Inconsistent NIC Identification

I hate when I found my Linux server changed the name of its cards. For example yesterday I found eth0 was mapped to the first card, but today (after the computer is rebooted) I found eth0 was mapped to the second card. Inconsistent!!!

I found tutorial that really works here . This is my conclusion:

You should make the mapping fixed. Please download wireless-tools package and edit manually the /etc/iftab file. The file contains mapping from a card name to its mac address (you can know it by executing “ip link show” from iproute package). Mac address is unique in our world. So don’t worry.

This are some examples of configuration of /etc/iftab file:

eth0 mac 00:12:17:90:88:3f arp 1
eth1 mac 00:90:22:fd:48:34 arp 1