Wireless
Quality of Service
Cisco Small Business WAP121 and WAP321 Wireless-N Access Point with PoE
97
5
STEP 1
Select
Wireless
>
QoS
in the navigation pane.
STEP 2
Select an option from the
EDCA Template
list:
•
WFA Defaults
—Populates the WAP device and Station EDCA parameters
with WiFi Alliance default values, which are best for general, mixed traffic.
•
Optimized for Voice
—Populates the WAP device and Station EDCA
parameters with values that are best for voice traffic.
•
Custom
—Enables you to choose custom EDCA parameters.
These four queues are defined for different types of data transmitted from WAP-
to-station. If you choose a Custom template, the parameters that define the queues
are configurable; otherwise, they are set to predefined values appropriate to your
selection. The four queues are:
•
Data 0 (Voice)—High priority queue, minimum delay. Time-sensitive data
such as VoIP and streaming media are automatically sent to this queue.
•
Data 1 (Video)—High priority queue, minimum delay. Time-sensitive video
data is automatically sent to this queue.
•
Data 2 (Best Effort)—Medium priority queue, medium throughput and delay.
Most traditional IP data is sent to this queue.
•
Data 3 (Background)—Lowest priority queue, high throughput. Bulk data that
requires maximum throughput and is not time-sensitive is sent to this queue
(FTP data, for example).
STEP 3
Configure the following EDCA and Station EDCA parameters:
NOTE
These parameters are configurable only if you selected Custom in the
previous step.
•
Arbitration Inter-Frame Space
—A wait time for data frames. The wait time
is measured in slots. Valid values for AIFS are 1 through 255.
•
Minimum Contention Window
—An input to the algorithm that determines
the initial random backoff wait time (window) for retry of a transmission.
This value is the upper limit (in milliseconds) of a range from which the initial
random backoff wait time is determined.
The first random number generated is a number between 0 and the number
specified here.
