Users Guide

5. In the Profile Details pane, select Band Steering to enable this feature, or uncheck the Band Steering
checkbox to disable this feature.
6. Once band steering is enabled, click the steering mode drop-down list and select the desired steering
mode.
7. Click Apply.
In the CLI
Use the following commands to enable band steering via the command-line interface.
(host)(config) #wlan virtual-ap <profile> band-steering
(host)(config) #wlan virtual-ap <profile> steering-mode
Dynamic Bandwidth Switch
ARM’s dynamic bandwidth switch feature provides capability for ARM to detect the 20MHz interferer by
reading the Clear Channel Assessment (CCA) statistics and other radio statistics. Once the signatures are
detected, ARM moves to another 80MHz channel or downgrade to 40MHz. This feature only works when
dynamic-bw parameter is enabled and ARM is set to use 80MHz assignment.
Traditionally, when the bandwidth is configured, the operating channel bandwidth is fixed and is not changed.
If ARM decides to downgrade the bandwidth to 40MHz, then it will upgrade back to 80MHz after the clear time based
on the volume of the traffic.
Enabling Dynamic Bandwidth Switch
Use the following procedures to enable or disable dynamic bandwidth switch using command-line interfaces.
In the CLI
Use the following commands to enable and set dynamic bandwidth switch:
(host) (config) #rf arm-profile default
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw-beacon-failed-thresh
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw-cca-ibss-thresh
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw-cca-intf-thresh
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw-clear-time
(host) (Adaptive Radio Management (ARM) profile "default") #dynamic-bw-wait-time
Enabling Traffic Shaping
In a mixed-client network, it is possible for slower clients to bring down the performance of the whole network.
To solve this problem and ensure fair access to all clients independent of their WLAN or IP stack capabilities, an
AP can implement the traffic shaping feature. This feature has the following three options:
l default-access: Traffic shaping is disabled, and client performance is dependent on MAC contention
resolution. This is the default traffic shaping setting.
l fair-access: Each client gets the same airtime, regardless of client capability and capacity. This option is
useful in environments like a training facility or exam hall, where a mix of 802.11a/g, 802.11g and 802.11n
clients need equal to network resources, regardless of their capabilities.
l preferred-access: High-throughput (802.11n) clients do not get penalized because of slower 802.11a/g or
802.11b transmissions that take more air time due to lower rates. Similarly, faster 802.11a/g clients get
more access than 802.11b clients.
Dell Networking W-Series ArubaOS 6.5.x | User Guide Adaptive Radio Management | 467