H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – QoS
H3C S7500E Series Ethernet Switches Table of Contents
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Table of Contents
Chapter 1 QoS Overview .............................................................................................................. 1-1
1.1 Introduction ........................................................................................................................ 1-1
1.2 Traditional Packet Forwarding Service.............................................................................. 1-1
1.3 New Requirements Brought forth by New Services .......................................................... 1-1
1.4 Occurrence and Influence of Congestion and the Countermeasures ............................... 1-2
1.4.1 Occurrence of Congestion ...................................................................................... 1-2
1.4.2 Influence of Congestion .......................................................................................... 1-3
1.4.3 Countermeasures.................................................................................................... 1-3
1.5 Major Traffic Management Techniques ............................................................................. 1-3
Chapter 2 Traffic Classification, TP, and LR Configuration...................................................... 2-1
2.1 Traffic Classification Overview........................................................................................... 2-1
2.1.1 Traffic Classification ................................................................................................ 2-1
2.1.2 Priority ..................................................................................................................... 2-2
2.2 TP and LR Overview.......................................................................................................... 2-5
2.3 Traffic Evaluation and the Token Bucket........................................................................... 2-5
2.3.1 Token bucket........................................................................................................... 2-5
2.3.2 Evaluating the traffic with the token bucket............................................................. 2-5
2.3.3 Complicated evaluation........................................................................................... 2-6
2.3.4 TP............................................................................................................................ 2-6
2.3.5 LR............................................................................................................................ 2-7
2.4 LR Configuration................................................................................................................ 2-7
2.4.1 LR Configuration Procedure.................................................................................... 2-7
2.4.2 LR Configuration Examples .................................................................................... 2-8
2.5 Displaying and Maintaining LR .......................................................................................... 2-8
Chapter 3 QoS Policy Configuration ........................................................................................... 3-1
3.1 Overview ............................................................................................................................ 3-1
3.2 Configuring a QoS Policy................................................................................................... 3-1
3.2.1 Configuration Prerequisites..................................................................................... 3-2
3.2.2 Defining a Class ...................................................................................................... 3-2
3.2.3 Defining a Traffic Behavior...................................................................................... 3-4
3.2.4 Defining a Policy...................................................................................................... 3-6
3.2.5 Applying a Policy..................................................................................................... 3-7
3.3 Displaying and Maintaining QoS Policies ........................................................................ 3-12
Chapter 4 Congestion Management............................................................................................ 4-1
4.1 Overview ............................................................................................................................ 4-1
4.2 Congestion Management Policy........................................................................................ 4-1
4.3 Configuring an SP Queue.................................................................................................. 4-3