Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 186

An engineer created a design where the HQ has a Cisco 5520 Wireless LAN Controller with 2000 APs associated to it. If a controller at one of the remote sites fails, the APs at that site fall back to a central controller. Global AP Failover Priority must be enabled. Which design approach must be taken to prevent the critical APs at HQ from going down and still allow APs to failover to the HQ controller?

Answer options

• A. Set all the APs at HQ to a failover priority of "high" and set the remote site APs to "normal".
• B. Set all the APs at HQ to a failover priority of "medium" and set the remote site APs to "high".
• C. Ensure that the critical APs at HQ have a failover priority of "critical", leave the rest of the HQ APs at "medium", and set the remote site APs to "high".
• D. Create an access list on the HQ router that blocks CAPWAP discovery on UDP port 5246 so that the remote APs cannot kick off the APs at HQ.

Correct answer: C

Explanation

The correct answer is C because it ensures that the most important APs at HQ maintain the highest failover priority, preventing them from going down while allowing remote APs to failover. Options A and B do not protect the critical APs adequately, and D would block the necessary communication for failover, which is counterproductive to the goal.