| Channel Assignment Method
|
Dynamic
channel assignment has three modes:
-
Automatic—Mode that periodically updates for all access point
that permit this operation.
-
Interval—How often the DCA algorithm has been configured to run.
| Note
|
If your controller supports only OfficeExtend access points, we
recommend that you set the DCA interval to 6 hours for optimal performance. For
deployments with a combination of OfficeExtend access points and local access
points, the range of 10 minutes to 24 hours can be used.
|
-
Anchor Time—The time of day when the DCA algorithm has been
configured to start. The range is from 0 to 23 (12:00 a.m. to 11:00 p.m.)
-
Freeze—Mode that causes the controller to update channel
assignments when you click
Invoke Channel Update Now.
-
OFF—Mode that turns off DCA and sets all access point radios to
the first channel of the band, which is the default value. If you choose this
option, you must manually assign channels on all radios.
The
default is Automatic.
|
| Avoid Foreign AP Interference
|
Radio
Resource Management (RRM)Foreign 802.11 interference-monitoring parameters that
you can enable to have Radio Resource Management consider interference from
foreign (non-Cisco access point outside the RF/mobility domain) access points
when assigning channels to Cisco access points. You can disable this parameter
to have Radio Resource Management ignore this interference. The default is
unselected.
In certain
circumstances with significant interference energy (dBm) and load (utilization)
from Foreign APs, Radio Resource Management may adjust the channel assignment
to avoid these channels (and sometimes adjacent channels) in access points
close to the Foreign APs to increase capacity and reduce variability.
|
| Avoid Cisco AP Load
|
Radio
Resource Management (RRM)Bandwidth-sensing parameter that you can enable
controllers to consider the traffic bandwidth used by each access point when
assigning channels to access point. You can disable this parameter to have
Radio Resource Management ignore this value. The default is unselected.
In certain
circumstances and with denser deployments, there may not be enough channels to
properly create perfect channel reuse. In these circumstances, Radio Resource
Management can assign better reuse patterns to those access points that carry
more traffic load.
|
| Avoid non-802.11a Noise
|
Radio
Resource Management (RRM) Noise-monitoring parameter that you can enable to
have access points avoid channels that have interference from non-Access Point
sources, such as microwave ovens or Bluetooth devices. Disable this parameter
to have Radio Resource Management ignore this interference.
In circumstances with significant interference energy (dBm)
from non-802.11 noise sources, Radio Resource Management may adjust the channel
assignment to avoid these channels (and sometimes adjacent channels) in access
points close to the noise sources to increase capacity and reduce variability.
|
| Channel Assignment Leader
|
Name and
IP address of the channel assignment leader. Cisco WLAN Solution, mobility
groups Cisco WLAN Solution WPS groups. This is the MAC address of the group
leader.
|
| Last Auto Channel Assignment
|
Last time the Radio Resource
Management (RRM) evaluated the current channel assignment on a periodic basis.
This parameter does not imply that channels have changed, only that the Radio
Resource Management has made an evaluation of the current assignment.
|
| DCA Channel Sensitivity
|
Configured
DCA sensitivity setting.
This
setting determines how sensitive the DCA algorithm is to environmental changes,
such as signal, load, noise, and interference, when determining whether to
change channels.
To see why
the DCA algorithm changed channels, click
Monitor
and then
View All under Most Recent Traps. The trap provides
the MAC address of the radio that changed channels, the previous channel and
the new channel, the reason why the change occurred, the energy before and
after the change, the noise before and after the change, and the interference
before and after the change.
|