Create Virtual - Alias - NICs - CentOS

cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:1

sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0:0
sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0:1 

service network restart
ifconfig 

[root@node1 network-scripts]# cat /etc/sysconfig/network-scripts/ifcfg-eth0*

ifcfg-eth0:0 :
DEVICE="eth0:0"
BOOTPROTO="static"
BROADCAST="192.168.1.255"
DNS1="192.168.1.149"
GATEWAY="192.168.1.1"
IPADDR="192.168.1.217"
NETMASK="255.255.255.0"
ONBOOT="yes"
TYPE="Ethernet" 

ifcfg-eth0:1 :
DEVICE="eth0:1"
BOOTPROTO="static"
BROADCAST="192.168.1.255"
DNS1="192.168.1.149"
GATEWAY="192.168.1.1"
IPADDR="192.168.1.218"
NETMASK="255.255.255.0"
ONBOOT="yes"
TYPE="Ethernet" 

sudo nano /etc/sysconfig/network-scripts/ifcfg-eth*