After installing OpenSuse 12.3 (x64) on a server box with a single (onboard) NIC (assigned to eth0), all works fine so far (static IP, static route, no "Network Manager" - just the good old way).
Because this box will be a server, I added two additional NICs. Now the problems start to show. The device names changed in a way, that the functional eth0 (on board, external IP) is now re-assigned to eth2 (or eth1, probably depending on unknown preconditions).
How to solve this? Any idea how to set up a network configuration with device names based on established convention (eth0 = external IP, eth1 .. ethN fur subnets 1..N)?
Never ever there have been any problems in preceeding SuSE versions. Maybe it's caused by an arcane systemd which looks like it cannot be disabled anymore?