Troubleshooting and Maintaining Cisco IP Networks (TSHOOT, legacy) — Question 3

Which scenario would cause the tunnel interface on a router to show a status of down/down?

Answer options

• A. The source physical interface is in a down/down state
• B. The destination router's physical interface is shut down
• C. The shutdown command has been issued on the virtual interface
• D. The destination address is missing on the tunnel configuration A

Correct answer:

Explanation

The correct answer is A because if the source physical interface is down, it will directly affect the tunnel interface, causing it to also show a status of down/down. Options B and C are incorrect as they refer to the state of the destination router's interface and virtual interface, respectively, which do not directly impact the source's tunnel status. Option D is also incorrect because while a missing destination address can cause issues, it does not guarantee a down/down status if the source interface is operational.