300-425 Question 2
Single answerA university campus deploys FlexConnect access points in its remote buildings to maintain wireless connectivity during WAN link failures. However, during a recent WAN outage, students reported losing access to the internet, even though the local network was operational. What configuration step did the network administrator likely miss to ensure internet access in this scenario?
- A
Enable FlexConnect Local Switching on the access points.
- B
Enable VLAN-based central switching on the WLAN.
- C
Configure a backup RADIUS server that is reachable locally.
- D
Enable FlexConnect Local Authentication on the WLAN.
Show answer and explanation
Correct answer: D
Explanation
When deploying FlexConnect in remote sites, enabling Local Authentication is critical to ensure client devices can authenticate to the WLAN during WAN outages. If Local Authentication is not enabled, clients will lose connectivity even when Local Switching is configured, as the access point will still attempt to reach the controller for authentication. By enabling Local Authentication, the AP can authenticate clients locally, ensuring uninterrupted connectivity.
- A. Incorrect.
FlexConnect Local Switching ensures traffic is switched locally at the access point rather than being tunneled back to the controller. This helps during WAN outages but does not address authentication, which is the issue in this scenario.
- B. Incorrect.
VLAN-based central switching routes all traffic through the controller, which is not ideal for WAN outage scenarios. This option would not solve the problem described.
- C. Incorrect.
While a backup RADIUS server can help with authentication in some cases, it would not necessarily resolve the issue unless it was specifically configured to handle local authentication requests.
- D. Correct.
FlexConnect Local Authentication allows authentication to occur locally at the access point without requiring a connection to the central controller. This configuration is essential for maintaining client connectivity when the WAN link to the controller is down.