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

The following table shows how priorities are assigned for packets coming from the
LAN to the WLAN.
Table 27 ATC + WMM Priority Assignment (LAN to WLAN)
PACKET SIZE
(BYTES)
1 ~ 250
250 ~ 1100
1100 +

8.3.3.2 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 28 ATC + WMM Priority Assignment (WLAN to LAN)
WMM VALUE
WMM_VOICE
WMM_VIDEO
WMM_BEST_EFFORT
WMM_BACKGROUN
D
NONE

8.3.4 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.

8.3.4.1 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
based on the application types and traffic flow. Packets are marked with DiffServ
Code Points (DSCPs) indicating the level of service desired. This allows the
intermediary DiffServ-compliant network devices to handle the packets differently
depending on the code points without the need to negotiate paths or remember
state information for every flow. In addition, applications do not have to request a
particular service or give advanced notice of where the traffic is going.
NWA-3160 Series User's Guide
ATC VALUE
ATC_High
ATC_Mediu
m
ATC_Low
ATC VALUE
ATC_High
ATC_High
ATC_Medium
ATC_Low
ATC_Medium
Chapter 8 Wireless Screen
WMM VALUE
WMM_VIDEO
WMM_BEST_EFFORT
WMM_BACKGROUND
129