blackbox@openface.ca said:
> > Did you succeed in increasing the receive ring?
> Modifying source parameters on critical machines scares me

OK, I agree that such a change must be well tested.

> I still can though, if you think it will help.

If the interface is simply overloaded by some bursts,
it is likely to help.

[interrupt sharing]

If it happend with any of your cards if it is exposed to
the load, it is less likely to be an interrupt sharing issue.

> The problem seems to be on transmit (ex1) only.  The ex2 card is receiving
> only, and the ex1 card is transmitting only.

That's strange. The card gets a receive overrun. Are you
sure there is nothing coming in?

best regards
Matthias