Cisco Certified Network Associate (CCNA) Practice Exam

Which of the following is a command used to troubleshoot OSPFv3 networks?

1. #show ipv6 interface status

2. #show ipv6 ospf neighbor

3. #show ip protocols

4. #show ipv6 route

The correct answer is: #show ipv6 ospf neighbor

The command to troubleshoot OSPFv3 networks is focused on helping network engineers verify the OSPFv3 neighbor relationships. By using the command that displays information about OSPF neighbors, you can assess the adjacency states and any potential issues affecting OSPFv3 operation. Specifically, the command offers insight into the status of OSPF neighbors, including their state (such as Full, 2-Way, etc.), the router IDs of neighboring devices, and key timers that are critical for OSPF operations. This information is vital for diagnosing connectivity issues and ensuring that routers are forming adjacencies correctly, which is fundamental to a functioning OSPF topology. Other commands listed do serve important functions but do not specifically target troubleshooting OSPFv3. For example, the command that shows interface status pertains to general IPv6 interface states, not specifically OSPF. The command for displaying IP protocols provides an overview of routing protocols configured on the router but lacks detailed neighbor relationship information. Lastly, the command that shows the routing table displays active routes but does not provide insight specific to OSPFv3 operation or neighbor adjacency status. Therefore, the command focused on OSPF neighbors is essential for effectively troubleshooting OSPF