User guide

Defining priority level and service class for WM-AD traffic
Summit WM Series WLAN Switch and Altitude Access Point Software Version 4.1 User Guide
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In order to provide better network traffic flow, the Summit WM series switch, access points, and WLAN
switch software provides advanced Quality of Service (QoS) management. These management
techniques include:
● WMM (Wi-Fi Multimedia) – Enabled globally on the Altitude AP, the standard provides
multimedia enhancements that improve the user experience for audio, video, and voice applications.
WMM is part of the 802.11e standard for QoS.
● IP ToS (Type of Service) or DSCP (Diffserv Codepoint) – The ToS/DSCP field in the IP header of a
frame is used to indicate the priority and Quality of Service for each frame. The IP TOS and/or
DSCP is maintained within CTP (CAPWAP Tunneling Protocol) by copying the user IP QoS
information to the CTP header—this is referred to as Adaptive QoS.
Defining the service class for the WM-AD
Service class is determined by the combination of the following operations:
● The class of treatment given to a packet. For example, queuing or per hop behavior (PHB).
● The packet marking of the output packets (user traffic and/or transport).
The service class is equivalent to the 802.1D UP (user priority) with the exception that its scale is linear:
Table 12: Service classes
Service class name (number) Priority level
Network Control (7) 7 (highest priority)
Premium (Voice) (6) 6
Platinum (video) (5) 5
Gold (4) 4
Silver (3) 3
Bronze (2) 2
Best Effort (1) 1
Background (0) 0 (lowest priority)
Table 13: Relationship between service class and 802.1D UP.
SC name SC Value 802.1d UP AC Queue
Network Control 7 7 VO VO or TVO
Premium (voice) 6 6 VO VO or TVO
Platinum (video) 5 5 VI VI
Gold 4 4 VI VI
Silver 3 3 BE BE
Bronze 2 0 BE BE
Best Effort 1 2 BK BK
Background 0 1 BK BK