Cisco Certified Network Associate (200-301 CCNA) – Question479


Refer to the exhibit. Router OldR is replacing another router on the network with the intention of having OldR and R2 exchange routes. After the engineer applied the initial OSPF configuration, the routes were still missing on both devices. Which command sequence must be issued before the clear IP ospf process command is entered to enable the neighbor relationship?

A. OldR(config)#interface g0/0/0
OldR(config-if)#ip ospf hello-interval 15
B. OldR(config)#router ospf 1
OldR(config-router)#network 192.168.1.0 255.255.255.0 area 2
C. OldR(config)#interface g0/0/0
OldR(config-if)#ip ospf dead-interval 15
D. OldR(config)#router ospf 1
OldR(config-router)#no router-id 192.168.1.1

Correct Answer: D

Explanation:

Explanation:
With OSPF each router must have a unique router ID. Here we see that both routers have a router ID of 192.168.1.1. Removing the router-id command on the OldR will force it to use one of its actual interface IP addresses as the router ID.