User's Manual

hwc_vnsconfiguration.fm
Virtual Network configuration
Working with Quality of Service (QoS)
A31003-W1050-U100-2-7619,
March 2008
HiPath Wireless Controller, Access Points and Convergence Software V5 R1 , C20/C2400 User Guide 221
Each VNS has a configurable policy for the QoS characteristics of the VNS. For
every user associated with the VNS there will be a different behavior on the
wireless traffic.
Note: Active QoS is only applied on the wireless/802.11 domain, not on the wired
domain.
6.14.1 QoS modes
You can enable the following Qos modes for a VNS:
• Legacy – If enabled, the AP will classify and prioritize the downlink traffic for
all clients according to the same rules used for the WMM and 802.11e.
•WMM – If enabled, the AP will accept WMM client associations, and will
classify and prioritize the downlink traffic for all WMM clients. WMM clients will
also classify and prioritize the uplink traffic.
• 802.11e – If enabled, the AP will accept WMM client associations, and will
classify and prioritize the downlink traffic for all 802.11e clients. The 802.11e
clients will also classify and prioritize the uplink traffic.
• Turbo Voice – If any of the above QoS modes are enabled, the Turbo Voice
mode is available. If enabled, all the downlink traffic that is classified to the
Voice (VO) AC and belongs to that VNS is transmitted by the AP via a queue
called Turbo Voice (TVO) instead of the normal Voice (VO) queue. The TVO
queue is tailored in terms of contention parameters and number of retries to
maximize voice quality and voice capacity.
Note: The HiPath Wireless 802.11n supports only the WMM mode.
All combinations of the three modes are valid. The following table summarizes all
possible combinations:
Configuration
Legacy mode x x x x
WMM mode x x x x
802.11e mode x x x x
Traffic that is
classified and
prioritized
To legacy client x x x x
From legacy client
To WMM client xxx xxx
From WMM client x x x x
To 802.11e client x x x x x x
From 802.11e client x x x x