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Working with VSCs
Quality of service (QoS)
Note Although the WMM specification refers to 802.1D and not 802.1p, this guide uses the term
802.1p because it is more widely recognized. (The updated IEEE 802.1D: ISO/IEC 15802-3
(MAC Bridges) standard covers all parts of the Traffic Class Expediting and Dynamic
Multicast Filtering described in the IEEE 802.1p standard.)
QoS example
In this QoS example a single service controller provides voice and data wireless support with
different quality of service settings for guests and employees.
VSC #2
SSID=Phone
QoS=Very High Priority
VSC #1
SSID=Guest
QoS=Low priority
VSC #3
SSID=Employee
QoS=Normal priority
VSC #4
SSID=Video
QoS=High priority
Backbone Network
Service Controller
AP
#1 #2 #1 #2
AP AP
#3
#4
#3
#4
VSCs are defined with the following SSIDs and QoS settings:
Phone: Supports wireless phones using very high priority.
Video: Supports high-priority video traffic for video conferences.
Employee: Used by employees. Features a higher QoS setting than the guest profile.
Guest: Used by guests. Guest get the lowest traffic priority, to reserve bandwidth for
employees.
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