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 |
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| ATC VALUE |
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| WMM VALUE |
(BYTES) |
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1 ~ 250 |
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| ATC_High |
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| WMM_VIDEO |
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250 ~ 1100 |
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| ATC_Mediu |
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| WMM_BEST_EFFORT |
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| m |
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1100 + |
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| ATC_Low |
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| WMM_BACKGROUND |
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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 |
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WMM_VOICEATC_High
WMM_VIDEOATC_High
WMM_BEST_EFFORTATC_Medium
WMM_BACKGROUNATC_Low
D
NONEATC_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
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