Hi @Bapan Mondal
Unfortunately the problem you described is the daily basis problem any wireless admin face.
Stick client is client problem.
Due some stupid decision from the adapter vendor , the algorism they use does not recognize the message send by the Access Points . They ignore every information sent on the beacons and use only and information RSSI. RSSI is not the best parameter because the RSSI may be high but the noisy can be also high which result in poor SNR, which is what really matters. All that matter for a client adapter is save battery and scan the wifi spectrum searching for better signal cost too much battery and they prefer stick where they are until they drop off.
Occasional Wi-Fi connection drops when switching between APs
This can be a coverage problem but can also fall the the client stick problem. They try to stick with the first AP as much as they can until the drop off. They prefer lose the connection than roam. After they lose connection then they roam.
Some devices switch between 5GHz and 2.4GHz frequencies unexpectedly
If you can, disable 2.4Ghz. I take it as good practice although I know not always is possible. For Wireless Lan controller you may benefit from the feature Band Select which allows you to "deny" the client in 2.4ghz up to a certain threshold.
It don't switch between AP even if stand beneath the AP
That's another client stick problem and can also be related to coverage.
Laptop’s Wi-Fi Flaps and showing very low signal as compared to mobile devices.
Here I would recommend a site survey first and check the Laptop driver. Keep it always updated and prefer Intel if possible.
Objective: Establish flawless connectivity for all users and enable dashboard access on mobile devices.
Everyone's dream. But, I've been saying, wifi is not used because it is better, it is used because it is cheaper.
