Hi, This is my second try. I did not do a good job responding to the responses. I have a new MSI K9MM-V motherboard (AMD 64 X2) with a 4000+ dual AMD cpu. There were no indicated problems with the installation. The onboard network interface eth0 works fine when I a browsing the Internet. When I try to copy files over the LAN (scp, ftp, samba), the interface stops working. When I used Ethereal, it hung on a retransmit request repeatedly. I don't find any issues in Google except the MTU size. The drivers supplied with the MB are pretty old - up to FC 3. I am using the drivers supplied with FC 8 How can I determine if It is * Configuration * Drivers * Defective motherboard? Here is my modprobe.conf ###alias eth0 via-rhine ###alias eth0 velocityget alias eth0 via-rhine alias scsi_hostadapter libata alias scsi_hostadapter1 pata_via alias scsi_hostadapter2 sata_via alias snd-card-0 snd-via82xx options snd-card-0 index=0 options snd-via82xx index=0 Thanks Mike Johnston