Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 141

A customer has two Cisco wireless controllers named WLC-A and WLC-B. Each controller is in a different building on a campus. The WLCs have different Layer 3 interfaces and broadcast the same SSIDs from their respective APs. Users must remain connected to the same VLAN and maintain their IP addresses during roaming from the APs that are attached to WLC-A and WLC B. Which action accomplishes the requirement?

Answer options

• A. Create a mobility group between the two WLCs to allow auto-anchoring.
• B. Create an SSO cluster to ensure that client sessions sync between WLCs.
• C. Enable 802.11r on each SSID on both WLCs to allow caching of the PMK.
• D. Enable AP groups using the same name on both WLCs for each group.

Correct answer: A

Explanation

Creating a mobility group between WLC-A and WLC-B allows for seamless roaming and maintains session information, ensuring users can stay connected to the same VLAN. The SSO cluster option does not address the requirement for roaming between different Layer 3 interfaces. Enabling 802.11r is beneficial for faster handoffs but does not ensure VLAN consistency or IP address retention. Similarly, using AP groups with the same name does not provide the necessary roaming capabilities between the two controllers.