« With CentOS 6 everthing is handled by udev now. Go into
/etc/udev/rules.dand delete the
70-persistent-net.rulesfile and reboot. If you open it berfore hand you will most likey see the original NIC MAC listed as
eth0and the new one as
Now you need to edit
/etc/sysconfig/network-scripts/ifcfg-eth0and manually update to the MAC of your new NIC card.
Deleting the file forces the detection process to run again at boot with no baggage left over from the cloning process, namely the old NIC MAC address(es). »