350-401 · Question #1132
350-401 Question #1132: Real Exam Question with Answer & Explanation
The correct answer is B: Open CAPWAP UDP ports 5246 and 5247 in the network firewall.. To enable CAPWAP APs to communicate with a wireless controller through a firewall, the standard CAPWAP UDP ports 5246 (control) and 5247 (data) must be opened.
Question
A Cisco administrstor deploys a new wireless network but CAPWAP APs cannot communicate with the wireless controller. IP connectivity in the network functions properly. Which action resolves the issue?
Options
- AOpen CAPWAP UDP port 12222 in the network firewall.
- BOpen CAPWAP UDP ports 5246 and 5247 in the network firewall.
- CEnable the UDP Lite feature on the WLC.
- DEnsure that the controller is connected to a AAA server.
Explanation
To enable CAPWAP APs to communicate with a wireless controller through a firewall, the standard CAPWAP UDP ports 5246 (control) and 5247 (data) must be opened.
Common mistakes.
- A. UDP port 12222 is not the standard CAPWAP port; it is used by LWAPP, the predecessor to CAPWAP.
- C. UDP Lite is a feature that provides partial checksums for UDP, but it does not resolve issues related to blocked CAPWAP ports by a firewall.
- D. A AAA server is used for authenticating users and managing access, not for the underlying CAPWAP communication between APs and the WLC itself.
Concept tested. CAPWAP port requirements for WLC communication
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