Configure a detailed load balancing rule, including the maximum
traffic allowed on an AP, the difference between the current traffic
and the traffic on the AP with the lightest load, and the number of
attempts to the AP with full load.
By default, when the traffic load on an AP reaches 500 Kbit/s and
the difference between the current traffic and the traffic on the AP
with the lightest load reaches 500 Kbit/s, clients can associate only
to another AP in the group. After a client association is denied by an
AP for 10 times, the client will be allowed to associate to the AP
upon the next attempt.