[tulip] overruns ?

Donald Becker becker@scyld.com
Wed Jan 16 19:23:00 2002

On Wed, 16 Jan 2002, James Stevenson wrote:

> i have 2 cards from SMC each in 2 different computers and a 100mbps switch
> both work fine well almost in Full Duplex 100mbps.

What is the detection message?

What does 'mii-diag' or 'tulip-diag -m' report?

> eth0      Link encap:Ethernet  HWaddr 00:04:E2:1E:FE:B3
>           RX packets:1339805 errors:356 dropped:0 overruns:356 frame:356
>           TX packets:1403114 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:100

This could be a duplex mismatch.  If the link partner is not in full
duplex mode, it will abort transmit on out-of-window collisions.  You
will interpret that as receiving packets with CRC errors.

There are other possibilities.  What does /proc/net/dev report?

Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
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