To assign a new range of addresses to your server you'll need to create a RANGE file. To do so please follow these steps:

# cd /etc/sysconfig/network-scripts
# ls ifcfg-eth0-range*

If your ouput is:

[root@localhost network-scripts]#  ls ifcfg-eth0-range*

ifcfg-eth0-range0  ifcfg-eth0-range1

If a range file has already been created, you will need to create a new one for the new range of IPs you are adding. For example if you have one named range1, name the next range2 and so on. In the event there isn't, run this command:

# vi ifcfg-etho-range2  {since range 1 already exists}

Place the following text in the file:

IPADDR_START=192.xx.xx.xx
IPADDR_END=192.xx.xx,.xx
CLONENUM_START=0

CLONENUM_START defines where the alias will start. If this is the second range file, you will need to set
CLONENUM_START to a value higher than the number of IP addresses assigned. To check what you currently have used, you can run:

i.e:

eth0      Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

eth0:0    Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

eth0:1    Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

eth0:2    Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

eth0:3    Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

eth0:4    Link encap:Ethernet  HWaddr 00:26:6C:F2:D6:F8

on new Range

CLONEMUM_START=5 would be correct.

# ifconfig | grep eth0  { RUN ifconfig to get what eth device is being used}

This will list devices such as eth1:0, eth1:1, eth1:2, and so on. If you are planning to maximize your ranges up to eth1:3, you'll set CLONENUM_START to 4 to assign the IPs correctly.

Written by:

Rishi Padooman
President and Founder of Host NIT Inc.
www.hostnit.com
www.cpanelhosting.com