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.
