FWIW, we have seen similar problems (poor throughput, TX underrun, and
watchdog timeouts) with plain TCP (not bridging) on systems with built-in
Davicom DM9102 devices running FreeBSD 4.0 and 4.2. Reboot improves the
performance for a while. There seems to be a few problems with the Davicom
chip...
Guy Helmer, Ph.D.
http://www.palisadesys.com/~ghelmer/
Sr. Software Engineer, Palisade Systems
[EMAIL PROTECTED]
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Jacques Fourie
> Sent: Wednesday, April 25, 2001 10:53 AM
> To: [EMAIL PROTECTED]
> Subject: if_dc and bridging
>
>
> 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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