QOS v2.5 - Implementing Cisco Quality of Service

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Description

Implementing Cisco Quality of Service (QOS) v2.5 provides learners with in-depth knowledge of QoS requirements, conceptual models such as best effort, IntServ, and DiffServ, and the implementation of QoS on Cisco platforms. The curriculum covers the theory of QoS, design issues, and configuration of various QoS mechanisms to facilitate the creation of effective administrative policies providing QoS.

Case studies and lab exercises included in the course help learners to apply the concepts from the individual modules to real-life scenarios. The course also gives learners design and usage rule for advanced QoS features. This gives the learners the opportunity to design and implement efficient, optimal, and trouble-free multiservice networks.

To participate in the hands-on labs in this class, you need to bring a laptop computer with the following:

  • Windows 7 or 8.1 or 10 is recommended. Mac OSX 10.6 or greater is supported as well.
  • Intel Celeron or better processors are preferred.
  • 1 GB or more of RAM
  • Browser Requirements: Internet Explorer 10 or greater or Mozilla Firefox. (Safari and Mozilla Firefox for Mac OSX)
  • All students are required to have administrator rights to their PCs and cannot be logged in to a domain using any Group Policies that will limit their machine's capabilities.
  • If you do not have administrator rights to your PC, you at least need permissions to download, install, and run Cisco Any Connect Client.
  • If you are participating in a WebEx event, it is highly recommended to take this class at a location that has bandwidth speeds at a minimum of 1 Mbps bandwidth speeds.

Note:Students registering for this course will be receiving their course kit in a digital format. To be able to view your digital kit you will need to bring a laptop PC and/or a compatible iPad or Android tablet. The recommended system requirements and instructions to access the course kit content can be found at the following link:Digital Course Kit Requirements and Instructions

Please be aware that this digital version is designed for online use, not for printing. You can print up to 10 pages only in each guide within a course. Please note that every time you click the Print button in the book, this counts as one page printed, whether or not you click OK in the Print dialog.

 

Objectives

Upon completing this course, the learner will be able to meet these overall objectives:

  • You will be able to identify, describe, and correctly implement the appropriate QoS mechanisms required to create an effective administrative policy providing QoS

Prerequisites

The knowledge and skills that a learner must have before attending this course are as follows:

  • Interconnecting Cisco Networking Devices, Part 1 and 2 (ICND1 and ICND2)
  • Cisco Certified Networking Associate

Who Should Attend

The primary audience for this course is as follows:

  • Pre- and post-sales technical engineers responsible for designing, implementing, or troubleshooting networks
  • Network architects responsible for designing multiservice networks to carry voice, video, and data traffic in enterprise or service provider environments
  • Advanced Unified Communications Specialization
  • Master UC Specialization
  • Master Telepresence ATP

The secondary audience for this course is as follows:

  • CCIE R&S Candidates

Outline

Module 1: Introduction to QoS

    Lesson 1: Review Converged Networks
    • Converged Networks
    • Quality Issues in Converged Networks
    • Available Bandwidth
    • Components of Network Delay
    • Calculating End-to-End Delay
    • Jitter
    • Packet Loss
    • Summary


    Lesson 2: Understand QoS

    • QoS Defined
    • QoS Policy Defined
    • Implement a QoS Policy
    • Identify Network Traffic
    • Voice Traffic Profile
    • Videoconferencing Traffic Profile
    • Cisco TelePresence Traffic Profile
    • Data Traffic Profile
    • Divide Network Traffic into Classes
    • Define Policies for Traffic Classes
    • QoS Mechanisms
    • QoS Implementation Methods
    • QoS Monitoring Methods
    • Cisco Medianet QoS Design
    • Summary


    Case Study 1-1: QoS Mechanisms

      Task 1: Apply QoS Mechanisms


    Lesson 3: Describe Best-Effort and Integrated Services Models

    • QoS Models
    • Best-Effort QoS Model
    • IntServ Model
    • Resource Reservation Protocol
    • RSVP Components
    • RSVP Interface Bandwidth Queuing
    • Summary


    Lesson 4: Describe the Differentiated Services Model

    • DiffServ Model
    • DiffServ Terminology
    • DSCP Encoding
    • Per-Hop Behaviors
    • Expedited Forwarding
    • Assured Forwarding
    • AF Drop Probability
    • Class Selector
    • Integration of IntServ and DiffServ
    • Summary


    Lesson 5: Module Summary

    • References


    Lesson 6: Module Self-Check

Module 2: Implement and Monitor QoS

    Lesson 1: MQC Introduction
    • Modular QoS CLI
    • MQC Components
    • Example: MQC Policy Configuration
    • Class Maps Overview
    • Match Operation in Class Maps
    • Policy Maps Overview
    • Service Policy Overview
    • Hierarchical Policy
    • Summary


    Lesson 2: Monitor QoS

    • SNMP Management of QoS
    • Describe Class-Based QoS MIB
    • Cisco NBAR
    • Cisco NBAR Protocol Discovery
    • Cisco NBAR Protocol Discovery MIB
    • NetFlow
    • Cisco Flexible NetFlow
    • Cisco Flexible NetFlow Integration with NBAR
    • Class-Based Flexible NetFlow
    • Cisco Performance Monitor
    • Cisco Mediatrace
    • Cisco IP SLA
    • IP SLA: UDP Jitter
    • Summary


    Lab 2-1: IP SLA Setup and QoS Baseline Measurement

      Task 1: Verify Network Connectivity
      Task 2: Create a Baseline Measurement of Network Traffic
      Task 3: Measure the Network Performance Under Traffic Load
      Task 4: QoS Measurement Lab Results


    Lesson 3: Define Campus AutoQoS

    • AutoQoS
    • AutoQoS Macros
    • Trust Boundaries
    • Campus AutoQoS Trust
    • Campus AutoQoS Conditional Trust
    • Campus AutoQoS Video
    • Campus AutoQoS VoIP
    • Campus AutoQoS Classify
    • Monitoring AutoQoS in the Campus
    • Summary


    Lesson 4: Define WAN AutoQoS

    • Cisco AutoQoS for Routers
    • WAN AutoQoS VoIP
    • AutoQoS for the Enterprise Overview
    • Configuring AutoQoS for the Enterprise
    • Monitoring AutoQoS in the WAN
    • Summary


    Lab 2-2: Configuring QoS with Cisco AutoQoS

      Task 1: Configure Cisco AutoQoS Classify on the Catalyst 2960-S Switch
      Task 2: Configure Cisco AutoQoS for the Enterprise on Cisco IOS Routers
      Task 3: Measure Network Performance with Cisco AutoQoS for the Enterprise
      Task 4: QoS Measurement Results


    Lesson 5: Module Summary

    • References


    Lesson 6: Module Self-Check

Module 3: Classification and Marking

    Lesson 1: Classification and Marking Overview
    • Classification
    • Marking
    • Classification and Marking at the Data Link Layer
    • Classification and Marking at the Network Layer
    • Mapping QoS Marking Between OSI Layers
    • QoS Service Class Defined
    • Service Class Templates
    • RFC 4594 Marking Recommendations
    • Summary


    Case Study 3-1: Classification and Marking

      Task 1: Classification and Marking
      Task 2: Identify Network Locations Where Classification and Marking Should Be Applied


    Lesson 2: MQC for Classification and Marking

    • MQC Classification Options
    • Configuring Class Maps
    • Monitoring Classification
    • MQC Marking Options
    • Configuring Class-Based Marking
    • Monitoring Class-Based Marking
    • Configuring IPV6 Classification and Marking
    • Summary


    Lab 3-2: Classification and Marking Using MQC

      Task 1: Configure an IP Extended Access List
      Task 2: Configure MQC Classification
      Task 3: Configure Class-Based Marking


    Lesson 3: NBAR for Classification

    • Cisco NBAR
    • NBAR Application Support
    • Configuring NBAR With MQC
    • Classifying HTTP Traffic
    • NBAR2 Application Grouping
    • NBAR Port Map
    • NBAR Custom Protocols
    • Configuring Custom Protocols
    • NBAR Worm Policing
    • NBAR versus Future Worms
    • Summary


    Lab 3-3: Using NBAR for Classification

      Task 1: Upgrade the NBAR Protocol Pack
      Task 2: Discover Applications and Traffic by Using NBAR
      Task 3: Configure Classification with NBAR


    Lesson 4: Use of QoS Preclassify

    • Issues with QoS on VPNs
    • ToS Byte Preservation
    • QoS Preclassify Operation
    • Configuring QoS Preclassify
    • Monitoring QoS Preclassify
    • Summary


    Lab 3-4: Configuring QoS Preclassify

      Task 1: Configure a GRE Tunnel
      Task 2: Configure QoS Preclassify


    Lesson 5: Campus Classification and Marking

    • Campus Classification and Marking
    • Overview of QoS Trust Boundaries
    • Campus Ingress QoS Models
    • QoS Map Tables: Marking
    • Internal DSCP
    • Applying Campus Switch Classification and Marking
    • Monitoring Campus Classification and Marking
    • Summary


    Lab 3-5: Campus Classification and Marking Using MQC

      Task 1: Configure a Trust Boundary
      Task 2: Configure CoS-to-DSCP Mapping
      Task 3: Configure Class-Based Marking
      Task 4: Verify QoS Markings
      Task 5: Adjust Router Classification and Marking Policy


    Lesson 6: Module Summary

    • References


    Lesson 7: Module Self-Check

Module 4: Congestion Management

    Lesson 1: Queuing Introduction
    • Congestion and Queuing
    • Queuing Components
    • Hardware Queue Size
    • Congestion on Logical Interfaces
    • Queuing Algorithms
    • FIFO Queuing
    • Priority Queuing
    • Round-Robin Queuing
    • WRR Queuing
    • DRR Queuing
    • Summary


    Lesson 2: Configure WFQ

    • Weighted Fair Queuing
    • WFQ Classification
    • WFQ Scheduling
    • WFQ Drop Operation
    • Benefits and Drawbacks of WFQ
    • Configuring WFQ
    • Monitoring WFQ
    • Summary


    Lab 4-1: Configuring Fair Queuing

      Task 1: Configure Fair Queuing
      Task 2: Measure Network Performance with Fair Queuing
      Task 3: Adjust the Fair Queuing Configuration
      Task 4: Measure Network Performance with Fair Queuing Configured with 256 Dynamic Queues
      Task 5: QoS Measurement Lab Results


    Lesson 3: Configure CBWFQ and LLQ

    • Class-Based Weighted Fair Queuing
    • CBWFQ Architecture
    • Benefits and Drawbacks of CBWFQ
    • Configuring CBWFQ
    • Low Latency Queuing
    • LLQ Architecture
    • Configuring LLQ
    • Monitoring LLQ-CBWFQ
    • Summary


    Lab 4-2: Configuring LLQ-CBWFQ

      Task 1: Configure a CBWFQ Policy with LLQ
      Task 2: Apply and Monitor CBWFQ with LLQ Operation
      Task 3: Measure Network Performance with CBWFQ
      Task 4: QoS Measurement Lab Results


    Lesson 4: Configure Campus Congestion Management

    • Campus Queuing
    • Catalyst Switch Hardware Queue Nomenclature
    • Queue Mapping
    • WRR on Campus Switches
    • WRR Bandwidth and Buffer Settings
    • SRR on Campus Switches
    • SRR Common and Reserved Buffers
    • Configuring Ingress Queuing on Cisco Catalyst 3750 Series Switches
    • Configuring Egress Queuing on Cisco Catalyst 3750 Series Switches
    • Monitoring Congestion Management On Cisco Catalyst 3750 Series Switches
    • Summary


    Lab 4-3: Configuring Campus-Based Queuing Mechanisms

      Task 1: Review Egress Queuing Defaults
      Task 2: Configure Global Egress Queuing Parameters
      Task 3: Configure and Monitor Egress Queuing


    Lesson 5: Module Summary

    • References


    Lesson 6: Module Self-Check

Module 5: Congestion Avoidance

    Lesson 1: Congestion Avoidance Introduction
    • TCP Behavior
    • Congestion and TCP
    • Example: TCP Congestion Control Algorithms
    • Managing Congestion with Tail Drop
    • Impact of Tail Drop
    • Random Early Detection
    • RED Profiles and Modes
    • TCP Behavior Before and After RED
    • Summary


    Lesson 2: Configure Class-Based WRED

    • Weighted Random Early Detection
    • Class-Based WRED
    • WRED Building Blocks
    • WRED Profiles
    • IP Precedence-Based WRED
    • DSCP-Based WRED
    • Configure CBWRED
    • Changing WRED Sensitivity to Bursts
    • Example: DSCP-Based WRED
    • Monitoring CBWRED
    • Summary


    Case Study 5-1: WRED Traffic Profiles

      Task 1: Create WRED Traffic Profiles


    Lesson 3: Configure ECN

    • Explicit Congestion Notification
    • ECN Field
    • ECN and WRED
    • ECN Operation
    • Configuring ECN
    • Monitoring ECN
    • Summary


    Lab 5-2: Configuring DSCP-Based WRED

      Task 1: Configure DSCP-Based WRED
      Task 2: Monitor DSCP-Based WRED
      Task 3: Configure DSCP-Based CBWRED with ECN
      Task 4: Monitor DSCP-Based WRED with ECN


    Lesson 4: Describe Campus-Based Congestion Avoidance

    • Congestion Avoidance in the Campus
    • Weighted Tail Drop
    • Configuring WTD Thresholds on the Cisco Catalyst 3750 Series Switch
    • WRED on Campus Switches
    • Dynamic Buffer Limiting
    • Summary


    Lab 5-3: Configuring WTD Thresholds

      Task 1: Configure and Monitor Weighted Tail Drop


    Lesson 5: Module Summary

    • References


    Lesson 6: Module Self-Check

Module 6: Traffic Policing and Shaping

    Lesson 1: Traffic Policing and Shaping Overview
    • Traffic Policing and Traffic Shaping
    • Policing and Shaping Use Cases
    • Policing vs. Shaping
    • Single Token Bucket Model
    • Single Token Bucket Class-Based Policing
    • Dual Token Bucket Class-Based Policing
    • Dual-Rate Token Bucket Class-Based Policing
    • Class-Based Traffic Shaping
    • Summary


    Lesson 2: Configure Class-Based Policing

    • Class-Based Policing
    • Configuring Class-Based Policing
    • Example: Single-Rate Single Token Policer
    • Example: Single-Rate Dual Token Policer
    • Example: Dual-Rate Policer
    • Monitoring Class-Based Policing
    • Summary


    Lesson 3: Campus Policing

    • Campus Policing Overview
    • QoS Map Tables: Policing
    • Applying Campus Switch Policing
    • Campus Aggregate Policing
    • Campus Microflow Policing
    • Summary


    Lab 6-1: Configuring Class-Based Policing

      Task 1: Configure Single Token Bucket Class-Based Policing
      Task 2: Monitor Single Token Bucket Class-Based Policing
      Task 3: Configure Dual Token Bucket Class-Based Policing
      Task 4: Monitor Dual Token Bucket Class-Based Policing


    Lesson 4: Configure Class-Based Shaping

    • Class-Based Shaping
    • Shaping Methods
    • Configuring Class-Based Shaping
    • Example: Shaping Configuration
    • Example: Hierarchical Shaping
    • Monitoring Class-Based Shaping
    • Summary


    Lab 6-2: Configuring Class-Based Shaping

      Task 1: Migrate Traffic to the MPLS Service
      Task 2: Configure Class-Based Shaping
      Task 3: Configure Hierarchical Shaping


    Lesson 5: Configure Class-Based Shaping on Frame Relay Interfaces

    • Frame Relay Refresher
    • Frame Relay Congestion Control
    • Frame Relay Congestion Adaptation
    • FECN-to-BECN Propagation
    • Configuring Adaptive Class-Based Shaping
    • Monitoring FRTS
    • Summary


    Lesson 6: Configure Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation

    • Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation
    • Benefits of Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation
    • Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation Operation
    • Configuring Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation
    • Monitoring Frame Relay Voice-Adaptive Traffic Shaping and Fragmentation
    • Summary


    Lesson 7: Module Summary

      References


    Lesson 8: Module Self-Check

Module 7: Link Efficiency Mechanisms

    Lesson 1: Link Efficiency Mechanisms Overview
    • Link Efficiency Mechanisms
    • Layer 2 Payload Compression
    • Header Compression
    • Large Packet "Freeze Out"
    • Serialization Delay
    • Link Fragmentation and Interleaving
    • Fragment Size Recommendations for Voice
    • Summary


    Lesson 2: Configure Class-Based Header Compression

    • Header Compression
    • Class-Based TCP Header Compression
    • Example: Class-Based TCP Header Compression Configuration
    • Class-Based RTP Header Compression
    • Example: Class-Based RTP Header Compression
    • Configuring Class-Based Header Compression
    • Monitoring Class-Based Header Compression
    • Summary


    Lab 7-1: Configuring Class-Based Header Compression

      Task 1: Configure Class-Based Header Compression
      Task 2: Monitor Class-Based Header Compression


    Lesson 3: Configure LFI

    • LFI Options
    • Configuring MLP with Interleaving
    • Monitoring MLP Interleaving
    • FRF.12 Frame Relay Fragmentation
    • Configuring FRF.12 Frame Relay Fragmentation
    • Monitoring FRF.12 Frame Relay Fragmentation
    • Summary


    Lab 7-2: Configuring LFI

      Task 1: Configure LFI
      Task 2: Monitor LFI


    Lesson 4: Module Summary

    • References


    Lesson 5: Module Self-Check

Module 8: Deploying End-to-End QoS

    Lesson 1: Apply Best Practices for QoS Policy Design
    • Optimally Deploying QoS Within the Enterprise
    • Strategically Defining QoS Objectives
    • Cisco Modified RFC 4594 Marking Recommendations and Class Expansion
    • Understanding Application Service-Level Requirements
    • QoS Requirements for Control Plane Traffic
    • Control Plane Policing
    • Data Plane Policing
    • Classification and Marking Best Practices
    • Policing and Markdown Best Practices
    • Queuing and Dropping Best Practices
    • Link Efficiency Mechanisms Best Practices
    • Summary


    Lesson 2: End-to-End QoS Deployments

    • Deploying End-to-End QoS
    • Enterprise Campus QoS Guidelines
    • Campus QoS Deployment Steps and Options
    • Branch Router QoS Guidelines
    • WAN Edge QoS Design Considerations
    • Enterprise Network with Layer 2 Service
    • Enterprise Network with Layer 3 Service
    • QoS Service Level Agreements
    • QoS Implications of Layer 3 Service Offerings
    • Enterprise-to-Service Provider QoS Class Mapping
    • Re-Marking DSCP at SP MPLS Edge
    • Summary


    Lab 8-1: Mapping Enterprise QoS Policy to the Service Provider Policy

      Task 1: Adjust QoS Markings to Match the Service Provider QoS Policy
      Task 2: Re-mark Inbound Traffic from the Service Provider


    Lesson 3: Module Summary

    • References


    Lesson 4: Module Self-Check