Summit WM User Guide, Software Version 5.3 205
z 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.
z Tur bo Vo i ce - 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 WM-AD
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.
All combinations of the three modes are valid. The following table summarizes all possible
combinations:
The APs are capable of supporting 5 queues. The queues are implemented per radio. For example, 5
queues per radio. The queues are:
The Summit WM Controller supports the definition of 8 levels of user priority (UP). These priority
levels are mapped at the AP to the best appropriate access class. Of the 8 levels of user priority, 6 are
considered low priority levels and 2 are considered high priority levels.
WMM clients have the same 5 AC queues. WMM clients will classify the traffic and use these queues
when they are associated with a WMM-enabled AP. WMM clients will behave like non-WMM clients -
map all traffic to the Best Effort (BE) queue - when not associated with WMM-enabled AP.
The prioritization of the traffic on the downstream (for example, from wired to wireless) and on the
upstream (for example, from wireless to wired) is dictated by the configuration of the WM-AD and the
QoS tagging within the packets, as set by the wireless devices and the host devices on the wired
network.
Both Layer 3 tagging (DSCP) and Layer 2 (802.1d) tagging are supported, and the mapping is
conformant with the WMM specification. If both L2 and L3 priority tags are available, then both are
Table 24: QoS mode combinations
Configuration
Legacy mode x x x x
WMM mode x x x x
802.11e mode xxxx
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 xxxxx
From 802.11e client xxxx
Table 25: Queues
Queue Name Purpose
AC_VO Voice
AC_VI Video
AC_BK Background
AC_BE Best Effort
AC_TVO Turbo Voice
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