> Looks like you have a full-duplex/half-duplex mismatch between the
> 3com and the switch.
> earlier cisco are know to have problems with NWAY autoneg, I guess that's it.
> 

Thanks for your answer.
I looked stuff up in cisco docs and this issue is known indeed.
They advise to disable the auto polarity.
However, normally this is a driver issue and so i dont think anything can
be done about it exept changing the kernel source regarding the support
for this card i guess. 
Bye,

Reinoud.