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CCNP ROUTE 642-902 Official Certification Guide by Wendell Odom

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Chapter 6. OSPF Topology, Routes, and Convergence

This chapter covers the following subjects:

LSAs and the OSPF Link State Database: This section examines LSA Types 1, 2, and 3, and how they allow OSPF routers to model the topology and choose the best routes for each known subnet.

The Database Exchange Process: This section details how neighboring routers use OSPF messages to exchange their LSAs.

Choosing the Best Internal OSPF Routes: This section examines how OSPF routers calculate the cost for each possible route to each subnet.

OSPF and EIGRP both use three major branches of logic, each of which populates a different table: the neighbor table, the topology table, and the IP routing table. This chapter examines topics related to the OSPF ...

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