ZyXEL NWA-3163 User Guide - Page 156
Type Of Service ToS
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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) ATC VALUE WMM VALUE 1 ~ 250 ATC_High WMM_VIDEO 250 ~ 1100 ATC_Mediu m WMM_BEST_EFFORT 1100 + ATC_Low WMM_BACKGROUND 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 ATC VALUE WMM_VOICE ATC_High WMM_VIDEO ATC_High WMM_BEST_EFFORT ATC_Medium WMM_BACKGROUN D ATC_Low NONE ATC_Medium 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 NWA-3160 Series User's Guide