How to Create Virtual Interface on CentOS 6 Linux
Creating Virtual Interface and Assign Multiple IP Addresses
Let’s assume you want create new virtual interface ifcfg-eth0:0 device and assign new IP 10.10.10.20
Network device files are located in /etc/sysconfig/network-scripts/ directory.
# cd /etc/sysconfig/network-scripts/ # cp ifcfg-eth0 ifcfg-eth0:0
Then edit new ifcfg-eth0:0 file with your favorite text editor (vi for me). We need to change only two parameters DEVICE, and IPADDR
# vi ifcfg-eth0:0 DEVICE="eth0:0" BOOTPROTO="static" GATEWAY="10.10.10.1" HWADDR="00:10:46:14:33:4D" IPADDR="10.10.10.20" NETMASK="255.255.0.0" NM_CONTROLLED="yes" ONBOOT="yes" TYPE="Ethernet"
Then you need save and restart the network service
# /etc/init.d/network restart
Now your new interface with 10.10.10.20 IP ready for use.
