Some problems take care of themselves: after a reboot (not the first, though) the BIOS assigned another IRQ to the network card, and, all of a sudden, everything worked fine.
I hadn´t remembered that I assign IRQ 7 to my sb16 via isapnp, so the BIOS doesn´t know about it. Setting it to "used" actually solved the problem. That´s why I called myself "dumb&stupid", though I hadn´t intended to be a prophet about this :-/ &rw -- / Robert Waldner <[EMAIL PROTECTED]> | Phone: +43 1 89933 0 Fax x533 \ \ KPNQwest/AT tech staff | Diefenbachg. 35 A-1150 Wien /