Notifications are sent to the Prime
Infrastructure RRM dashboard when a channel change occurs. Channel changes
depend on the Dynamic Channel Assignment (DCA) configuration where the mode can
be set to auto or on demand. When the mode is auto, channel assignment is
periodically updated for all lightweight access points that permit this
operation. When the mode is set to on demand, channel assignments are updated
based on request. If the DCA is static, no dynamic channel assignments occur,
and values are set to their global defaults.
When a channel change trap is received after an earlier channel change,
the event is marked as Channel Revised; otherwise, it is marked as Channel
Changed. A channel change event can have multiple causes. The reason code is
factored and equated to 1, irrespective of the number of reasons that are
possible. For example, suppose a channel change might be caused by signal,
interference, or noise. The reason code in the notification is refactored
across the reasons. If the event had three causes, the reason code is
refactored to 1/3 or 0.33 per reason. If ten channel change events have the
same reason code, all three reasons are equally factored to determine the cause
of the channel change.
Notifications are sent to the Prime Infrastructure RRM dashboard when
transmission power changes occur. Each event for transmit power changes is
caused by multiple reasons. The reason code is factored and equated to one,
irrespective of the number of reasons for the event to occur.
When RRM is run on the controller, dynamic grouping is done and a new
group leader is chosen. Dynamic grouping has three modes: Automatic, Off, and
Leader. When grouping is Off, no dynamic grouping occurs, and each switch
optimizes only its own lightweight access point parameters. When grouping is
Automatic, switches form groups and elect leaders to perform better dynamic
parameter optimization. With automatic grouping, configured intervals (in
seconds) represent the period with which the grouping algorithm is run.
(Grouping algorithms also run when the group contents change and automatic
grouping is enabled.)