Notice that the neighbor state is FULL, indicating that the two routers have successfully formed
an OSPF adjacency. The routing table veri?¬?es that the 10.2.2.2 address has been learned via OSPF
over the serial connection.
The results of a ping to the Router Y loopback interface address are also displayed to illustrate that
the link is working, as shown in Example 4-11.
Summary of OSPF Introduction
The following summarizes the key points that were discussed in this section:
?– OSPF is a classless, link-state routing protocol that uses an area hierarchy for fast
convergence.
?– OSPF exchanges hello packets to establish neighbor adjacencies between routers.
?– The SPF algorithm uses a cost metric to determine the best path. Lower costs indicate a better
path.
?– The router ospf process-id command is used to enable OSPF on the router.
Example 4-10 Verifying Authentication with the show ip ospf neighbor and show ip route Commands
RouterX#sshhooww iipp oossppff nneeiigghhbboorr
Neighbor ID Pri State Dead Time Address Interface
10.2.2.2 0 FULL/ 00:00:32 192.168.1.102 Serial0/0/1
RouterX#sshhooww iipp rroouuttee