
Configuring WLAN Services
Configuring the QoS Policy
SCALANCE WLC711
6-36 C79000-G8976-C260-03, 07/2012, User Guide, V8.11
Step 4 — If Preferred Instead of DSCP Classification, Enable Priority Override:
• Click the applicable service class and implicitly desired UP
– Updates UP in user packet
– Updates UP for WASSP frame (if field exists) sent by AP
• Select the desired DSCP
– Updates DSCP for WASSP frames sent by AP
– Does not change DSCP in user packet
Step 5 — Configure the Advanced Wireless QoS:
• Enable the Unscheduled Automatic Power Save Delivery (U-APSD) feature
• Works in conjunction with WMM and/or 802.11e, and it is automatically disabled if both
WMM and 802.11e are disabled
Step 6 — Configure Global Admission Control:
• Enable admission control. Admission control protects admitted traffic against new bandwidth
demands. Admission control is available for Voice and Video.
• If admission control is enabled, you can configure the UL and DL policies action.
• The UL and DL policies act as enforcement of a traffic management system. Depending on the
TSPEC negotiation per traffic class, Voice and Video, you can configure what actions the
Wireless AP takes when admitted traffic has violated its TSPEC.
– You can configure the UL and DL policers per VNS
– TSPEC statistics can be viewed in the Admission Control Statistics by Wireless AP
display. For more information, see Chapter 16, Working with Reports and Statistics.
Defining Priority Level and Service Class
Voice over Internet Protocol (VoIP) using 802.11 wireless local area networks are enabling the
integration of internet telephony technology on wireless networks. Various issues including
Quality-of-Service (QoS), call control, network capacity, and network architecture are factors in
VoIP over 802.11 WLANs.
Wireless voice data requires a constant transmission rate and must be delivered within a time
limit. This type of data is called isochronous data. This requirement for isochronous data is in
CS1 0/1 AF12 2/0 AF41 5/5
CS2 1/2 AF13 2/0 AF42 5/5
CS3 3/3 AF21 3/3 AF43 5/5
CS4 4/4 AF22 3/3 EF 6/6
CS5 5/5 AF23 3/3 Others 0/1
CS6 6/6 AF31 4/4
CS7 7/7 AF32 4/4
Table 6-9 DSCP Code-Points (continued)
DSCP SC/UP DSCP SC/UP DSCP SC/UP
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