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Date:      Wed, 25 Apr 2001 17:53:00 +0200
From:      Jacques Fourie <jf@trispen.com>
To:        freebsd-hackers@freebsd.org
Subject:   if_dc and bridging
Message-ID:  <20010425175300.A15616@brolloks.trispen.com>

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When doing bridging (Luigi's standard bridging code) using two Davicom
DM9102A NIC's, I am seeing some strange results. 

If I do a 'ping -s 8000' between two PC's sitting on either side of the bridge, 
I see a whole bunch of TX underrun errors on both NIC's of the bridge. 
Eventually both are put into store and forward mode. 
After this, I can hardly get any traffic through the bridge at all 
(maximum throughput I have seen is around 1kB/s). After a reboot, everything
is OK again. 

Does anyone have any idea what is going on? (The bridge is running
4.2-RELEASE)



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