Users Guide

Understanding Wi-Fi Multimedia
Wi-Fi Multimedia (WMM), is a Wi-Fi Alliance specification based on the IEEE 802.11e wireless Quality of Service
(QoS) standard. WMM works with 802.11a, b, g, n, and ac physical layer standards.
WMM supports four access categories (ACs): voice, video, best effort, and background.
Table 214 shows the
mapping of the WMM access categories to 802.1p priority values. The 802.1p priority value is contained in a
two-byte QoS control field in the WMM data frame.
Priority 802.1p Priority WMM Access Category
Lowest 1 Background
2
0 Best effort
3
4 Video
5
6 Voice
Highest 7
Table 214: WMM Access Category to 802.1p Priority Mapping
In non-WMM, or hybrid environments where some clients are not WMM-capable, Dell uses voice and best
effort to prioritize traffic from these clients.
Unscheduled Automatic Power Save Delivery (U-APSD) is a component of the IEEE 802.11e standard that
extends the battery life on voice over WLAN devices. When enabled, clients trigger the delivery of buffered
data from the AP by sending a data frame.
For the environments in which the wireless clients support WMM, you can enable both WMM and U-APSD in
the SSID profile.
Enabling WMM
You can use the WebUI or CLI to enable WMM for wireless clients.
In the WebUI
To enable WMM for wireless clients:
1. Navigate to the Configuration > Wireless > AP Configuration page.
2. Select either the AP Group or AP Specific tab. Click Edit for the AP group or AP name.
3. In the Profiles list, select Wireless LAN, then Virtual AP, then the applicable virtual AP profile. Select the
SSID profile.
4. In the Profile Details, select the Advanced tab.
5. Select the Wireless Multimedia (WMM) option. Or, select the Wireless Multimedia U-APSD (WMM-
UAPSD) Powersave option if you want to enable WMM in power save mode.
6. Click Apply.
Dell Networking W-Series ArubaOS 6.5.x | User Guide Voice and Video |
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