Atc+Wmm From Lan To Wlan; Atc+Wmm From Wlan To Lan; Type Of Service (Tos); Diffserv - ZyXEL Communications NWA-3160 - V3.70 Manual

Chapter 9 SSID Screen

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.
Table 34 ATC + WMM Priority Assignment (LAN to WLAN)
PACKET SIZE
(BYTES)
1 ~ 250
250 ~ 1100
1100 +

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.
Table 35 ATC + WMM Priority Assignment (WLAN to LAN)
WMM VALUE
WMM_VOICE
WMM_VIDEO
WMM_BEST_EFFORT
WMM_BACKGROUN
D
NONE

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
156
ATC VALUE
ATC_High
ATC_Mediu
m
ATC_Low
ATC VALUE
ATC_High
ATC_High
ATC_Medium
ATC_Low
ATC_Medium
WMM VALUE
WMM_VIDEO
WMM_BEST_EFFORT
WMM_BACKGROUND
NWA-3160 Series User's Guide