3Com 4200G 12-Port Configuration Manual page 357

1 QoS Configuration·····································································································································1-1
Overview ·················································································································································1-1
Introduction to QoS··························································································································1-1
Traditional Packet Forwarding Services··························································································1-1
New Requirements from Emerging Applications·············································································1-1
Major Traffic Control Technologies ·································································································1-2
QoS Features Supported by the Switch 4200G series ···········································································1-2
Introduction to QoS Features··················································································································1-3
Traffic Classification ························································································································1-3
Priority Trust Mode ··························································································································1-4
Protocol Priority ·······························································································································1-8
Traffic Policing and Traffic Shaping·································································································1-8
Queue Scheduling ·························································································································1-10
Flow-Based Traffic Accounting······································································································1-12
Burst ··············································································································································1-12
QoS Configuration·································································································································1-13
QoS Configuration Task List ·········································································································1-13
Configuring Priority Trust Mode·····································································································1-13
Configuring Priority Mapping ·········································································································1-14
Setting the Priority of Protocol Packets ·························································································1-17
Configuring Traffic Policing ···········································································································1-18
Configuring Traffic Shaping···········································································································1-20
Configuring Queue Scheduling ·····································································································1-20
Configuring Traffic Accounting ······································································································1-22
Enabling the Burst Function ··········································································································1-24
Displaying and Maintaining QoS ···································································································1-24
QoS Configuration Examples················································································································1-25
Traffic Policing Configuration Example ·························································································1-25
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