Implementing Cisco Enterprise Wireless Networks (ENWLSI) — Question 72

An engineer configured a Cisco AireOS controller with two TACACS+ servers. The engineer notices that when the primary TACACS+ server fails, the WLC starts using the secondary server as expected, but the WLC does not use the primary server again until the secondary server fails or the controller is rebooted. Which cause of this issue is true?

Answer options

• A. Fallback is enabled
• B. Fallback is disabled
• C. DNS query is disabled
• D. DNS query is enabled

Correct answer: B

Explanation

The correct answer is B, indicating that fallback is disabled. This means that once the WLC switches to the secondary TACACS+ server after the primary fails, it will not attempt to revert back to the primary server until a failure occurs or the controller is rebooted. If fallback were enabled, it would automatically switch back to the primary server once it becomes available again.