[...]
> Apr 23 09:47:12 seinfeld kernel: eth0: reset did not complete at
> ei_rx_overrun.
> Apr 23 09:47:23 seinfeld kernel: eth0: reset did not complete at
> ei_rx_overrun.
> ------------------------------------------------------------------------
>
> Any clues as to what's going on here?
Yes, the card is getting spammed with more packets than it can handle,
and is suffering continuous overruns. (Probably an 8k wd8003) Note that you
only hear about an overrun like the above when the subsequent reset fails.
Otherwise it is dealt with silently. Thus you are probably getting
multiple overruns per second. Reduce your TCP window as discussed in
the performance tips section of the Ethernet-HowTo, and in "man route".
Paul.