Alcatel-Lucent 7950 Quality Of Service Manual page 11

List of Figures
QoS Policies
Figure 1: Traffic Queuing Model for 3 Queues and 3 Classes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Figure 2: Egress Forwarding CLass Override . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Figure 3: RED Slope Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
Figure 4: Virtual Scheduler Internal Bandwidth Allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Figure 5: Hierarchical Scheduler and Queue Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Figure 6: Scheduler Policy on SAP and Scheduler Hierarchy Creation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Figure 7: Scheduler Policy on Customer Site and Scheduler Hierarchy Creation . . . . . . . . . . . . . . . . . . . . . .62
Network QoS Policies
Network Queue QoS Policies
Service Egress and Ingress QoS Policies
Figure 8: DE Bit in the 802.1ad S-TAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
Figure 9: DE Aware 802.1ad Access Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .136
Figure 10: DE Aware PBB Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Figure 11: DEI Processing Ingress into the PE1 SAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
Figure 12: Egress SAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Figure 13: Ingress Criteria Classification Directly to Policer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
Queue Sharing and Redirection
Figure 14: Ingress QoS Control on VPRN Bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
QoS Scheduler Policies
Figure 15: Port Level Virtual Scheduler Bandwidth Allocation Based on Priority and CIR . . . . . . . . . . . . . .445
Figure 16: Two Scheduler Policy Model for Access Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .446
Figure 17: Schedulers on SAP or Multi-Service Site Receive Bandwidth From Port Priority Levels . . . . . . .447
Figure 18: Direct Service or Association to Port Scheduler Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .449
Figure 19: Port Bandwidth Distribution for Service and Port Scheduler Hierarchies . . . . . . . . . . . . . . . . . . .451
Figure 20: Port Bandwidth Distribution for Direct Queue to Port Scheduler Hierarchy . . . . . . . . . . . . . . . . .451
Figure 21: Bandwidth Distribution on Network Port with Port-Based Scheduling . . . . . . . . . . . . . . . . . . . . .453
Figure 22: Limit Unused Bandwidth Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .460
Figure 23: Resulting Bandwidth Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .460
Slope QoS Policies
Advanced QoS Policies
Class Fair Hierarchical Policing (CFHP)
Figure 24: Policer Bucket Rate and Packet Flow Interaction with Bucket Depth. . . . . . . . . . . . . . . . . . . . . .573
Figure 25: Parent Policer Bucket and Priority Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .573
Figure 26: Ingress Policer Threshold Determination and Output Behavior . . . . . . . . . . . . . . . . . . . . . . . . . .588
Figure 27: Egress Policer Threshold Determination and Output Behavior . . . . . . . . . . . . . . . . . . . . . . . . . .591
7950 XRS Quality of Service Guide Page 11