Hi again, Sorry, but I forgot to mention some things that might be important. I'm using Linux Slackware 8.1, with the 2.4.18 kernel. The two tested 3com NIC's were one 3com Fast Ethernet 100Mbit PCI, and the other an older 3com 10Mbit PCI (don't know the exact model). The Intel NIC was an Intel PRO/100+. I'm using them as loadable modules. /Rikard Boström