Can't connect to the network

[manotosh_mallik]

After given username and password error showing Can't connect to the network. After many times retries then it connected.(Facing in many system)

System: WINDOWS 11

WLC :Cisco Catalyst 9800-L (17.9.3) 

ISE:3.1.0.518 patch 7

Help me

[Torbjørn]

You will need to provide more information about the configuration of the devices. Could you post the configuration of your WLC and some information on ISE configuration?

[marce1000]

 - Have a checkup of the 9800-L (wireless controller) configuration with the CLI command show tech wireless and feed the output into : Wireless Config Analyzer

 - Use client debugging according to https://logadvisor.cisco.com/logadvisor/wireless/9800/9800ClientConnectivity 
    You can have client debugs (so called RadioActive Traces) analyzed with : Wireless Debug Analyzer

 - Check client behavior on the controller with : https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/217738-monitor-catalyst-9800-kpis-key-performa.html#anc5

                             - Consider upgrading to 17.9.4a (advisory release)

 M.

[Rich R]

And make sure the Windows WiFi drivers are fully up to date.  If Intel refer to https://www.intel.com/content/www/us/en/download/19351/windows-10-and-windows-11-wi-fi-drivers-for-intel-wireless-adapters.html

[Haydn Andrews]

Suggest
Update wifi drivers on windows 11

What EAP protocol are you using?

Do an RA trace on the MAC of the device and debug on ISE and upload them post client not working

[manotosh_mallik]

protocol  using EAP-MSCHAP,

System is connected now after 1 day. Same problem happen any desable(ISE) user case. After 1 hour its geeting connected.

[manotosh_mallik]

Issue not resolve yet

[Rich R]

> Issue not resolve yet
Have you followed any of the suggestions provided?
What does the radioactive trace show?