Configuring IPv6 address on Linux

My environment: RH FC8 x86_64

To enable IPv6 globally, modify the file

# vi /etc/sysconfig/network

And append the following:

NETWORKING_IPV6=yes

Then change the NIC config file

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

And append the following IPv6 parameters:

IPV6INIT=yes
IPV6ADDR=<IPv6-IP-Address>
IPV6_DEFAULTGW=<IPv6-IP-Gateway-Address>

If you want to acquire the IPv6 address via DHCPv6 server, first make sure you have the DHCPv6 client installed:

# rpm –q dhcpv6-client

then modifiy the NIC config file and append the following parameters:

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

IPV6INIT=yes
DHCPV6C=yes

Edit the main DHCPv6 client config file

# cp /usr/share/doc/dhcpv6-client-*/dhcp6c.conf /etc/
# vi /etc/dhcp6c.conf

interface eth0 {
    send rapid-commit;
    request domain-name-servers;
};

Restart the network service

# /etc/init.d/network restart

Then check your eth0 configuration to make sure you get the ipv6 address:

# ifconfig eth0