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cbt nuggets ccna 200 301 download.Neighbor ID mi 3.3.3.3 Pri 1 1 1 1 State FULL/BDR 2WAY/DROTHER FULL/DR Dead Time 00:00:37 00:00:37 00:00:31 ^ddresb MM Interface GigabitEthernet0/0 GigabitEthernetO/0 GigabitEthernet0/0First, note the Neighbor ID (identification) in the first column, which identifies the neighbor by its Router ID (RID). For this example network, all four routers use the easy-to-guess RID. looking further to the right, the Address column shows the IP address of the interface used by that neighbor on the common subnet.A general look at the OSPF neighbor status information in this example (see Chapter 8 for a related explanation) helps to understand some of the subtleties in the output. The state of each OSPF neighbor router listed by the router, the neighbor state, should be fixed to two-way (bidirectional) or fidl (full) state under normal operation. For neighbors that do not need to exchange databases directly, typically two non-DR routers in a LAN, the router should be fixed to the two-way neighbor state. In most cases, the two neighboring routers need to exchange their complete LSDBs directly with each other. once the exchange process is complete, the two routers are fixed to the Full neighbor state.In Example 11-10, router R4 is a DR and R1 is a standby (BDR), so R2 and R3 (as non-DRs) do not need to exchange route information directly.So R2 and R3 (as non-DR) do not need to exchange routing information directly. Note: Note that OSPF neighbors do not need to use the same process ID in the routerospfprocess-id command to be neighbors. In Example 11-10, all 4 routers use different PIDO 'If the showipospfneighbor command does not list the desired neighbor or neighbors, you should confirm that the two routers on the local subnet can ping through to each other before proceeding to the OSPF neighbor requisites. Once you have determined that the two neighboring routers can ping through to each other, and the two routers still cannot be OSPF neighbors, the next step is to review each OSPF neighbor requirement. Table 11-4 summarizes these requisites and lists the most useful commands to find out the answer.U words if Table 11 -4 OSPF Neighbor Necessities and the Best show/debug CommandsNecessities Best commands for isolating problemsMust be on the same subnet show interfaces, debug ip ospf helloMust pass any neighbor verification show ip ospf interface, debug ip ospf adj