Wifi intermittent - C9800-CL Wireless Controller

[Electronic20]

There is a problem with a 5-second drop in Wi-Fi randomly at any time, the strange thing is that it does not happen equally to all, one client may be fine but the other has a 5-second drop.

I have this image as an example of its client parameters:

What would be the optimal thresholds or between what values should the following parameters be, according to the image, so that the client does not have Wi-Fi drop problems:

Number of Policy Errors
Radio Signal Strength Indicator
Signal to Noise Ratio

[Flavio Miranda]

Hi

 What I can say is that the signal for this client on that moment was excellent.  -64dBm RSSI and most important 34 dB SNR is probably the best condition a client might have.

 Whatever is the problem, for sure it is not related to the signal on that moment.

Share the WLC version, this can be a bug, for example. And look the logs, they can show you something.

[Electronic20]

thank you,

This is the device and the firmware version:

Cisco Catalyst 9800-CL Wireless Controller
17.6.4

Regarding the thresholds, what would they be? Up to what value is allowed for the condition of an optimal, regular and bad Wi-Fi signal?

[Flavio Miranda · Accepted solution]

 You may hear different values from others engineers but I consider SNR between 15 up to 35  and RSSI between -60 up to -75 as good condition.

 I will take a look on this version and see if there are some known but with similar behavior. .

[Electronic20]

Thank you very much, I await your comment

[Flavio Miranda]

Sure. If there are any  logs you may see to share, would be great.

[Electronic20]

I have this capture, regards

[ammahend]

what is your DCA run interval ? 

[Electronic20]

from one hour

[ammahend]

can you share some more client details

sh wireless stats client detail | e : 0

show wireless stats client delete reasons | ex _:_0

show wireless stats trace-on-failure | ex : 0

[Electronic20]

The problem was solved, it was a matter of the customer's switch network.
thanks for the support provided.