Designing Cisco Enterprise Wireless Networks (ENWLSD) — Question 167

A customer has this wireless design:
• two Cisco Catalyst 9800 Series wireless controllers that are configured in a high-availability SSO cluster to manage the APs in a local office network
• 100 APs in local mode that are registered to the high-availability cluster
• one Catalyst 9800 Series wireless controller that is deployed as an anchor in a DMZ
• a CAPWAP tunnel in UP state between the high-availability cluster and the anchor WLC

The customer wants the anchored traffic to remain up if a single WLC in the high-availability cluster fails. How must this requirement be incorporated into the design?

Answer options

• A. Configure the APs with the high-availability cluster as the primary base.
• B. Deploy EMC APs as anchors and configure a high-availability cluster.
• C. Create a separate EoIP tunnel for each WLC in the high-availability cluster.
• D. Configure the mobility MAC address for the high-availability cluster.

Correct answer: D

Explanation

Configuring the mobility MAC address for the high-availability cluster ensures that the traffic will continue to flow even if one of the WLCs fails, as it allows for smoother failover. The other options do not address the requirement effectively; for instance, using EMC APs or creating separate EoIP tunnels does not ensure continuity of service during a failure of a single WLC.