happymaster23 wrote:
No this is not solution. I have tried to run firstboot but without result. There should be some script, that is making these files (including writing MAC address and full device name). Other thing is modprobe.conf - there is name of driver connected to device name (eth0, eth1, e.g.), but there is not solution how to change all that things when you are swapping ethernet card...
Basically you need to put the ethernet MAC address of the new card in the HWADDR= line of the appropriate ifcfg-eth? file. Assuming you are talking about Centos 5.x, the devices are renamed to match these files based on the hwaddr entries even if they were detected in a different order. But some conditions that I don't understand may trigger all of these files to be renamed with a .bak extension at bootup and new default dhcp configs created instead. This is never fun when your only access to the machine is through the network.