Client random disconnection from WAP

[Adnan Razi Khan]

WAP model 9120AX

WLC 9800CL

Clients are disconnecting randomly from WAP and SSID is dot1x not PSK based this is happening on particular office building other office building works fine. Is there any command in Cisco WLC to find out reason of disconnection?

WLC version is 17.9.5

[MHM Cisco World]

In wlc 

Montering > client

Check in which state client with issue stop

Normal working client must show Run state

MHM

[Adnan Razi Khan]

There is no command / debug to find out on wlc or ap level to find out cause of disconnection?

[MHM Cisco World]

After it disconnected it re connected or not?

İf not as I mentioned above check in which state client stop

MHM

[PSM]

Hi @Adnan Razi Khan yes, you can enable radioactive trace for few clients and keep it running. 

In GUI Troubleshooting>RadioactiveTrace> Add add the mac address and start the trace. Wait until issue (client gets disconnected). After that you can stop the trace. Generate the trace file and you can read the debug.

[Mark Elsen]

  - @Adnan Razi Khan    You can use commands from https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/217738-monitor-catalyst-9800-kpis-key-performa.html#toc-hId-866973845
                                     to get an overview of client behavior and or watch for problem indicators

                                     You can also debug individual clients with instructions from https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity
                                     these client debugs (called RadioActive Traces) can be analyzed with Wireless Debug Analyzer

                                    ==> Always validate the configuration of your WLC 9800CL controller using the CLI command
                                     show tech wireless and feed the output from that into Wireless Config Analyzer

  M.

[Saikat Nandy]

You need to start from RA trace - no other option. Along with that, you can run 'show wireless stats client delete reasons' which will give you the delete reasons with numbers. This is just a stat to get a holistic view of overall client delete reason and where most of the deletion is happening. 

[Haydn Andrews]

As others have said the RA Trace is a good one, then use the Cisco Wireless Debug Analyzer to convert it to more readable format.

If its a Windows device you could also try the following with admin rights (i believe)

from command line

netsh show wlan report

more details on it here

https://support.microsoft.com/en-au/windows/analyze-the-wireless-network-report-76da0daa-1db2-6049-d154-7bb679eb03ed#:~:text=At%20the%20command%20prompt%2C%20type,by%20Wi%2DFi%20connection%20sessions.