FortiAP Error Message : Action: client-disconnected-by-wtp

[Network_Fortinet]

Hi Team, 

There are certain users facing random wireless connection on the FortiAPs. 

For an example two users facing the same problem and they are connected to the same AP. 
Do you know what is causing this problem? 

Here is the following error message: 

Action: client-disconnected-by-wtp

Reason: "Disassociated due to an excessive number of frames requiring acknowledgment, which are not acknowledged because of AP transmissions and/or poor channel conditions."

Model: FAP-231F

Software: 7.2.4-build0395

[Stephen_G]

Hello,

Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.

Thanks,

[DG75]

Any news about this issue? We are facing same issue with our brand new FP441K APs (running latest version 7.4.4).

With the old ones (PU431F) the issue was not present (checked the old logs: no messages of this kind).

Thanks

Daniele

[Network_Fortinet]

I didn't manage to capture these message for quite sometime but we have upgraded the AP to v7.0.5 the latest. We have a different issue which is related to teams. 

[pdw8]

Sounds like you might have high airtime utilisation. This is caused by many different things but is primarily due to too many radios (AP and clients) trying to use the same channel. Each transmission requires an acknowledgement frame from the receiving end. If there is too much utilisation/interference, and the ack timeout is reached then the client gets disconnected.

Check the channel utilisation column in the Managed FortiAP section on the Fortigate.

[Network_Fortinet]

Thanks @pdw8 however I don't see any issues on the channel utilization when the client was facing the wireless dropout.