On Oct 4, 2009, at 3:28 AM, Dazed_75 wrote: > ubuntu 9.04 from /var/log/messages > > ifserver kernel: [ 9.611230] udev: renamed network interface eth0 > to eth1 > > BTW, this is the ethernet port on the motherboard. I assume that it > was originally known as eth0. But when a PCI ethernet card was > added, I was surprised to see it listed as eth0 and the motherboard > as eth1. Apparently now that the machine is back to only having the > MB ethernet, udev is still wanting to call it eth1. Probably a > better idea than trying to find and fix all references to eth0 and > eth1. I'm not sure if you're using NetworkManager or configuring your own interfaces. In NetworkManager, I see how to look up which MAC address is associated with which ethernet device (eth0, eth1, etc), but I don't see any way to set these associations. If you're doing your configuration via /etc/network/interfaces, you can add a 'hwaddress' stanza in the configuration for either a 'static' or 'dhcp' interface. I think you should be able to use that to control which device becomes eth0, eth1, etc. alex