[NTLUG:Discuss] Bringing up a network interface on SuSE 10.1

[Leroy Tennison]

SuSE has (to me) this irritating characteristic of creating 
ifcfg-eth-id-<MAC address> files rather than ifcfg-eth0.  The problem is 
when the NIC changes (actually the host hardware and thus the embedded 
NIC, I moved a hard drive between machines).  I found the MAC address of 
the "new" NIC in dmesg and created ifcfg-eth-id-<"new" MAC address> but 
couldn't figure out how to bring it up.  Tried:

ifup eth0
	but eth0 doesn't exist because the ifcfg... didn't exist at boot
ifup <"new" MAC address>
	couldn't find it even though 'man ifup' said this would work
ifup <PCI identifier>
	couldn't find it even though 'man ifup' said this would work

I finally resorted to reboot which brought it up (but as eth4, not sure 
why).

How do I bring up a NIC after boot that isn't detected at boot?  Please 
don't say yast, I want to understand how to do it - not have the 
knowledge hidden behind an interface.