User's Manual

Chapter 9 SSID Screen
NWA-3500/NWA-3550 User’s Guide
152
9.3.3.1 ATC+WMM from LAN to WLAN
ATC+WMM from LAN (the wired Local Area Network) to WLAN (the Wireless Local
Area Network) allows WMM prioritization of packets that do not already have WMM
QoS priorities assigned. The NWA automatically classifies data packets using ATC
and then assigns WMM priorities based on that ATC classification.
The following table shows how priorities are assigned for packets coming from the
LAN to the WLAN.
9.3.3.2 ATC+WMM from WLAN to LAN
ATC+WMM from WLAN to LAN automatically prioritizes (assigns an ATC value to)
all packets coming from the WLAN. Packets are assigned an ATC value based on
their WMM value, not their size.
The following table shows how priorities are assigned for packets coming from the
WLAN to the LAN when using ATC+WMM.
9.3.4 Type Of Service (ToS)
Network traffic can be classified by setting the ToS (Type Of Service) values at the
data source (for example, at the NWA) so a server can decide the best method of
delivery, that is the least cost, fastest route and so on.
9.3.4.1 DiffServ
DiffServ is a class of service (CoS) model that marks packets so that they receive
specific per-hop treatment at DiffServ-compliant network devices along the route
Table 34 ATC + WMM Priority Assignment (LAN to WLAN)
PACKET SIZE
(BYTES)
ATC VALUE WMM VALUE
1 ~ 250 ATC_High WMM_VIDEO
250 ~ 1100 ATC_Mediu
m
WMM_BEST_EFFORT
1100 + ATC_Low WMM_BACKGROUND
Table 35 ATC + WMM Priority Assignment (WLAN to LAN)
WMM VALUE ATC VALUE
WMM_VOICE ATC_High
WMM_VIDEO ATC_High
WMM_BEST_EFFORT ATC_Medium
WMM_BACKGROUN
D
ATC_Low
NONE ATC_Medium