Once again, Open Shortest Path First is an open-standard Link State routing protocol that advertises the state of its links. When a Link State router begins operating on a network link, information associated with that logical network is added to its local Link State Database (LSDB). The local router then sends Hello messages on its operational links to determine whether other Link State routers are operating on the interfaces as well. OSPF runs directly over Internet Protocol using IP number 89.
While it is not possible to delve into all potential OSPF problem scenarios, the sections to follow discuss . . .
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