Date: Thu, 28 May 2009 22:41:31 +0200 From: Jedrzej Kalinowski <kalinoj1@iem.pw.edu.pl> To: freebsd-net@freebsd.org Cc: pluknet <pluknet@gmail.com> Subject: Re: Bridging and stp question Message-ID: <4A1EF6FB.7080306@iem.pw.edu.pl> In-Reply-To: <a31046fc0905281328hfc5c3e4gf9378ab22e62ad94@mail.gmail.com> References: <4A1EE0F5.1070909@iem.pw.edu.pl> <a31046fc0905281328hfc5c3e4gf9378ab22e62ad94@mail.gmail.com>
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pluknet pisze: > 2009/5/28 Jedrzej Kalinowski <kalinoj1@iem.pw.edu.pl>: >> 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
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