet and I do not know of anyone else working
> on it.
> 
> 
> Andrew


While playing with if_bridge today and a pair of Dell PowerConnect 
5324's (with the recent upgrade to MSTP) I noticed that it did not seem 
to be possible to enable STP on if_vlan bridge members.  This would seem 
to be correct as transmitting STP frames tagged with VLAN_ID would seem 
to break the spec and fall into the realm of cisco PVST.  However should 
if_bridge be taught that the vlandev should be used for collection and 
transmission spanning tree in this scenario or should if_vlan be taught 
to copy untagged [R]STP frames onto the vlan interface?


Tom