Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to configure OSPFv3 on R1?

1. ipv6 router ospf 1

2. ospf network type point-to-point

3. ipv6 ospf 1 area 0

4. router ospf 1

The correct answer is: ipv6 ospf 1 area 0

To configure OSPFv3, which is the IPv6 version of Open Shortest Path First, the appropriate command begins with "ipv6 router ospf" followed by a process ID. Thus, the command intended to start the OSPFv3 configuration on a router is "ipv6 router ospf 1." This command initializes the OSPFv3 process and is the correct way to begin the OSPF configuration for an IPv6 network. After initiating the OSPFv3 process, additional commands can be used to specify networks and areas into which OSPFv3 will operate. For example, you would typically follow up with commands that reference which interfaces should participate in OSPFv3, detailing the area identifiers. The selection that includes "ipv6 ospf 1 area 0" incorrectly suggests a command structure that doesn't exist in the context of OSPFv3. The correct command should be specifically to initiate the OSPF process for IPv6, rather than attempting to directly set an area without first enabling OSPFv3. In summary, to configure OSPFv3 on R1 and establish a routing protocol framework for IPv6, the correct command is "ipv6