You can assign up to 255 ip addresses to every NIC (Network Interface Card). For achieve this goal you can use
ifconfig command like following:
ifconfig eth0:1 127.0.0.2
Change eth0 with your arbitrary NIC.
When you execute this command, you actually create a Virtual NIC, For make it permanent create a script with that name for example
/etc/sysconfig/network-scripts/ifcfg-eth0:1 and put your settings to there.