The system was bought specifically to support Linux Fedora Core 3 (plus updates) and I stated that this was the target operating system. Last week Linux FC3 was loaded, the NIC devices were recognized in the boot, the proper drivers were loaded and when it came time to use the system "ifconfig -a" did not show either eth0 or eth1. After using the network configuration utility to try to set the MAC addresses, it would not set them as my supplied MAC address were "FF:FF:FF:FF:FF:FF" and as the NIC MAC was "FF:FF:FF:FF:FF:FF" the O/S would not load the eth0 or eth1 device for what is an invalid MAC address. This is a circular problem. The O/S will not accept a NIC address as it does not match the NIC address of "FF:FF:FF:FF:FF:FF" and the O/S will not load a eth0 device because the NIC address is and invalid "FF:FF:FF:FF:FF:FF" when it reads it.