Users Guide

Dell PowerConnect ArubaOS 5.0 | User Guide Adaptive Radio Management (ARM) | 149
4. In the Profiles Details window, select the name of the traffic management profile for which you want to
configure traffic shaping.
(If you do not have any traffic management profiles configured, enter a name for a new profile in the Profile
Details pane, then click Add. Select the new profile from the profiles list.)
5. In the Profile Details pane, click the Station Shaping Policy drop-down list and select either default-access,
fair-access or preferred-access.
6. Click Apply to save your changes.
Enabling Traffic Shaping via the WebUI
To enable and configure traffic shaping via the command-line interface, access the CLI in config mode and issue
the following commands:
wlan traffic-management-profile <profile> shaping-policy fair-access|preferred-
access
To disable traffic shaping, use the default-access parameter:
wlan traffic-management-profile <profile> shaping-policy default-access
Use the following commands to apply an 802.11a or 802.11g traffic management profile to an AP group or an
individual AP.
ap-group <name> dot11a-traffic-mgmt-profile|dot11g-traffic-mgmt-profile <profile>
ap-name <name> dot11a-traffic-mgmt-profile|dot11g-traffic-mgmt-profile <profile>
Spectrum Load Balancing
The spectrum load balancing feature helps optimize network resources by balancing clients across channels,
regardless of whether the AP or the controller is responding to the wireless clients' probe requests. The controller
uses the ARM neighbor update messages that pass between APs and the controller to determine the distribution
of clients connected to each AP's immediate (one-hop) neighbors. This feature also takes into account the
number of APs visible to the clients in the RF neighborhood and can factor the client’s perspective on the
network into its coverage calculations.
The controller compares whether or not an AP has more clients than its neighboring APs on other channels. If an
AP’s client load is at or over a predetermined threshold as compared to its immediate neighbors, or if a
neighboring Dell AP on another channel does not have any clients, load balancing will be enabled on that AP.
When an AP has the spectrum load balancing feature enabled, the AP will send an association response with error
code 17 to new clients trying to associate. If the client receiving the error code tries to associate to the AP a
second time, it will be admitted. If a client is rejected by two APs in a row, it will be admitted by any AP on its
third try. Note that the load balancing feature only affects the association of new clients; this feature does not
reject or attempt to balance clients that are already associated to the AP.
Spectrum load balancing is disabled by default, and can be enabled for 2.4G traffic through an 802.11g profile or
for 5G traffic through an 802.11a RF management profile. The spectrum load balancing feature also requires that
the 802.11a or 802.11g RF management profiles reference an ARM profile with ARM scanning enabled.
For details on modifying 802.11a or 802.11g RF management profiles, refer to “RF Management (802.11a and
802.11g) Profiles” on page 204.
RX Sensitivity Tuning Based Channel Reuse
In some dense deployments, it is possible for APs to hear other APs on the same channel. This creates co-channel
interference and reduces the overall utilization of the channel in a given area. Channel reuse enables dynamic
control over the receive (Rx) sensitivity in order to improve spatial reuse of the channel.