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Date:      Sat, 01 Jun 2002 10:41:05 -0700
From:      Lars Eggert <larse@ISI.EDU>
To:        steve@pipenetworks.com
Cc:        m_evmenkin@yahoo.com, freebsd-net@freebsd.org, maxk@qualcomm.com
Subject:   Re: bridge code, tap or vtun issue on freebsd
Message-ID:  <3CF90731.7060504@isi.edu>
References:  <Pine.LNX.4.33.0206020022321.23169-100000@internal.pipenetworks.com>
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[-- Attachment #1 --]
steve@pipenetworks.com wrote:
 > I have found a bug in using vtun on freebsd in the type ether mode
 > in order to try and bridge ethernet over IP. I am not too sure where
 > the problem lies. The interfaces that are being placed into the
 > bridge group are not going into promiscuos mode.

This may not be directly relevant, but vtun also has other problems for
non-IPv4 traffic, because it doesn't put the tun decive into "multi-AF" 
mode. I've submitted patches (see the vtun SourceForge site), but 
haven't heard back from the author so far.

I'm looking into replacing vtun with netgraph, which handles this (I 
hope, still evaluating), and should also have the additional benefit of 
being an in-kernel mechanism, thus saving two user/kernelmode switches 
per packet. Maybe netgraph might work for you, too.

Lars
-- 
Lars Eggert <larse@isi.edu>           USC Information Sciences Institute

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