The hierarchical design of OSPF allows a collection of networks to be grouped into a logical area.
All default and command parameters can be modified.Ĭhanges between OSPF for IPv4 and OSPF3 for IPv6 include the following: Routers running OSPF can be enabled with minimal configuration. Nokia’s implementation of OSPF conforms to OSPF Version 2 specifications presented in RFC 2328, OSPF Version 2 and OSPF Version 3 specifications presented in RFC 2740, OSPF for IPv6. When a router is started with OSPF configured, OSPF, along with the routing-protocol data structures, is initialized and waits for indications from lower-layer protocols that its interfaces are functional. The resulting OSPF forwarding table is submitted to the routing table manager to calculate the routing table. Each router applies the Dijkstra algorithm to calculate the shortest path to each destination in the network. The information exchange enables all participating routers to establish a network topology map. OSPF routers exchange state, cost, and other relevant interface information with neighbors.
OSPF is an interior gateway protocol (IGP) used within large autonomous systems (ASs). Open Shortest Path First (OSPF) is a hierarchical link state protocol.
