• Ipv6 Address IP: 2607:f0d0:2001:000a:0000:0000:0000:0010/64
• Ipv6 Gateway IP: 2607:f0d0:2001:000a:0000:0000:0000:0001
• Interface name: eth0
• IPv6 Type: Static

WARNING! These examples are not about an IPv6 tunnel broker. This tutorial requires static IPv6 address which can be obtained from your network admin or ISP. For desktop usage and testing purpose see how to setup a tunnel broker (a network tunnel over IPv4) which can encapsulated connectivity over existing IPv4 infrastructure.

Adding IPv6 To Ubuntu Systems

Open /etc/network/interfaces file, enter (first login as root):
$ sudo -s
Make a backup and edit the file:
# cp /etc/network/interfaces /etc/network/interfaces.backup
# vi /etc/network/interfaces
Append configuration as follows:

### Start IPV6 static configuration
iface eth0 inet6 static
address 2607:f0d0:2001:000a:0000:0000:0000:0010
netmask 64
gateway 2607:f0d0:2001:000a:0000:0000:0000:0001
### END IPV6 configuration

Save and close the file. You can reboot the server or restart networking (Ubuntu server without systemd) service:
# /etc/init.d/networking restart
If you are using systemd (Ubuntu Linux 16.04 LTS server and above), enter:
# systemctl restart networking

Test IPv6 Configuration

To see your IPv6 address, enter:
# ifconfig eth0
# ip -6 address show eth0
Display kernel IPv6 routing table:
# netstat -nr -6
Ping to ipv6 enabled site such as cyberciti.biz (or ipv6.google.com):
# ping6 cyberciti.biz
Sample Output

PING cyberciti.biz(www.cyberciti.biz) 56 data bytes
64 bytes from www.cyberciti.biz: icmp_seq=1 ttl=60 time=65.3 ms
64 bytes from www.cyberciti.biz: icmp_seq=2 ttl=60 time=64.2 ms
64 bytes from www.cyberciti.biz: icmp_seq=3 ttl=60 time=63.9 ms
64 bytes from www.cyberciti.biz: icmp_seq=4 ttl=60 time=63.9 ms
64 bytes from www.cyberciti.biz: icmp_seq=5 ttl=60 time=64.1 ms
64 bytes from www.cyberciti.biz: icmp_seq=6 ttl=60 time=64.0 ms
64 bytes from www.cyberciti.biz: icmp_seq=7 ttl=60 time=64.0 ms

You can also run a traceroute:
# traceroute6 cyberciti.biz
Sample Output:

traceroute to cyberciti.biz (2607:f0d0:1002:11::4), 30 hops max, 40 byte packets
 1  ivp6gw.rose.simplyguide.org (2607:f0d0:2001:a::1)  0.739 ms  0.847 ms  0.962 ms
 2  2607.f0d0.2000.0001.0000.0000.0000.0005-static.v6reverse.softlayer.com (2607:f0d0:2000:1::5)  1.079 ms  1.197 ms  1.313 ms
 3  2607.f0d0.1000.0001.0000.0000.0000.0105-static.v6reverse.softlayer.com (2607:f0d0:1000:1::105)  64.457 ms  64.575 ms  64.691 ms
 4  2607.f0d0.1000.0001.0000.0000.0000.0056-static.v6reverse.softlayer.com (2607:f0d0:1000:1::56)  64.810 ms  64.925 ms  65.045 ms
 5  www.cyberciti.biz (2607:f0d0:1002:11::4)  67.486 ms  67.604 ms  67.719 ms

A note about IPv6 based DNS server

Edit /etc/network/interface file using a text editor and add the following line:

dns-nameservers 2001:4860:4860::8888 2001:4860:4860::8844

The Google Public DNS IPv6 addresses are used in above config file. Here is my complete listing:

Further Readings:

1. See sample IPv6 Firewall Script for Linux iptables.