350-401 Question 199
Single answerAn enterprise network has two routers configured as part of a redundancy group using HSRP. The network administrator notices that Router A is always acting as the active router, even though Router B has a higher priority. What could be the most likely reason for this behavior?
- A
Router A is configured with the 'preempt' command.
- B
Router B is not configured with the 'preempt' command.
- C
Router A has a lower HSRP priority than Router B.
- D
Router B is in a different HSRP group than Router A.
Show answer and explanation
Correct answer: B
Explanation
In HSRP, the active router is determined by the router with the highest priority. However, for a router with a higher priority (Router B) to take over as the active router, the 'preempt' command must be configured. Without preemption enabled, the current active router (Router A) will remain active regardless of its priority.
- A. Incorrect.
Router A being configured with the 'preempt' command would allow it to take over as the active router if its priority is higher, but this does not explain why Router A remains active when Router B has a higher priority.
- B. Correct.
If Router B is not configured with the 'preempt' command, it will not take over as the active router even if it has a higher priority, which is the most likely scenario here.
- C. Incorrect.
If Router A has a lower HSRP priority, it should not remain the active router unless preemption is not enabled on Router B. The priority alone does not determine the active router in this case.
- D. Incorrect.
If Router B is in a different HSRP group than Router A, they would not participate in the same redundancy group, but the question assumes they are part of the same HSRP group.