Centos 7 - How to add additional IP address

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For adding additional IP address to your server running CentOS, you need to do the following..

1. Connect via ssh to our server. Create file /etc/sysconfig/network-scripts/ifcfg-eth0:0 with the following content:

DEVICE=eth0:0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.0.11
NETMASK=255.255.255.255

(IPADDR and NETMASK data use those that you received when ordering an IP address)

2. It can be done using next commands. Go to the network-scripts directory: cd /etc/sysconfig/network-scripts/. Then create a new file:

# nano ifcfg-eth0:0

3. After that, restart the network service:

service network restart

We execute ifconfig, we see that eth0:0 has appeared.

eth0:0 Link encap:Ethernet HWaddr 00:11:22:33:44:55

inet addr:192.168.0.11 Bcast:192.168.0.11 Mask:255.255.255.255

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

Interrupt:185 Base address:0xa000

Adding an additional IP address is completed.