3Com Router 3000 Ethernet FamilyConfiguration Guide Table of Contents3Com CorporationiTable of ContentsChapter 1 QoS Overview .............................................................................................................. 1-11.1 Introduction ........................................................................................................................ 1-11.2 Traditional Packets Transmission Application ................................................................... 1-11.3 New Requirements Caused by New Applications ............................................................. 1-11.4 Congestion: Causes, Impact, and Countermeasures........................................................ 1-21.4.1 Causes .................................................................................................................... 1-21.4.2 Countermeasure...................................................................................................... 1-31.5 Traffic Control Technologies.............................................................................................. 1-3Chapter 2 Traffic Classification, Policing, and Shaping............................................................ 2-12.1 Traffic Classification........................................................................................................... 2-12.2 Traffic Policing and Traffic Shaping ................................................................................... 2-12.2.1 Traffic Evaluation and Token Bucket ...................................................................... 2-22.2.2 Traffic Policing......................................................................................................... 2-32.2.3 Traffic Shaping ........................................................................................................ 2-32.2.4 Line Rate on Physical Port...................................................................................... 2-42.3 Traffic Policing and Traffic Shaping Configuration ............................................................ 2-52.3.1 Configuring Traffic Policing ..................................................................................... 2-52.3.2 Configuring Traffic Shaping..................................................................................... 2-72.3.3 Configuring Interface LR ......................................................................................... 2-72.4 Traffic Policing and Shaping Display and Debug .............................................................. 2-82.4.1 Displaying CAR Rule............................................................................................... 2-82.4.2 Displaying CAR Information on Each Interface....................................................... 2-82.4.3 Displaying GTS Configuration and Statistics on Interface ...................................... 2-82.4.4 Displaying LR Configuration and Statistics on Interface ......................................... 2-92.5 Traffic Policing and Shaping Configuration Example ........................................................ 2-92.6 MFR Interface LR Configuration Example....................................................................... 2-11Chapter 3 Congestion Management ............................................................................................ 3-13.1 Brief Introduction to Congestion Management .................................................................. 3-13.1.1 Congestion Management Policies........................................................................... 3-13.1.2 Comparisons among Congestion Management Technologies ............................... 3-63.2 Configuring FIFO Queue ................................................................................................... 3-93.2.1 Configuring FIFO Queue Length............................................................................. 3-93.3 Priority Queuing Configuration........................................................................................... 3-93.3.1 Configuring Priority-list ............................................................................................ 3-93.3.2 Applying Priority-list Queue on the Interface......................................................... 3-113.3.3 Displaying and Debugging Priority Queue ............................................................ 3-123.4 Custom Queuing Configuration ....................................................................................... 3-12
