ccna in telecom

ccna in telecom.Se0/0/l 1 0/0 1037 7/190 6602 0 The above output information indicates that router R2 has 2 interfaces running IPv6 EIGRPoChapter 17 OSPFThe OSPF routing protocol is a typical link-state routing protocol that overcomes the shortcomings of distance vector routing protocols that rely on neighbors for routing decisions and is very widely used. OSPF is a routing protocol based on the SPF algorithm, and in 1989, the OSPFvl specification was published in RFC 1131, but OSPFvl was an experimental routing protocol that did not gain implementation. In 1991, OSPFv2 was introduced in RFC 1247, and by 1998, the OSPFv2 specification was updated in RFC 2328, the current RFC version of OSPF. In 1999, OSPFv3 for IPv6 was published in RFC 2740. This chapter focuses on OSPF features, terminology, packet types, network types, neighbor relationship establishment, OSPF operation steps, comparison of OSPFv2 and OSPFv3, and OSPFv2 and OSPFv3 configuration. References to OSPF in this chapter represent OSPFv2 if not otherwise specified.17.1 OSPF Overview17.1.1 OSPFv2 FeaturesOSPF (OpenShortestPathFirst), an InteriorGateway Protocol (IGP), is used to exchange routing information between routers in the same Autonomous System (AS). The routers running OSPF exchange and store link state information about the entire network with each other, thus keeping track of the topology of the entire network and calculating routes independently. The features of OSPF are described below.Fast convergence speed for larger networks.It is a classless routing protocol that supports discontiguous subnets, VLSM and CIDR, and manual route summarization.Uses multicast (224.0.0.5 or 224.0.0.6) updates and supports equivalence load balancing.supports area segmentation to form a structured network, providing hierarchical management of routes, thereby enabling less frequent computation of SPF