List of Figures

Figure 1: Traffic Flow Through an E Series Router

Figure 2: Packets Dropped as Queue Length Increases

Figure 3: Color-Blind RED Drop Profile with Colorless Queue Profile

Figure 4: Color-Blind RED Drop Profile with Color-Sensitive Queue Profile

Figure 5: Different Treatment of Colored Packets

Figure 6: Defining Different Drop Behavior for Each Queue

Figure 7: WRED and Dynamic Queue Thresholding

Figure 8: QoS Scheduler Hierarchy

Figure 9: Port Shaping on an Ethernet Module

Figure 10: Hierarchical Assured Rate

Figure 11: Sample Strict-Priority Scheduling Hierarchy

Figure 12: True Strict-Priority Configuration

Figure 13: Relative Strict-Priority Configuration

Figure 14: Tuning Latency on Strict-Priority Queues

Figure 15: Sample Strict-Priority Scheduling Hierarchy

Figure 16: Sample Relative Strict-Priority Scheduler Hierarchy

Figure 17: Implicit Constituent Selection for Compound Shared Shaper: Mixed Interface Types

Figure 18: Simple Shared Shaping over ATM

Figure 19: Simple Shared Shaping over Ethernet

Figure 20: VP Shared Shaping

Figure 21: Hierarchical Simple Shared Shaping over Ethernet

Figure 22: Simple Shared Shaper Behavior Without Algorithm Controls

Figure 23: Less Conservative Simple Shared Shaper Behavior

Figure 24: More Liberal Simple Shared Shaper Behavior

Figure 25: Dynamic Rate When Video Flow Starts

Figure 26: Dynamic Rate When Video Flow Stops

Figure 27: VC Compound Shared Shaping Example

Figure 28: VP Compound Shared Shaping Example

Figure 29: Implicit Constituent Selection for Compound Shared Shaper at Best-Effort Node

Figure 30: Implicit Constituent Selection for Compound Shared Shaper at Best-Effort Queue

Figure 31: Weighted Shared Shaping

Figure 32: Implicit Constituent Selection for Compound Shared Shaper: Mixed Interface Types

Figure 33: Explicit Constituent Selection

Figure 34: Case 1: Explicit Constituent Selection with Weighted Constituents

Figure 35: Case 2: Explicit Constituent Selection with Weighted Constituents

Figure 36: Munged Profile Example

Figure 37: Attaching QoS Profiles to ATM Subinterfaces

Figure 38: Attaching QoS Profile to ATM Interface and Subinterface

Figure 39: Diffserv Configuration with Multiple Traffic-Class Groups

Figure 40: Diffserv Configuration Without Traffic-Class Groups

Figure 41: Phantom Nodes

Figure 42: Shadow Nodes

Figure 43: Integrated ATM Scheduler

Figure 44: Default Integrated Mode

Figure 45: Low-Latency Mode

Figure 46: Low-CDV Mode (per-VP CDVT)

Figure 47: Low-CDV Mode (per-VC CDVT)

Figure 48: 802.3ad Link Aggregation Scheduler Hierarchy

Figure 49: Subscriber LoadBalanced Scheduler Hierarchy for Port 0

Figure 50: Subscriber LoadBalanced Scheduler Hierarchy for Port 1

Figure 51: Subscriber Allocation and Load Balancing

Figure 52: LNS (Non-MLPPP) Scheduler Hierarchy

Figure 53: LNS (MLPPP) QoS Scheduler Hierarchy

Figure 54: LAC over Ethernet (Without VLANs) Scheduler Hierarchy

Figure 55: LAC over Ethernet (With LANs) Scheduler Hierarchy

Figure 56: LAC over ATM

Figure 57: VLAN Interface Column with Interface Sets

Figure 58: Scheduler Hierarchy with Nodes at Interface Set and Superset

Figure 59: Relationship of Parameter Definitions, Scheduler Profiles, and QoS Profiles

Figure 60: Physical Network Topology

Figure 61: QoS Scheduler Hierarchy

Figure 62: Hierarchical Parameters Scheduler Hierarchy

Figure 63: Scheduler Hierarchy with QoS Adjustment for IP Multicast

Figure 64: Byte Adjustment for VC1 and VC2

Figure 65: Byte Adjustment Calculation for Ethernet and ATM Encapsulations