ZyXEL Communications NXC2500 User Manual page 134

Chapter 9 Policy and Static Routes
WMM
Wi-Fi Multimedia (WMM) provides basic Quality of Service (QoS) features to wireless networks. The
four categories of QoS described by WMM are: voice (VO), video (VI), best effort (BE), and
background (BK). These categories, known as a "access categories" (AC), are mapped to 802.1D
priority values which can then be mapped to their corresponding DSCP hex values.
Table 64 WMM to DiffServ Conversion on the NXC
Priority
Lowest
Highest
The WMM ACs as implemented on the NXC have the following functions:
VOICE: All wireless traffic to the SSID is tagged as voice data. This is recommended if an SSID is
used for activities like placing and receiving VoIP phone calls.
VIDEO: All wireless traffic to the SSID is tagged as video data. This is recommended for activities
like video conferencing.
BEST EFFORT: All wireless traffic to the SSID is tagged as "best effort," meaning the data travels
the best route it can without displacing higher priority traffic. This is good for activities that do not
require the best bandwidth throughput, such as surfing the Internet.
BACKGROUND: All wireless traffic to the SSID is tagged as low priority or "background traffic",
meaning all other access categories take precedence over this one. If traffic from an SSID does not
have strict throughput requirements, then this access category is recommended. For example, an
SSID that only has network printers connected to it.
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WMM AC 802.1D Priority
BK 1
BK 2
BE 0
BE 3
VI 4
VI 5
VO 6
VO 7
DSCP Hex Value
0x08
0x10
0x00
0x18
0x20
0x28
0x30
0x38
NXC2500 User's Guide