Wifi problems with FortiWLC 200D & FortiAP 822i

[JeffreyM]

Hi Everyone,

We have a Wi-Fi setup with a FortiWLC 200D controller and approximately 50 FortiAP 822i access points. Currently, we’re experiencing significant issues with Wi-Fi stability. When connected to an SSID, the connection is highly unstable. On devices like Windows PCs or Android phones, the Wi-Fi signal icon frequently fluctuates between full connection and a single bar. This issue affects all available SSIDs.

Here’s what we’ve tried so far:

1. Changed the connection type between the access points and the controller from Layer 2 to Layer 3.
2. Conducted a Wi-Fi scan with a professional company. They reported that the Wi-Fi itself appeared fine and suggested the issue might lie elsewhere in the network.

I also investigated the network infrastructure, including switches and firewalls, but found no apparent problems.

The FortiWLC and APs are running on version 8.4-8. I’ve also checked the debug/diagnose section on the WLC but didn’t notice anything unusual.

Does anyone have tips or potential solutions to help resolve this problem? Any input would be greatly appreciated!

Thanks in advance!

[Jean-Philippe_P]

Hello JeffreyM, 

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, 

[Jean-Philippe_P]

Hello,

We are still looking for an answer to your question.

We will come back to you ASAP.

Thanks,

[cjackson_ncl]

Hello,

Are you running virtual or native cell? In virtual cell enviroments we have noticed significant issues with clients band-hopping between 2.4 and 5Ghz, especially those with Intel nics. If you are running virtual cell, consider changing to native cell and using ARRP for radio channel and transmit power management. I would also consider upgrading your firmware to 8.6-7.