Exam 300-430 topic 1 question 131 discussion

Actual exam question from Cisco's 300-430

Question #: 131
Topic #: 1

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?

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

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Suggested Answer: B 🗳️

by kthekillerc at Nov. 8, 2021, 10:18 p.m.

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Ocsicccnp

7 months, 3 weeks ago

Selected Answer: B

In off mode, the WLC supports failover only. In other words, fallback is disabled. When the primary RADIUS server goes down, the WLC will failover to the next active-backup RADIUS server. The WLC continues to use the secondary RADIUS server forever, even if the primary server is available. https://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/106258-radius-fbkftr-wlc-config.html#anc7:~:text=In%20off%20mode%2C%20the%20WLC%20supports%20failover%20only.%20In%20other%20words%2C%20fallback%20is%20disabled.%20When%20the%20primary%20RADIUS%20server%20goes%20down%2C%20the%20WLC%20will%20failover%20to%20the%20next%20active%2Dbackup%20RADIUS%20server.%20The%20WLC%20continues%20to%20use%20the%20secondary%20RADIUS%20server%20forever%2C%20even%20if%20the%20primary%20server%20is%20available.

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