What is OSPFv3 ?
OSPFv3 is a link-state routing protocols as its predecessor in IPv4. It still uses the autonomous areas to separate networks into areas.
OSPFv3 uses an IPv6 multicast address range of FF02::5 for ospf routes and FF02::6 for ospf designated routers when sending updates and acknowledgements.
OSPF routers generate routing updates only when a change occurs in the network topology.
When a route link changes state, the network device that detects the change creates an link State Advertisement (LSA) and forwards it to the DR using FF02::6 multicast address who informs all devices within an area using FF02::5 multicast address. Each device then updates its Link State Database.
One of the new features of OSPFv3 is the ability to assign the router ID, area ID and link-state ID with a 32 bit value without IP addresses. This feature enables OSPFv3 to be routable over almost any network layer protocol. Like other IPv6 routing protocols – RIPng and EIGRPv6, you must enable it directly on the router interface for the process to work.
OSPFv3 Configuration Requirements.
* Enable IPv6 unicast routing
* Enable the OSPFv3 routing process
* Enable OSPFv3 on the interface
* Configure passive interfaces to suppress routing updates to and from an interface.
The interface configuration process is just to assign an ospfv3 process ID and area.