Renaming Default ethx to ethy

Create /etc/mactab (if not exist) and edit it

# touch /etc/mactab
# mcedit /etc/mactab

/etc/mactab For 3 cards

# You can rename your ethx with another name, example : nic01, etc.
eth0 00:23:B7:89:39:E2
eth1 00:08:A3:20:F8:29
eth2 00:50:BA:29:B7:32