Configuring Load Balancing - NETGEAR WC7520 - ProSafe 20-AP Wireless Controller Reference Manual

ProSafe 20-AP Wireless Controller WC7520 Reference Manual
This screen lets you modify the QoS control of parameter per managed access point
group for upstream traffic flowing from the station to managed access point and the
downstream traffic flowing from managed access point to the client station. These
settings are applied only to managed access points supporting these settings.
Disabling WMM deactivates QoS control of station EDCA parameters on upstream traffic
flowing from the station to the access point. With WMM disabled, you can still set some
parameters on the downstream traffic flowing from the access point to the client station
(AP EDCA parameters).
2. Configure the settings as explained in
3. Click Apply to save your settings.
Table 20. QoS Settings
Field
AIFS (Arbitration
Inter-Frame Space)
CwMin (Minimum
Contention Window)
CwMax (Maximum
Contention Window)
Max Burst
TXOP Limit

Configuring Load Balancing

Load balancing allows the wireless controller to distribute access point clients equally among
access points. Load balancing is per radio. There are two criteria, the maximum number of
clients and the signal strength.
• Maximum number of clients: If more than the maximum number of clients per access
points try to associate, they are pushed to another access point.
• Signal strength: Signal strength determines speed. If many clients are close, and one
client is far, there is too much air time for the distant client. That client would have to wait
while sending and receiving. You can give a threshold for signal strength, which is
specified as a percentage, such as 50%.
Note: If you use access point groups, note that load balancing is available
only for the basic group.
Table 20, QoS
Description
Specifies a wait time (in milliseconds) for data frames. Valid values for AIFS are 1
through 255.
Upper limit (in milliseconds) of a range from which the initial random backoff wait time
is determined. Valid values for this field are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024.
The value for CwMin must be lower than the value for CwMax.
Upper limit (in milliseconds) for the doubling of the random backoff value. Valid
values for this field are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The value for
cwMax must be higher than the value for CwMin.
Specifies (in milliseconds) the maximum burst length allowed for packet bursts on the
wireless network. A packet burst is a collection of multiple frames transmitted without
header information. Valid values for maximum burst length are 0.0 through 999.9
Transmission opportunity limit.
Settings.
Chapter 7: Configuring Wireless Settings | 79