CCNP Routing and Switching TSHOOT 300-135: Official Cert Guide

Troubleshooting OSPFv2 Neighbor Adjacencies

To verify OSPFv2 neighbors, you use the show ip ospf neighbor command. In Example 15-1, you see a sample output of the show ip ospf neighbor command. It lists the neighbor ID, which is the router ID (RID) of the neighbor, the priority of the neighbor for the designated router / backup designated router (DR/BDR) election process, the state of the neighbor (covered shortly), and whether they are a DR, BDR, or DROther. In addition, it displays the dead time, which is how long the local router will wait until it declares the neighbor down if it does not hear another hello packet within that time (default is 40 seconds on a LAN). You can also see the neighbor’s interface IP address that they sent the hello ...