Cisco Certified Network Associate (CCNA) Practice Exam

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What configuration command is necessary to configure an OSPF v3 router?

#ipv6 router ospf PROCESS NUMBER
#interface INTERFACE
#router ospf
passive-interface INTERFACE

The correct answer is: #ipv6 router ospf PROCESS NUMBER

The command to configure Open Shortest Path First (OSPF) for IPv6, known as OSPFv3, includes the syntax that specifies the OSPF process number linked to the router. This is crucial because OSPFv3 operates with a process that handles its routing functionality, allowing for multiple OSPF processes on a single router, which can be useful for managing different routing instances or configurations. By using the command that includes "ipv6 router ospf" followed by a process number, you effectively initiate the OSPF protocol for IPv6 address families, establishing the necessary routing protocol configuration. This command is essential for enabling OSPFv3 on a router, allowing it to participate in the routing of IPv6 networks. Other options deal with different aspects of router configuration. While configuring interfaces and passive interfaces are important in routing setups, they do not specifically initiate OSPFv3 functionality directly. To leverage OSPFv3, starting with the correct command for the OSPF process is vital.