Somewhat similar to Named EIGRP, the OSPFv3 Address Family configuration approach lets you support the routing of both IPv4 and IPv6 under a single OSPF process. With such a configuration, there is a single link-state database containing information for both IPv4 and IPv6 networks. The steps to configure OSPFv3 using the Address Family approach are as follows:
Step 1. Start the OSPFv3 routing process with the router ospfv3 process-id command.