Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 99

A customer has a central Cisco WLC that manages APs in FlexConnect mode. The wireless infrastructure supports multiple small branches. One branch deploys new CCX wireless phones that are authenticated by a central Cisco ISE via PEAP/IMSCHAPv2, and traffic is switched locally. The customer must reduce the number of full authentication requests and optimize roaming for the new phones. Which action accomplishes the requirement?

Answer options

• A. Enable CCKM on the voice SSID and add APs to a FlexConnect group.
• B. Enable Aironet IE on the voice SSID and add APs to an AP group.
• C. Enable Aironet IE on the voice SSID and add APs to a FlexConnect group.
• D. Enable CCKM on the voice SSID and add APs to an AP group.

Correct answer: A

Explanation

Enabling CCKM (Cisco Centralized Key Management) on the voice SSID allows for fast re-keying and reduces the need for full authentication during roaming, which is crucial for maintaining call quality on CCX wireless phones. Options B and C involve Aironet IE, which does not address the authentication request reduction as effectively as CCKM. Option D suggests using an AP group rather than a FlexConnect group, which is not optimal for the FlexConnect mode setup.