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Module 4: Implement the DiffServ QoS Model

4.1 Introducing Classification and Marking
4.1.1 Classification
4.1.2 Marking
4.1.3 Classification and Marking at the Link Layer
4.1.4 DiffServ Model
4.1.5 IP Precedence and DSCP Compatibility
4.1.6 Per-Hop Behaviors
4.1.7 Standard PHB Groups
4.1.8 Mapping CoS to Network Layer QoS
4.1.9 QoS Service Class Defined
4.1.10 Implementing QoS Policy Using a QoS Service Class
4.1.11 Trust Boundaries
4.2 Using NBAR for Classification
4.2.1 Network-Based Application Recognition
4.2.2 NBAR Application Support
4.2.3 Packet Description Language Module
4.2.4 Protocol Discovery
4.2.5 Configuring and Monitoring NBAR Protocol Discovery
4.2.6 Configuring NBAR for Static Protocols
4.2.7 Configuring Stateful NBAR for Dynamic Protocols
4.3 Introducing Queuing Implementations
4.3.1 Congestion and Queuing
4.3.2 Congestion Management - Queuing Algorithms
4.3.3 FIFO
4.3.4 Priority Queuing
4.3.5 Round Robin
4.3.6 Router Queuing Components
4.4 Configuring WFQ
4.4.1 Weighted Fair Queuing
4.4.2 WFQ Architecture and Benefits
4.4.3 WFQ Classification
4.4.4 WFQ Insertion and Drop Policy
4.4.5 Benefits and Drawbacks of WFQ
4.4.6 Configuring WFQ
4.4.7 Monitoring WFQ
4.5 Configuring CBWFQ and LLQ
4.5.1 Combining Queuing Methods
4.5.2 Class-Based Weighted Fair Queuing
4.5.3 CBWFQ Architecture, Classification and Scheduling
4.5.4 Configuring and Monitoring CBWFQ
4.5.5 Low Latency Queuing
4.5.6 LLQ Architecture and Benefits
4.5.7 Configuring and Monitoring LLQ
4.6 Congestion Avoidance
4.6.1 Managing Interface Congestion with Tail Drop
4.6.2 Tail Drop Limitations
4.6.3 Using Random Early Detection
4.6.4 Weighted Random Early Detection
4.6.5 WRED Drop Profiles
4.6.6 Configuring CBWRED
4.6.7 WRED Profiles: DSCP-Based WRED (AF)
4.6.8 Monitoring CBWRED
4.7 Introducing Traffic Policing and Shaping
4.7.1 Traffic Policing and Shaping Overview
4.7.2 Why Use Traffic Conditioners?
4.7.3 Policing vs. Shaping
4.7.4 Measuring Traffic Rates with Tokens
4.7.5 Single Token Bucket Class-Based Policing
4.7.6 Cisco IOS Traffic Policing and Shaping Mechanisms
4.7.7 Applying Traffic Policing
4.8 Understanding WAN Link Efficiency Mechanisms
4.8.1 Link Efficiency Mechanisms
4.8.2 Compression Overview
4.8.3 Layer 2 Payload Compression
4.8.4 Header Compression
4.8.5 Large Packets “Freeze Out” Voice on Slow WAN Links
4.8.6 Link Fragmentation and Interleaving
4.8.7 Applying Link Efficiency Mechanisms
4.9 Implementing QoS Preclassify
4.9.1 Virtual Private Networks
4.9.2 Implementing QoS with Preclassification
4.9.3 QoS Preclassify Applications
4.9.4 QoS Preclassification Deployment Options
4.10 Deploying End-to-End QoS
4.10.1 QoS SLAs
4.10.2 Typical SLA Requirements for Voice
4.10.3 Deploying End-to-End QoS
4.10.4 Enterprise Campus QoS Implementations
4.10.5 WAN Edge QoS Implementations
4.10.6 WAN Edge Design
4.10.7 Control Plane Policing?
4.11 DiffServ QoS Lab Exercises
4.11.1 Lab 4.1 Default Queuing Tools
4.11.2 Lab 4.2 Intermediate Queuing Tools
4.11.3 Lab 4.3 TCP Header Compression
4.11.4 Lab 4.4 Comparing Queuing Strategies
4.11.5 Lab 4.5 Class-based Queuing and NBAR
4.11.6 Lab 4.6 Class-based Marking, Shaping, and Policing
4.11.7 Lab 4.7 WAN QoS Tools
4.11.8 Lab 4.8 Shaping and Policing
4.11.9 Lab 4.9 QoS Pre-classify
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