Chapter 1 What’s New for FortiOS 5.0 : Wireless : Wireless client load balancing for high-density deployments : Configuration
  
Configuration
From the web‑based manager, edit a custom AP profile and select Frequency Handoff and AP Handoff as required for each radio on the AP.
From the CLI, you configure wireless client load balancing thresholds for each custom AP profile. Enable access point hand-off and frequency hand-off separately for each radio in the custom AP profile.
config wireless-controller wtp-profile
edit new-ap-profile
set handoff-rssi <rssi_int>
set handoff-sta-thresh <clients_int>
config radio-1
set frequency-handoff {disable | enable}
set ap-handoff {disable | enable}
end
config radio-2
set frequency-handoff {disable | enable}
set ap-handoff {disable | enable}
end
end
Where:
handoff-rssi is the RSSI threshold. Clients with a 5 Ghz RSSI threshold over this value are load balanced to the 5GHz frequency band. Default is 25. Range is 20 to 30.
handoff-sta-thresh is the access point handoff threshold. If the access point has more clients than this threshold it is considered busy and clients are changed to another access point. Default is 30, range is 5 to 25.
frequency-handoff enable or disable frequency handoff load balancing for this radio. Disabled by default.
ap-handoff enable or disable access point handoff load balancing for this radio. Disabled by default.
 
Frequency handoff must be enabled on the 5GHz radio to learn client capability.