•
OFF
—Turns off DCA and sets all mesh 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.
Step 4
From the Interval drop-down list, choose one of the following options to specify how often the DCA algorithm is allowed
to run: 10 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 12 hours, or 24 hours. The default value is 10
minutes.
Step 5
From the AnchorTime drop-down list, choose a number to specify the time of day when the DCA algorithm is to start.
The options are numbers between 0 and 23 (inclusive) representing the hour of the day from 12:00 a.m. to 11:00 p.m.
Step 6
Select the
Avoid Foreign AP Interference
check box to cause the controller’s RRM algorithms to consider 802.11
traffic from foreign access points (those access points not included in your wireless network) when assigning channels
to lightweight access points, or deselect it to disable this feature. For example, RRM may adjust the channel assignment
to have access points avoid channels close to foreign access points. The default value is checked.
Step 7
Select the
Avoid Cisco AP Load
check box to cause the controller’s RRM algorithms to consider 802.11 traffic from
Cisco lightweight access points in your wireless network when assigning channels, or deselect it to disable this feature.
For example, RRM can assign better reuse patterns to access points that carry a heavier traffic load. The default value
is deselected.
Step 8
Select the
Avoid Non-802.11a (802.11b) Noise
check box to cause the controller’s RRM algorithms to consider noise
(non-802.11 traffic) in the channel when assigning channels to lightweight access points, or deselect it to disable this
feature. For example, RRM may have access points avoid channels with significant interference from nonaccess point
sources, such as microwave ovens. The default value is checked.
Step 9
From the DCA Channel Sensitivity drop-down list, choose one of the following options to specify how sensitive the
DCA algorithm is to environmental changes such as signal, load, noise, and interference when determining whether to
change channels:
•
Low
—The DCA algorithm is not particularly sensitive to environmental changes.
•
Medium
—The DCA algorithm is moderately sensitive to environmental changes.
•
High
—The DCA algorithm is highly sensitive to environmental changes.
The default value is
Medium
.
Table 33: DCA Sensitivity Thresholds
5-GHz DCA Sensitivity Threshold
2.4-GHz DCA Sensitivity Threshold
Option
5 dB
5 dB
High
20 dB
15 dB
Medium
35 dB
30 dB
Low
Step 10
For 802.11a/n networks only, choose one of the following Channel Width options to specify the channel bandwidth
supported for all 802.11n radios in the 5-GHz band:
•
20 MHz
—The 20-MHz channel bandwidth (default)
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Connecting the Cisco 1500 Series Mesh Access Points to the Network
Configuring Dynamic Channel Assignment
