Installation guide

Overview
1-18
802.11e QoS
802.11e enables real-time audio and video streams to be assigned a higher priority over regular data. The
switch supports the following 802.11e features:
•Basic WMM
• WMM Linked to 802.1p Priorities
• WMM Linked to DSCP Priorities
• Fully Configurable WMM
• Admission Control
• Unscheduled-APSD
• TSPEC Negotiation
• Block ACKQBSS Beacon Element
802.1p support
802.1p is a standard for providing QoS in 802-based networks. 802.1p uses three bits to allow switches to re-
order packets based on priority level. 802.1p uses the Generic Attributes Registration Protocol (GARP) and the
GARP VLAN Registration Protocol (GVRP). GARP allows MUs to request membership within a multicast
domain, and GVRP lets them register to a VLAN.
Voice QoS
When switch resources are shared between a Voice over IP (VoIP) conversation and a file transfer, bandwidth
is normally exploited by the file transfer, thus reducing the quality of the conversation or even causing it to
disconnect. With QoS, the VoIP conversation (a real-time session), receives priority, maintaining a high level
of voice quality. Voice QoS ensures:
• Strict Priority
• Spectralink Prioritization
• VOIP Prioritization (IP ToS Field)
• Multicast Prioritization
Data QoS
The switch supports the following data QoS techniques:
• Egress Prioritization by WLAN
• Egress Prioritization by ACL
DSCP to AC Mapping
The switch provides for arbitrary mapping between Differentiated Services Code Point (DSCP) values and
WMM Access Categories. This mapping can be set manually.
1.2.2.13 Wireless Layer 2 Switching
The switch supports the following layer 2 wireless switching techniques:
•WLAN to VLAN
• MU User to VLAN
•WLAN to GRE