Please edit the file: /etc/sysconfig/network-scripts/ifcfg-eth0:1 like this: ----------------------------------------------- DEVICE=eth0:1 BOOTPROTO=static BROADCAST=192.168.100.255 IPADDR=192.168.100.254 NETMASK=255.255.255.0 NETWORK=192.168.100.0 ONBOOT=yes ----------------------------------------------- then run "/etc/init.d/network restart" to restart the network.