IPv6: How to configure IPv6
Cisco routers do not have IPv6 routing enabled by default. To configure IPv6 on a Cisco routers you need to do two things:
1. enable IPv6 routing on a Cisco router using the ipv6 unicast-routing global configuration command. This command globally enables IPv6 and must be the first command executed on the router
2. configure an IPv6 global unicast address on an interface using the ipv6 address address/prefix-length [eui-64] command. If you omit omit the eui-64 parameter you must configure the entire address manually.
2. configure an IPv6 global unicast address on an interface using the ipv6 address address/prefix-length [eui-64] command. If you omit omit the eui-64 parameter you must configure the entire address manually.
Here is an IPv6 Configuration Example:
We can verify that the IPv6 address has been configured by using the show ipv6 interface fa0/1 command:
From the output above we can verify two things:
1. the link local IPv6 address has been automatically configured
2. the global IPv6 address has been created using the modified EUI-64 method
2. the global IPv6 address has been created using the modified EUI-64 method