Priority-based OSPF Convergence
Priority-based OSPF convergence ensures that specific routes converge first when a great number of routes need to converge. Different routes can be configured with different convergence priorities. This allows important routes to converge first and therefore improves network reliability.
By using priority-based OSPF convergence, you can assign a higher convergence priority to routes for key services so that these routes can converge fast and the impact on key services is reduced.