Cisco Certified Network Associate (CCNA) Practice Exam

Which command would you use to confirm that interfaces are up/up in an OSPFv3 network?

1. #show ipv6 interface status

2. #show ipv6 interface brief

3. #show ipv6 ospf interfaces

4. #show ipv6 routing table

The correct answer is: #show ipv6 interface brief

Using the command to display a brief overview of IPv6 interfaces is the most effective way to confirm that interfaces are in an up/up state within an OSPFv3 network. When you execute this command, it provides a succinct snapshot of the operational status of each interface, including whether they’re administratively up or down, as well as their link status. This information is crucial, as OSPFv3 requires that interfaces be up for successful neighbor adjacency formation and route exchange. The status shown by this command allows network engineers to quickly verify the operational state of interfaces and ensure that they are eligible for OSPFv3 participation. If an interface is down, it will not participate in OSPF routing, leading to potential issues in network connectivity and route propagation. Other commands might provide information regarding specific aspects of OSPF or the routing table but do not offer a straightforward overview of interface statuses. For example, while examining OSPF-specific interfaces or the routing table can provide deeper insights into routing dynamics, it is not as direct for confirming that the interfaces themselves are operational and ready to work within the OSPFv3 process as the command used.