Routers R1 and R2 are directly connected. The process is explained in the following figure: Hello packets are sent to the multicast IP address of 224.0.0.5. OSPF neighbors are dynamically discovered by sending Hello packets out each OSPF-enabled interface on a router. OSPF routers need to establish a neighbor relationship before exchanging routing updates. Topology table – stores the topology structure of a network.Neighbor table – stores information about OSPF neighbors.Because each router knows the entire topology of a network, the chance for a routing loop to occur is minimal.Įach OSPF router stores routing and topology information in three tables: Each OSFP router then runs SFP algorithm to calculate the best routes and adds those to the routing table. Instead, they exchange information about network topology. Because OSPF is a link state routing protocol, neighbors don’t exchange routing tables. Routers running OSPF have to establish neighbor relationships before exchanging routes. uses multicast addresses 224.0.0.5 and 224.0.0.6 for routing updates.the administrative distance of OSPF routes is, by default, 110.uses only one parameter as the metric – the interface cost.
#Router on a stick ospf required manual#
supports VLSM, CIDR, manual route summarization, equal cost load balancing.Here are the most important features of OSPF: OSPF will run on most routers that doesn’t necessarily have to be Cisco routers (unlike EIGRP which can be run only on Cisco routers). Because it is an open standard, it is implemented by a variety of network vendors. OSPF (Open Shortest Path First) is a link state routing protocol.
0 kommentar(er)
