Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 197

A customer is transitioning the wireless network from a legacy Cisco AirOS-based WLC to a new Cisco IOS XE-based WLC that includes next generation APs. During the transition, the two systems must coexist while the APs are being migrated. The customer requires that users connected to either system maintain their IP address and security posture when roaming between APs on the same controller and different controllers. Which design approach must the engineer take for the legacy and next-generation WLCs?

Answer options

• A. Use high availability in an Active/Active state cluster pair between the two WLCs.
• B. Use a mobility tunnel that supports control channel encryption between the two WLCs.
• C. Use a mobility tunnel that supports data channel encryption between the two WLCs.
• D. Use high availability in an Active/Active N+1 state cluster pair between the two WLCs.

Correct answer: C

Explanation

The correct answer is C because a mobility tunnel that supports data channel encryption ensures that user data is securely transmitted while maintaining their IP address and security posture during roaming. Options A and D do not address the data channel encryption required for secure roaming, while option B focuses only on control channel encryption, which does not fulfill the customer's requirement for user sessions.