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Cisco Wireless LAN Controller Configuration Guide
OL-17037-01
Chapter 11 Configuring Radio Resource ManagementWireless Device Access
Configuring RRM
Step 4
To configure monitor intervals, follow these steps:
a.
In the Channel Scan Duration field, enter (in seconds) the sum of the time between scans for each
channel within a radio band. The entire scanning process takes 50 ms per channel, per radio and runs
at the Channel Scan Duration interval. The time spent listening on each channel is determined by
the non-configurable 50-ms scan time and the number of channels to be scanned. For example, in
the U.S. all 11 802.11b/g channels are scanned for 50 ms each within the default 180-second
interval. So every 16 seconds, 50 ms is spent listening on each scanned channel (180/11 = ~16
seconds). The Channel Scan Duration parameter determines the interval at which the scanning
occurs.The valid range is 60 to 3600 seconds, and the default value is 60 seconds for 802.11a
radios and 180 seconds for the 802.11b/g radios.
b.
In the Neighbor Packet Frequency field, enter (in seconds) how frequently neighbor packets
(messages) are sent, which eventually builds the neighbor list. The valid range is 60 to 3600
seconds, and the default value is 60 seconds.
Note
In controller software release 4.1.185.0 or later, if the access point radio does not receive a
neighbor packet from an existing neighbor within 60 minutes, the controller deletes that
neighbor from the neighbor list. In controller software releases prior to 4.1.185.0, the
controller waits only 20 minutes before deleting an unresponsive neighbor radio from the
neighbor list.
Step 5
Click
Apply
to commit your changes.
Step 6
Click
Save Configuration
to save your changes.
Note
Click
Set to Factory Default
if you ever want to return all of the controller’s RRM parameters
to their factory default values.
Using the CLI to Configure RRM
Using the controller CLI, follow these steps to configure RRM.
Step 1
Enter this command to disable the 802.11a or 802.11b/g network:
config
{
802.11a
|
802.11b
}
disable network
Step 2
Perform one of the following to configure transmit power control:
•
To have RRM automatically set the transmit power for all 802.11a or 802.11b/g radios at periodic
intervals, enter this command:
config
{
802.11a
|
802.11b
}
txPower global auto
•
To have RRM automatically reset the transmit power for all 802.11a or 802.11b/g radios one time,
enter this command:
config
{
802.11a
|
802.11b
}
txPower global once
