On bash, go to /etc/sysconfig/network-scripts and you will see a list of interfaces
[root@server /etc/sysconfig/network-scripts]# ls *
ifcfg-lo
ifcfg-venet0
ifcfg-venet0:0
Add a new file after the last one, in the example the new file will be ifcfg-venet0:2
[root@server /etc/sysconfig/network-scripts]# nano ifcfg-venet0:2
and inside paste the details for the IP ranges. Let's say that you have been assigned the range 67.17.18.224/29 (8 in total, 5 usable IPs)
DEVICE=venet0:2
ONBOOT=yes
IPADDR=67.17.18.226 #<--Here the IP address
BROADCAST=67.17.18.231 #<--Here the last one for the range
NETWORK=67.17.18.224 #<--Here the first one for the range
Save the file and do the same for every other ip
[root@server /etc/sysconfig/network-scripts]# nano ifcfg-venet0:3
DEVICE=venet0:3
ONBOOT=yes
IPADDR=67.17.18.227 #<--Here the IP address
BROADCAST=67.17.18.231 #<--Here the last one for the range
NETWORK=67.17.18.224 #<--Here the first one for the range
and so on
At the end don't forget to do
service network restart
so that the new settings are loaded