Cisco Cisco 2106 Wireless LAN Controller
9
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.1.185.0
OL-31336-01
New and Changed Information
RRM Changes
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.
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.
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.
RF page of the controller GUI is now considered in the coverage hole algorithm. The default value
for this parameter is 3 clients.
Mesh Features and Changed Information
These mesh features have been added to controller software release 4.1.185.0.
Planning for Radar in a Mesh Network
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
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
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.
Locating Radar Prior to Installing a Mesh Network
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.
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.
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.
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.
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.
radar. For best results, let each channel remain active for an hour.