Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Configuration Manual

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List of Figures
Part 1 QoS on the E Series Router
Chapter 1 Quality of Service Overview 3
Figure 1: Traffic Flow Through an E Series Router ...........................................4
Part 2 Classifying, Queuing, and Dropping Traffic
Chapter 4 Configuring Dropping Behavior with RED and WRED 25
Figure 2: Packets Dropped as Queue Length Increases ..................................27
Figure 3: Color-Blind RED Drop Profile with Colorless Queue Profile .............30
Figure 4: Color-Blind RED Drop Profile with Color-Sensitive Queue
Profile .....................................................................................................30
Figure 5: Different Treatment of Colored Packets ..........................................33
Figure 6: Defining Different Drop Behavior for Each Queue ..........................34
Figure 7: WRED and Dynamic Queue Thresholding ......................................36
Part 3 Scheduling and Shaping Traffic
Chapter 6 QoS Scheduler Hierarchy Overview 45
Figure 8: QoS Scheduler Hierarchy ................................................................46
Chapter 7 Configuring Rates and Weights in the Scheduler Hierarchy 51
Figure 9: Port Shaping on an Ethernet Module ..............................................52
Figure 10: Hierarchical Assured Rate .............................................................55
Chapter 8 Configuring Strict-Priority Scheduling 59
Figure 11: Sample Strict-Priority Scheduling Hierarchy ..................................60
Figure 12: True Strict-Priority Configuration ..................................................62
Figure 13: Relative Strict-Priority Configuration .............................................63
Figure 14: Tuning Latency on Strict-Priority Queues ......................................66
Figure 15: Sample Strict-Priority Scheduling Hierarchy ..................................67
Figure 16: Sample Relative Strict-Priority Scheduler Hierarchy ......................69
Chapter 9 Shared Shaping Overview 71
Figure 17: Implicit Constituent Selection for Compound Shared Shaper: Mixed
Interface Types .......................................................................................76
Chapter 10 Configuring Simple Shared Shaping of Traffic 79
Figure 18: Simple Shared Shaping over ATM .................................................80
Figure 19: Simple Shared Shaping over Ethernet ...........................................81
Figure 20: VP Shared Shaping .......................................................................85
Figure 21: Hierarchical Simple Shared Shaping over Ethernet .......................86
Chapter 11 Configuring Variables in the Simple Shared Shaping Algorithm 89
Figure 22: Simple Shared Shaper Behavior Without Algorithm Controls ........89
List of Figures
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