Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 221
A university has three campus locations and the main data center. Each campus location has a Cisco Catalyst 9800-40 WLC that manages 600 APs. The data center has a Catalyst 9800-40 WLC, which serves as an N+1 backup for each campus WLC. A consulting engineer must install four additional Catalysts 9800-40 WLCs to serve as the high availability SSO pair for each campus, but only two have been approved due to budget restrictions. The new WLCs must be implemented using these requirements:
• Data center WLC must always be available as N+1 backup to either campus WLC.
• Campus1 WLC must operate with zero downtime.
• In the event of multiple campus outages, the AP priority order is to support Campus3, Campus2, and then Campus1.
• Each campus acts as either secondary or tertiary backup to another campus, with data center WLC always being the primary.
What design approach must the consulting engineer take?
Answer options
- A. The data center WLC and Campus3 WLC are the high availability SSO pair. Campus3 APs have priority 4, Campus2 APs have priority 2, and Campus1 APs have priority 1.
- B. The data center WLC and Campus1 WLC are the high availability SSO pair. Campus 1 APs have priority 4, Campus2 APs have priority 2, and Campus3 APs have priority 1.
- C. The data center WLC and Campus3 WLC are the high availability SSO pair. Campus1 APs have priority 4, Campus2 APs have priority 2, and Campus3 APs have priority 1.
- D. The data center WLC and Campus1 WLC are the high availability SSO pair. Campus3 APs have priority 4, Campus2 APs have priority 2, and Campus1 APs have priority 1.
Correct answer: D
Explanation
The correct answer is D because it ensures that Campus1, which must operate with zero downtime, is paired with the data center WLC for high availability. This configuration allows Campus3 and Campus2 to support each other's APs in a prioritized manner during outages, adhering to the specified priority order of Campus3, Campus2, and Campus1. The other options do not meet the requirement for Campus1's uninterrupted operation or the correct AP priority order.