Cisco Certified Network Associate (CCNA) Practice Exam

How do you set the router ID for OSPFv3?

1. (config-router)#router-id ROUTER ID

2. (config)#ipv6 router ospf PROCESS NUMBER

3. (config)#set ospf router-id ROUTER ID

4. (config)#ospfv3 router-id ROUTER ID

The correct answer is: (config-router)#router-id ROUTER ID

Setting the router ID for OSPFv3 involves specifying the router ID in the OSPF configuration context. The correct method to set the router ID in OSPFv3 is to enter the OSPF configuration mode and use the specific command that clearly defines the router ID format as it is part of the router settings. In this case, using the command that includes "router-id" within the OSPF configuration context directly indicates which router ID should be assigned to the OSPF routing process. This ensures clear identification of the router within the OSPF domain which is crucial for routing decision processes. The other methods provided do not directly address how to configure the router ID specifically for OSPFv3. They either pertain to general OSPF configuration or incorrectly reflect the required command format for the router ID setting. Thus, focusing on the clarity and specific context of the command reflects the correct understanding of OSPFv3 configurations.