From owner-freebsd-net@FreeBSD.ORG Thu May 28 20:38:42 2009 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ABFCD1065721 for ; Thu, 28 May 2009 20:38:42 +0000 (UTC) (envelope-from kalinoj1@iem.pw.edu.pl) Received: from volt.iem.pw.edu.pl (volt.iem.pw.edu.pl [194.29.146.3]) by mx1.freebsd.org (Postfix) with ESMTP id 69C5A8FC0C for ; Thu, 28 May 2009 20:38:42 +0000 (UTC) (envelope-from kalinoj1@iem.pw.edu.pl) Received: from [192.168.1.183] (chello089079156006.chello.pl [89.79.156.6]) (Authenticated sender: kalinoj1) by volt.iem.pw.edu.pl (Postfix) with ESMTPSA id 4BD19A66736; Thu, 28 May 2009 22:38:41 +0200 (CEST) Message-ID: <4A1EF6FB.7080306@iem.pw.edu.pl> Date: Thu, 28 May 2009 22:41:31 +0200 From: Jedrzej Kalinowski User-Agent: Thunderbird 2.0.0.21 (X11/20090524) MIME-Version: 1.0 To: freebsd-net@freebsd.org References: <4A1EE0F5.1070909@iem.pw.edu.pl> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Virus-Scanned: clamav-milter devel-r5066-exp at volt.iem.pw.edu.pl X-Virus-Status: Clean Cc: pluknet Subject: Re: Bridging and stp question X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 May 2009 20:38:43 -0000 pluknet pisze: > 2009/5/28 Jedrzej Kalinowski : >> Hello, >> >> I'm using a bridge to connect tap devices used by qemu emulator to an >> outside world. >> >> I run into a bit of problem however, because if I feed qemu virtual >> machine with two tap interfaces - I need to turn on stp on them when >> adding to a bridge to prevent a loop . >> >> This is probably due to improper qemu behaviour as I suppose, because I >> does not happen when I run two qemu machines with each of them getting >> one tap device. >> >> As we know from 'man ifconfig' the default behaviour for the interface >> added to a bridge is to add it with stp protocol disabled and I have to >> specify stp explicitly. >> >> My question is: >> >> Is there any way to configure the bridge to add stp protocol to any >> added (via ifconfig bridgeX addm ifX) member interface - so to change >> the default behaviour? Or specifying it explicitly is unavoidable? >> > > Let me clarify some. Did I understand you correctly > that `ifconfig bridge0 addm ifX stp ifX` doesn't fit you needs? > Well, it works fine. It just would be more comfortable for me to do just: ifconfig bridge0 addm ifX and have bridge0 configured to add stp proto to each member interface as a default action. It would allow me to configure spanning tree on specific bridge globally, with no need to do it for each member interface. -- Jędrzej Kalinowski