Enter network card eth0
vi /etc/sysconfig/network-scripts/ifcfg-eth0
Add this command at last line
NM_CONTROLLED=NO
create a range0
vi /etc/sysconfig/network-scripts/ifcfg-eth0-range0
Input the following setting
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR_START=Your Starting IP address
IPADDR_END=Your Last IP address
CLONENUM_START=0
GATEWAY=Your Gateway
NETMASK=Your Netmask
NO_ALIASROUTING=yes
