Cisco Cisco 2106 Wireless LAN Controller

These changes in RRM functionality have been added to controller software release 4.1.185.0.

The default value for the transmit power control threshold has been changed from –65 dBm to –70 
dBm.

The default setting for aggressive load-balancing has been changed to disabled, and the default value 
for the clients parameter in the config load-balancing window clients CLI command has been 
changed to 5.

The Client Min Exception Level parameter on the 802.11a (or 802.11b/g) Global Parameters > Auto 
RF page of the controller GUI is now considered in the coverage hole algorithm. The default value 
for this parameter is 3 clients.

These mesh features have been added to controller software release 4.1.185.0.

Before deploying an outdoor wireless network using 1510 access points, it is important to conduct a 
radio site survey to determine the presence of radar and make appropriate adjustments to your mesh 
network design. Refer to the 

 section below for 

more details.

Additionally, your outdoor mesh network should be designed to detect and appropriately adjust to the 
presence of radar once the network is deployed. This latter condition is to account for radar that was not 
in use during the initial Cisco mesh network installation such as new fixed installations or mobile radar 
(ships and military radar). Refer to the 

 below for 

more details.

There are a number of methods that you can use to detect radar within an area prior to installing an 
outdoor mesh network; however, it is important to note that radar’s strength and its ability to be detected 
can be altered by structures such as buildings or windows. 

Therefore, it is important to take the measurements from a location that has the least obstructions across 
the target area. Additionally, indoor measurements to detect radar are not a replacement for outdoor 
measurements.

To detect radar in an area prior to installation of a mesh network, you can:

Research the public record for known radar installations. A local regulatory body is also a source.

The 5600-to-5650-MHz band is allocated for weather radar operation, so channels 120 to 128 (IEEE 
802.11-defined channels) should always be monitored to identify potential radar activity.

Use a mesh access point to detect radar.

For new deployments, the recommended approach is to use the mesh access point that will actually 
be installed in the area to detect radar. This approach provides the best indication of how the target 
device will locate radar.

Once installed outdoors, each channel of the mesh access point should be tested for the presence of 
radar. For best results, let each channel remain active for an hour.