Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > OSPF > Dijkstra SPF Algorithm > The Neighbor, Topology, and IP Routing Table
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > OSPF > IP Routing Table > The Neighbor, Topology, and IP Routing Table
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > OSPF > LSDB (Link State Database; or OSPF Topology Table; or OSPF Database) > The Neighbor, Topology, and IP Routing Table
Root: WRM Database > Information Technology > Certifications > CCNA > Routing Protocols > OSPF > OSPF Neighbor Table > The Neighbor, Topology, and IP Routing Table



The Neighbor, Topology, and IP Routing Table


OSPF routers send messages to learn about neighbors, listing those neighbors in the OSPF neighbor table. OSPF routers then send messages to exchange topology data with these same neighbors, sharing the information in the OSPF topology table, more commonly called the LSDB or the OSPF database. To fill the third major table used by OSPF, the IP routing table, OSPF does not send any messages. Each router runs the Dijkstra SPF algorithm against the OSPF topology database, choosing the best routes based on that process.







References

Odom, Wendell (2008) CCNA ICND2 Official Exam Certification Guide, Second Edition. Indianapolis: Cisco Press.