How to add additional IPv6 on CentOS

Description of configuring IPv6 on CentOS

Below we have described how you can configure IPv6 on Centos. Please make sure that you follow the steps in the support article.

Step 1 – Contact Support for an IPv6

If you do not have an IPv6 address assigned, the first step is to send an email to [email protected] in order the get the required information for configuring your server with IPv6.

Step 2 – Log in to your server

Open a terminal and log in to your server using SSH.
$ ssh root@ip_address_or_domain

Step 3 – Open your network interface

Open your network interface file with your favorite editor. We have used nano in our example. The command below will open an empty file to create the eth1 interface
$ sudo /etc/sysconfig/network-scripts/ifcfg-eth1

Step 4 – Add the IPv6 to your network configuration

Use the information from step 1. Add a new block to the end of the file for the IPv6 interface. It should look like the configuration below. Replace the red marked text with your own configuration. Save it once you have added the IPv6 block.
auto eth1
DEVICE="eth1"
ONBOOT="yes"
BOOTPROTO="static"
IPV6INIT="yes"
IPV6ADDR="2a00:7b80:451:1::10/48"
IPV6_DEFAULTGW="2a00:7b80:451::1"


The grey marked number is the VLAN id which is used. The VLAN of this IPv6 is VLAN 451.

Step 5 – Add the IPv6 to your network configuration

You have few options to enable the IPv6. The easiest way is to restart the networking service. You can use the commands below to restart the network service.

CentOS 6

$ sudo /etc/init.d/networking restart
CentOS 7

$ sudo systemctl restart networking

Step 6 – Restart the network service

The final step is to check whether the configured IPv6 is working. If your own working station is supporting IPv6 you can test it through your terminal. You can find the commands below per Operating System.

Windows:
$ ping -6 2a00:7b80:451:1::8
Linux:
$ ping6 2a00:7b80:451:1::8
MacOS:
$ ping6 2a00:7b80:451:1::8