How to add an extra IP to CentOS 7?
- by Sophia H
- in VPS
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Sometimes you need to add more than one IP to a NIC (Network Interface Controller), this situation occurs when you need to support two or more separate networks with one server. In this article, we are going to add an extra IP to one NIC in CentOS 7.
At first, we need to know the NIC name, to do this log in as root user and insert this command
The output sample is like below
As you see in the output, the NIC name is eno16777984 and the IP is 126.96.36.199
To change the NIC IP or to add more IPs, we should open the “/etc/sysconfig/network-scripts/eno16777984” file with one editor as below command:
Note that eno16777984 is my server’s NIC name and it is different in your server
The output is like:
Now press ‘i’ to edit the file and enter the new IP address that you want to add as IPADDR1 like the below picture. If this new IP is in a different subnet, enter the gateway and subnet mask as GATEWAY1 and PREFIX1.
Note that Prefix means the number of ‘1’ in the subnet mask.
After editing the file, press ‘esc’ and then type the ‘:wq’ to save and exit the file.
Now restart the network by this command
That’s all you need to add extra IP to your server’s NIC on CentOS 7