Wireless/Redundant Edge Services xl Module Management and Configuration Guide WS.02.xx and greater

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Radio Port Configuration
Quality of Service (QoS) on RP Radios
Quality of Service (QoS) on RP Radios
All traffic on a radio shares the same medium. So an RP radio may queue traffic
for multiple WLANs together. By default, RPs queue traffic according to the
classification of the WLAN to which it belongs. Because, by default, this
classification is normal for all WLANs, all traffic receives the same handling.
That is, each frame must contend for the medium on equal footing.
One way to configure RPs to prioritize transmitted traffic is to assign different
classifications to traffic in different WLANs. See “Manually Classifying a
WLAN’s Traffic” on page 4-109 of Chapter 4: Wireless Local Area Networks
(WLANs).
For more precise prioritization, you can enable Wi-Fi Multimedia (WMM) on
a WLAN.
WMM
WMM, which is Wi-Fi’s implementation of a portion of the IEEE 802.11e-2005
ratified specification for wireless QoS enhancements, includes packet priori-
tization, scheduled access, and call admission control. WMM divides traffic
into four access categories (ACs): voice, video, best effort, and background
and allows RPs to queue outbound wireless traffic according to each AC.
The RP creates one queue for each AC on each of its radios, using an 802.1p
value (by default) or Differentiated Service Code Point (DSCP) to assign a
particular frame to a queue. The RP radio then transmits traffic in the queue
according to the RP WMM parameters for that AC.
Table 3-4 shows the WMM queues on the ProCurve RPs 210, 220, and 230. Each
radio on an RP has four queues for outbound wireless traffic. These queues
and all radio WMM settings apply to traffic from the RP to wireless stations.
Table 3-4. WMM Priority Queues
Queue Number AC
1 Background
2 Best effort
3Video
4 Voice