We often receive requests from customers, explaining that their connection at some points "freezes", or they have a hard time getting a good signal strength even though they are connected near to the Access Point. Another scenario might be that clients start off with a good connection, but after moving between APs, the connection is unstable before it is lost.
These symptoms, generally speaking, are what we refer to as Roaming Issues .
- It might be, that you are encountering an issue called "sticky clients". That is, when the client stays permantently connected to an Access Point, due to the client not triggering a disconnection on very low signals. One way to compromise this issue is to set RSSI Thresholds. These can be set under Configuration > Object > AP Profile, editing a radio profile in "Show Advanced Settings"-Mode and scrolling down to the bottom. You will see "Station Association Threshold", which indicates the minimum RSSI level a client must have before he can connect, as well as "Disassociate Station Threshold", which indicates the minimum signal a client can have before getting disconnected by the AP.
The values set in here are highly individual and depend on your site. We however recommend values for Station Association around -70 dBm to -75 dBm, for Disassociation Thresholds we recommend ~ -75 to -80 dBm.
Here a screenshot for your reference:
- If this does not help, you might consider checking the SSIDs Security profile. Since v4.30 firmware on our controllers, there is a new feature implemented called 802.11r (Fast Roaming). This standard will help you having an even faster and smoother roaming connection as you are used to have. However, this feature brings a few problems with it, and some clients might have some trouble. Also, some APs might have problems having this set up.
You can disable this function in the Configuration > Object > AP Profile > "SSID" - Tab > "Security Profile"-Tab > Doubleclick on the SSID Security Profile and deactivate the "802.11r" - Checkbox