Cisco Certified Network Associate (CCNA) Practice Exam

What command is used to propagate the default-gateway in an OSPFv3 network?

1. enable ospf

2. ipv6 router ospf

3. (config)#default-information originate

4. (config-router)#default-information propagate

The correct answer is: (config)#default-information originate

The command used to propagate the default gateway in an OSPFv3 network is indeed identified correctly. When you utilize the command to originate default information, you enable the router to advertise a default route to its OSPFv3 neighbors. This is particularly essential in OSPF routing, as it allows devices within the OSPF domain to use the default route for traffic that does not have a more specific matching route. This command works effectively in ensuring that all OSPF routers within the area recognize the default route, facilitating streamlined routing decisions, especially for outbound traffic that does not match any other routes in the routing table. The command is intended for use in the router configuration mode of the specific OSPF instance, making it integral to the OSPF implementation for default routing. Other options provided don't correctly fulfill the requirement to propagate a default gateway in the context of OSPFv3. For instance, simply enabling OSPF or using states related to OSPF configuration does not directly encompass the specific command needed for default-information propagation.