Hi Terry, I tried to exchange the APs, But It had still the problem. After that I checked the RF profile in dashboard, I found the RF profile not auto channel width (locked channel width 20 MHz in 5GHz, But the SNR 30dB+ of 5G) when I enabled auto channel width in the RF profile. the problem from ping lost didn't occur and network system worked flow, But the ping time (Latency) have gotten to still higher then normally. 1. Why the result of auto channel width can decrease the problem ? 2. Why the network worked normally, but the latency have gotten to still higher (Sometime latency < 500) ??
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