i am trying to install two nic on RH7.0. i config linuxconf and reboot, it fail eth0 and eth1.
one card is ne2k pci compatible and the other is a 3com isa 3c509
i try the config in linuxconf and it fail... i repeat the proc with netconf and it fail again...
Does someone can give me a step by step for a dummy:smash:

If the NICs fail to initialize at boot, the first thing to do is turn off Plug-N-Play support in your BIOS. It causes conflicts with some cards, and is a common reason for NIC installation troubles.

If that doesn't work, use the Forum Search; using keywords like "NIC", "ifconfig", "modprobe", and "alias eth0" to browse previous threads dealing with your problem. Configuring NICs is a very popular topic here; so I'm sure you'll find an answer in one of the archived discussions. Most of the solutions deal with just one installed NIC, so if someone suggests a procedure for troubleshooting eth0, remember to also do that procedure for your second NIC (eth1) as well.