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CCNP Routing and Switching ROUTE 300-101 Official Cert Guide, Video Enhanced Edition by Kevin Wallace

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OSPF Link-State Concepts

ImageLesson 1: OSPF Fundamentals

OSPF uses link-state (LS) logic, which can be broken into three major branches. The first step, neighbor discovery, has the same overall goal as EIGRP’s neighbor discovery process: to find the neighboring routers and exchange enough information so that the two routers know whether they should exchange topology data. (Like EIGRP, OSPF keeps a list of neighbors in its neighbor table.)

The second step, topology database exchange, requires each OSPF router to cooperate by sending messages so that all routers learn topology information—information that is the equivalent of the kinds of information ...

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