Cisco Certified Network Associate (CCNA) Practice Exam

What command can be used to verify that Router IDs are unique in an OSPFv3 network?

1. #show ipv6 routing

2. #show ipv6 ospf interface

3. #show ipv6 ospf

4. #show ipv6 route summary

The correct answer is: #show ipv6 ospf

Using the command to display OSPF information is essential for verifying that Router IDs are unique within an OSPFv3 network. This command provides detailed information about the OSPFv3 configuration, including the Router IDs assigned to each OSPFv3 router. By examining the output of this command, network administrators can ensure that each router has a unique identifier, which is crucial for preventing routing issues and maintaining the stability of the OSPFv3 topology. Other commands, while useful for different purposes, do not directly provide the necessary information about Router IDs. For instance, commands related to routing tables or interface statistics may not specifically address OSPF configurations or the uniqueness of Router IDs. Thus, using the appropriate OSPF-specific command is critical for confirming that the network is configured correctly, allowing for efficient OSPF operation and troubleshooting.