Configuring Load Balancing - NETGEAR ProSafe WC7520 Reference Manual

ProSafe 20-AP Wireless Controller WC7520 Reference Manual
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%.
If you use access point groups, note that load balancing is available
Note:
only for the basic group.
The controller supports balancing of load on the access points it manages. This is based on
the number of clients connected to access points as well as signal quality of clients. At the
time a client discovers access points (using probe requests) or sends association frames, the
access point decides whether to accept a client or not based on the number of clients already
connected or the signal strength of the clients.
Number of clients: Setting the maximum number of clients to a low value (compared to
•
the total number of clients in an office or floor) is recommended when there are several
access points and the administrator would like a good distribution of clients between the
access points.
RSSI: Setting the received signal strength indication (RSSI) to a high percentage means
•
that only clients near access points are permitted to associate to the access points. This
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.
Chapter 7: Configuring Wireless Settings | 77