Report to FortiGate

config extension-controller extender
    edit <FEX SN>
        set authorized enable
        config controller-report
            set status [enable|disable]
            set interval 300
            set signal-threshold 10
        end
    next
end

Parameter	Description
status	Enable or disable periodic controller report.
interval	The interval at which to notify the FortiGate (once every 30 to 86,400 seconds; the default is 300).
signal-threshold	The signal strength threshold (10 — 50 dBm). The FortiExtender notifies the FortiGate once the RSSI change has exceeded the set threshold.