When using the CloudCampus app to test performance multiple times, the speed was 20 Mbps for three times, and then it reached 900 Mbps again. Which of the following configurations should be adjusted…

Question

Options

• A[WAC-wlan-traffic-prof-default] scan-disable
• B[WAC-wlan-traffic-prof-default] sta-load-balancedynamic disable
• C[WAC-wlan-traffic-prof-default] rate-limit clientdynamic disable
• D[WAC-wlan-traffic-prof-default] calibrate auto-txpower-select disable

• A
  18% (5)
• B
  4% (1)
• C
  71% (20)
• D
  7% (2)

Explanation

Option C is correct because Huawei's WAC dynamic client rate limiting (rate-limit clientdynamic) detects repeated high-bandwidth activity - in this case, consecutive speed tests - and temporarily throttles the client to ~20 Mbps as a "heavy user" penalty, before the limit resets and full speed (900 Mbps) returns. Disabling this feature stops that automatic throttling behavior.

Option A (scan-disable) controls background radio scanning on the AP, which has no effect on client throughput patterns. Option B (sta-load-balance dynamic disable) manages client steering across APs for load distribution - it might cause a client to roam, but not produce a repeating slow/fast speed cycle. Option D (calibrate auto-txpower-select disable) relates to automatic transmit power adjustment during RF calibration, which affects signal strength globally rather than throttling a specific client's rate.

Memory tip: Think "3 strikes, you're throttled" - the dynamic rate limiter counts repeated speed tests as bandwidth abuse and penalizes the client temporarily. If you see a pattern of N slow results followed by a reset to full speed, the culprit is always dynamic rate limiting on the client (clientdynamic).

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