Unable to find network card in CentOS 6

Some time we are unable to find network information on ifcfg command or network connection does not work after cloning.

To see all interfaces   ifcfg -a

To force CentOS 6 to re-detect network interfaces

Delete the MAC Address from ifcfg-eth0 file

vi /etc/sysconfig/network-scripts/ifcfg-eth0

Remove the old 70-persistnet-net.rules file with the following command

rm -f /etc/udev/rules.d/70-persistent-net.rules

Reboot the machine.



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