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260 AT-TQ2403 - Management Software - User's Guide
wlan1 vi 2 7 15 94
wlan1 be 3 15 1023 0
wlan1 bk 7 15 1023 0
wlan0 vo 14 3 7 47
wlan0 vi 2 7 15 94
wlan0 be 3 15 1023 0
wlan0 bk 7 15 1023 0
Setting Minimum and Maximum Contention Windows (cwmin, cwmax)
The Minimum Contention Window (cwmin) sets the upper limit (in milliseconds) of the range from
which the initial random backoff wait time is determined. For more details, see “Random Backoff and
Minimum / Maximum Contention Windows” and the more detailed property description for this value
in that topic.)
Valid values for the "cwmin" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The value for "cwmin" must
be lower than the value for "cwmax".
The Maximum Contention Window (cwmax) sets the upper limit (in milliseconds) for the doubling of
the random backoff value. This doubling continues until either the data frame is sent or the Maximum
Contention Window size is reached. For more details, see “Random Backoff and Minimum / Maximum
Contention Windows” and the more detailed property description for this value in that topic.)
Valid values for the "cwmax" are 1, 3, 7, 15, 31, 63, 127, 255, 511, or 1024. The value for "cwmax" must
be higher than the value for "cwmin".
Set cwmin and cwmax on the AP
To set the Minimum and Maximum Contention Windows (cwmin, cwmax) on AP-to-station traffic:
set tx-queue wlan0 with queue Queue_Name to cwmin cwmin_Value cwmax cwmax_Value
Where Queue_Name is the queue on the AP to which you want the setting to apply and cwmin_Value
and cwmax_Value are the values (in milliseconds) you want to specify for contention back-off windows.
For example, this command sets the AP Video queue (data1) cwmin value to 15 and cwmax value to 31.
AT-TQ2403# set tx-queue wlan0 with queue data1 cwmin 15 cwmax 31
View the results of this configuration update (bold in the command output highlights the modified
values):
AT-TQ2403# get tx-queue
name queue aifs cwmin cwmax burst
---------------------------------------------------------------------
wlan1 data0 1 3 7 1.5
wlan1 data1 1 7 15 3.0
wlan1 data2 3 15 63 0
wlan1 data3 7 15 1023 0
wlan0 data0 13 3 7 1.5
wlan0 data1 1 15 31 3.0
wlan0 data2 3 15 63 0
wlan0 data3 7 15 1023 0
Set cwmin and cwmax on the Station
To set the Minimum and Maximum Contention Windows (cwmin, cwmax) on station-to-AP traffic:
set wme-queue wlan0 with queue Queue_Name to cwmin cwmin_Value cwmax