When a router has a heavy load and cannot forward any other packets, you can configure it as a stub router. After the router is configured as a stub router, other OSPFv3 devices do not use this router to forward data but they can have a route to this stub router.
ospfv3 [ process-id ]
stub-router [ on-startup [ interval ] ]
There is no correlation between the stub router configured through this command and the router in the stub area.