Question: how to change network interface name in rhel 6?
Answer: You will have to rename and edit the network script for the interface you will to rename. ... 
Open renamed device's config file (ifcfg-eth1) and Change Device=oldname (eth0) to newname (eth1). ... 
Down the interface eth0 and start the new interface. ... 
Verify the new settings with ifconfig or ip command.