I had an NT server 4.0 with two 3COM NIC cards installed. The first one (3c509b) installed fine. However, after I added and binded the second one (3c509), it didn't start. The event log reported event ID 5001(Could not allocate the resources necessary for operation). 3COM support site suggested that I tried different PCI slot. It didn't help.
Another 3COM tip suggested that I swapped the slot number in the registry \\local machine\system\current control set\services\elx1\parameter (slot 11) with the good card (elx2) which is slot 13). When I did that, elx1 works and elx2 stopped working. I tried different combination of slots but couldn't get the second card to work.
Wonder if anyone has run into with problem with 3COM NIC cards when setting up their multihome NT server?