HP ProCurve 530 NA, Руководство по управлению и настройке

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8-7
Special Features
QoS Commands
for the “cwMin” are 1, 3, 7, 15, 31, 63, 127, 255, 511, and 1024. The value
for “cwMin” must be lower than the value for “cwMax”. (The default
per queue: 3, 7, 15, 15.)
• cwMax : Specifies the Maximum Contention Window QoS parameter.
The value specified is the upper limit (in milliseconds) of a range from
which the initial random backoff wait time is determined. Valid values
for the “cwMax” are 1, 3, 7, 15, 31, 63, 127, 255, 511, and 1024. The
value for “cwMax” must be higher than the value for “cwMin”. (The
default per queue: 7, 15, 63, 1023.)
•
Burst:
Specifies the Maximum Burst Length QoS parameter. This
value specifies the length of time allowed for a packet burst (collec-
tion of transmitted multiple frames without header information) on a
wireless network. Valid values for maximum burst length are 0
through 999.9. (The default per queue: 1.5, 3, 0, 0.)
■
Station Enhanced Distributed Channel Access (EDCA) Parame-
ters:
Affect traffic flowing from the client station to the access flow.
• Queue: Specifies which of the prioritization queues (defined for each
type of data transmitted from AP to station) to configure.
–
Data 0 (Voice): High-priority queue, minimum delay. Time-
sensitive data such as VoIP and streaming media are automati-
cally 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).
• AIFS: Arbitration Inter-Frame Spacing (AIFS) specifies a wait time
in milliseconds for data frames. Valid values are 1–255. (The default
per queue: 2, 2, 3. 7.)
• cwMin: Specifies the Minimum Contention Window QoS parameter.
The value specified is the lower limit (in milliseconds) of a range from
which the initial random backoff wait time is determined. Valid values
for the “cwMin” are 1, 3, 7, 15, 31, 63, 127, 255, 511, and 1024. The value
for “cwMin” must be lower than the value for “cwMax”. (The default
per queue: 3, 7, 15, 15.)
• cwMax : Specifies the Maximum Contention Window QoS parameter.
The value specified is the upper limit (in milliseconds) of a range from
which the initial random backoff wait time is determined. Valid values