# vi /etc/sysconfig/network-scripts/ifcfg-eth0

================================
DEVICE=eth0
#BOOTPROTO=dhcp
BOOTPROTO=static
IPADDR=192.168.xxx.xxx
NETMASK=255.255.255.0
GATEWAY=192.168.xxx.1
HWADDR=xx:xx:xx:xx:xx:xx
ONBOOT=yes
================================

# service network restart