Cisco Cisco 2106 Wireless LAN Controller
6
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 6.0.188.0
OL-31336-01
New Features
If you implement on neighboring floors, the result might be greater channel overlap (interference among
access points), but TX power would likely not be affected. Non-neighboring floors would be fine.
Implementing mixed controllers releases in a random deployment would likely result in significant
issues with TX power assignments but would have a minor impact on channel assignments.
access points), but TX power would likely not be affected. Non-neighboring floors would be fine.
Implementing mixed controllers releases in a random deployment would likely result in significant
issues with TX power assignments but would have a minor impact on channel assignments.
Aggressive Load Balancing Enhancement
The enhancement to Aggressive Load Balancing allows you to configure load balancing per WLAN. In
previous releases, load balancing was configured globally. Use this CLI command to configure load
balancing for a specific WLAN:
previous releases, load balancing was configured globally. Use this CLI command to configure load
balancing for a specific WLAN:
config wlan load-balance allow wlan
Band Direction
The 2.4-GHz band is often congested. Clients on this band typically experience interference from
Bluetooth devices, microwave ovens, and cordless phones as well as co-channel interference from other
access points because of the 802.11b/g limit of three non-overlapping channels. You can use this feature
to combat these sources of interference and improve overall network performance. Band direction
enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less
congested 5-GHz access point.
Bluetooth devices, microwave ovens, and cordless phones as well as co-channel interference from other
access points because of the 802.11b/g limit of three non-overlapping channels. You can use this feature
to combat these sources of interference and improve overall network performance. Band direction
enables client radios that are capable of dual-band (2.4- and 5-GHz) operation to move to a less
congested 5-GHz access point.
Band selection works by regulating probe responses to clients. It makes 5-GHz channels more attractive
to clients by delaying probe responses to clients on 2.4-GHz channels.
to clients by delaying probe responses to clients on 2.4-GHz channels.
Using the controller CLI config band-select and config wlan band-select commands, you can globally
enable band selection on the controller, or you can enable or disable band selection for a particular
WLAN. This is useful if you want to disable band selection for a select group of clients (such as
time-sensitive voice clients).
enable band selection on the controller, or you can enable or disable band selection for a particular
WLAN. This is useful if you want to disable band selection for a select group of clients (such as
time-sensitive voice clients).
Transaction Power Level Assignment
The TPC algorithm balances RF power in many diverse RF environments. Automatic power control may
not be able to resolve some scenarios in which an adequate RF design was not possible to implement due
to architectural restrictions or site restrictions—for example, when all access points must be mounted in
a central hallway, placing the access points close together, but requiring coverage out to the edge of the
building.
not be able to resolve some scenarios in which an adequate RF design was not possible to implement due
to architectural restrictions or site restrictions—for example, when all access points must be mounted in
a central hallway, placing the access points close together, but requiring coverage out to the edge of the
building.
In these scenarios, you can configure maximum and minimum transmit power limits to override TPC
recommendations. The maximum and minimum TPC power settings only apply to access points that are
attached to a controller from which they are configured; it is not a global RRM command. The default
settings disable this feature, and you should use care when overriding TPC recommendations.
recommendations. The maximum and minimum TPC power settings only apply to access points that are
attached to a controller from which they are configured; it is not a global RRM command. The default
settings disable this feature, and you should use care when overriding TPC recommendations.
The range for these parameters is -126 to 126 dBM. The minimum value cannot be greater than the
maximum value; the maximum value cannot be less than the minimum value.
maximum value; the maximum value cannot be less than the minimum value.