Client Load Balancing

Enabling load balancing can improve WLAN performance by helping to spread the client load between nearby access points, so that one AP does not get overloaded while another sits idle. The load balancing feature can be controlled from within the Unleashed web interface to balance the number of clients per radio on adjacent APs. "Adjacent APs" are determined at startup by measuring the RSSI during channel scans. After startup, Unleashed uses subsequent scans to update the list of adjacent radios periodically and when a new AP sends its first scan report. When an AP leaves, Unleashed immediately updates the list of adjacent radios and refreshes the client limits at each affected AP.

Once Unleashed is aware of which APs are adjacent to each other, it begins managing the client load by sending desired client limits to the APs. These limits are "soft values" that can be exceeded in several scenarios, including: (1) when a client's signal is so weak that it may not be able to support a link with another AP, and (2) when a client's signal is so strong that it really belongs on this AP.

The APs maintain these desired client limits and enforce them once they reach the limits by withholding probe responses and authentication responses on any radio that has reached its limit.

Key points on load balancing: