User Guide

Table Of Contents
305
Nortel WLAN Security Switch 2300 Series Configuration Guide
Wi-Fi Multimedia
WSS Software supports Wi-Fi Multimedia (WMM). WMM provides wireless Quality of Service for time-sensitive
applications such as voice and video. WMM is a pre-standard version of IEEE 802.11e, provided by the Wi-Fi Alliance
to enable vendors to provide interoperable multimedia support before ratification of the standard.
WMM maps priority information between wired and wireless packets, so that high priority traffic receives end-to-end
high priority treatment through the network.
WMM is enabled by default and does not require any configuration. You can disable the feature on individual radio
profiles.
How WMM Works in WSS Software
WSS switches support WMM by tagging QoS information in packets. WSS Software classifies QoS information in a
packet received by the switch. WSS Software then tags the packet’s QoS information before forwarding the packet.
Depending on the destination, WSS Software can set QoS information by setting a packet’s 802.1p value or by setting
the IP ToS value in the IP tunnel header, if the traffic is tunneled. WSS Software does not change the IP ToS value in the
data packets themselves.
How WMM Works in WSS Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Disabling or Reenabling WMM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Displaying WMM Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
Note. WSS Software also can support non-WMM VoIP devices. However, to provide
priority service to non-WMM VoIP traffic, you must configure an ACL to set the CoS for the
traffic. The AP maps this CoS value to a forwarding queue. (For information, see “Enabling
Prioritization for Legacy Voice over IP” on page 376.)