How to add multiple IPs on an Ethernet network interface card i.e. eth0? OR
How to add additional IPs on a Linux server?
People find it rather hard to add the IPs manually on a Plain server. Following are the steps you can follow to add a range of IPs on a CentOS server:
1 ) Change directory to /etc/sysconfig/network-scripts/ using the ‘cd’ command:
cd /etc/sysconfig/network-scripts/ (this directory contains Interface configuration files)
2) Create a file ifcfg-eth0-range0 using your favorite text editor like ‘pico’
3) Add the following lines to the file:
IPADDR_START is the first IP in the range.
IPADDR_END is the last IP in the range.
CLONENUM_START=1, where 1 will start adding IPs from eth0:1
4) Save and exit the file.
5) You now need to execute “ifup-aliases” script for the range of IPs to take affect. Execute the following command:
This will add the IPs on eth0 and will bring all the virtual interfaces up. You can view all the interfaces using the “ifconfig” command.