The concept of creating or configuring multiple IP addresses on a single network interface is called IP aliasing. IP aliasing is very useful for setting up
Source: Create Multiple IP Addresses to One Single Network Interface
Assign Multiple IP Addresses to One Single Network Interface
- The device network (NIC) files located in “/etc/sysconfig/network-scripts/” directory.
- Navigate to the directory and do “ls -l” to list all devices.
cd /etc/sysconfig/network-scripts/
ls –l
[root@******** network-scripts]# ls -l
total 236
-rw-r–r–. 1 root root 394 Nov 5 13:13 ifcfg-ens192
- Copy existing parameters of interface “ifcfg- ens192” in virtual interfaces called ifcfg- ens192:0, ifcfg- ens192:1 and ifcfg- ens192:2.
cp ifcfg- ifcfg-ens192 ifcfg- ifcfg-ens192:0
cp ifcfg- ens192 ifcfg- ens192:1
cp ifcfg- ens192 ifcfg- ens192:2
- edit each file and rename the DEVICE name to its corresponding alias and change the IPADDR address.
For example:
DEVICE=” ens192 ” replace with ens192:0
BOOTPROTO=static
ONBOOT=yes
TYPE=”Ethernet”
IPADDR=172.16.16.125 replace with the new virtual IP.
NETMASK=255.255.255.224
GATEWAY=172.16.16.100
HWADDR=00:0C:29:28:FD:4C
- Once, you’ve made all changes, save all your changes and restart/start the network service for the changes to reflect.
[root@*************]# /etc/init.d/network restart
How to Assign Multiple IP Address Range
- if you would like to create a range of Multiple IP Addresses to a particular interface called “ifcfg-eth0“.
cd /etc/sysconfig/network-scripts/
cp -p ifcfg-eth0 ifcfg-eth0-range0
- Now open “ifcfg-eth0-range0” file and add “IPADDR_START” and “IPADDR_END” IP address range as shown below.
[root@***********]# vi ifcfg-eth0-range0
#DEVICE=”eth0″
#BOOTPROTO=none
#NM_CONTROLLED=”yes”
#ONBOOT=yes
TYPE=”Ethernet”
IPADDR_START=172.16.16.126
IPADDR_END=172.16.16.130
IPV6INIT=no
#GATEWAY=172.16.16.100
- Save it and restart/start network service
[root@**************]# /etc/init.d/network restart
guynaftaly 