Quality Of Service; Wmm Qos - ZyXEL Communications 802.11 a/g User Manual

• If your NWA (in bridge mode) is connected to a wired LAN while communicating
with another wireless bridge that is also connected to the same wired LAN.
Figure 87 Bridge Loop: Bridge Connected to Wired LAN
To prevent bridge loops, ensure that you enable STP in the Wireless screen or
your NWA is not set to bridge mode while connected to both wired and wireless
segments of the same LAN.

8.5.5 Quality of Service

This section discusses the Quality of Service (QoS) features available on the NWA.

8.5.6 WMM QoS

WMM (Wi-Fi MultiMedia) QoS (Quality of Service) ensures quality of service in
wireless networks. It controls WLAN transmission priority on packets to be
transmitted over the wireless network.
WMM QoS prioritizes wireless traffic according to delivery requirements. WMM QoS
is a part of the IEEE 802.11e QoS enhancement to certified Wi-Fi wireless
networks.
On APs without WMM QoS, all traffic streams are given the same access priority to
the wireless network. If the introduction of another traffic stream creates a data
transmission demand that exceeds the current network capacity, then the new
traffic stream reduces the throughput of the other traffic streams.
The NWA uses WMM QoS to prioritize traffic streams according to the IEEE 802.1q
tag or DSCP information in each packet's header. The NWA automatically
determines the priority to use for an individual traffic stream. This prevents
NWA-3500/NWA-3550 User's Guide
Bridge
Ethernet
Chapter 8 Wireless Configuration
Bridge
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