In article <199710262253.AAA04526@install3.clinet.fi> Charlie Root <root@install3.clinet.fi> writes:
   >Number:         4354
   >Synopsis:       bad crc and alignment errors, de driver, SMC 9334

   After switching from 9332 single port 10/100M ethernet to
   9334BDT dual 10/100M ethernet card kernel shows large number of bad crc
   and alignment errors:

   Oct 27 00:37:33 proxy2 /netbsd: de0: receive: 00:00:c0:fd:1a:c0: bad crc
   Oct 27 00:37:34 proxy2 /netbsd: de0: receive: 00:00:c0:fd:1a:c0: bad crc

   This does not seem to be completely fatal, the system seems to work, though
   I have not yet does heavy load situations and it is connected at 10Mbps now.

It turns out to be fatal, packet drops grow as load grows, and thus packet
loss causes tcp to slow down.

   I did try to switch the card, so the card should be ok.  Single port works
   fine also, both 10M ZNYX combo board and SMC single port 10/100M.

SMC dual 10M combo also works fine.  Seems to be a problem specific to
Dual 10/100M (SMC?).

SMC dual 10/100M has 21140 AC chips on it, if anyone is interested.

-- 
Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND, hsu@clinet.fi
mobile +358-40-5519679 work +358-9-43542270 fax -4555276