L1 represents the load on AP1 L2 represents the load on AP2. The following table illustrates various load balancing scenarios between two APs (AP1 and AP2) and the expected result when a client tries to join the network. NPlus1 Support: The load balance feature allows the clients to connect to the best available access point during roaming in an nplus1 set up. The following table provides the recommended RSSI threshold for various modes and channel bandwidth: The default value is -65dbm and the configurable range is -75dbm to -45dbm. Load balance is activated for a value below the configured RSSI value. Specify the RSSI value of the best and an alternate AP. RSSI Threshold- Configurable via CLI ( load‐balance‐vcell rssi‐threshold ). Example, if the optimum capacity of an AP is 80 clients, and the threshold is set to 90%, then a maximum of 72 clients are allowed to connect. This value denotes the number (in percentage) of clients that can connect to an AP. Load Threshold: Specify the load threshold. Load Balancing vCell: Select On to activate this functionality. Go to Configuration > Wireless > Load Balance. To enable load balancing, configure the Load Threshold for the access point. When a new client joins the network, the controller will connect the client to an AP that is running below its maximum load threshold and providing the best RSSI value. RSSI value of the Client – The RSSI value of the client is received by the controller. 
Current load of an AP – Current load represents the number of clients assigned to an AP.The load balancing is performed by the controller based on two factors Current Load of the AP and RSSI value of the client. You can configure load balancing to effectively distribute wireless clients to alternate access points.
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