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Junos Class of Service (JCOS)

Course Description Schedule Course Outline

Detailed Course Outline

Chapter 1: Course Introduction

Chapter 2: CoS Overview

  • CoS History and Evolution
  • CoS and DiffServe
  • CoS Fields in Packet Headers
  • CoS Processing

Chapter 3: Packet Classification

  • Classification Overview
  • Forwarding Classes and Packet Loss Priority
  • Fixed Classification
  • Multifield Classification
  • Behavior Aggregate Classification
  • Lab 1: Configuring Packet Classification

Chapter 4: Policing

  • Policing Overview
  • Single-Rate Two-Color Policer
  • Tricolor Marking Policers
  • Hierarchical Policers
  • Application—Directly on an Interface
  • Application—Within a Firewall Filter
  • Lab 2: Configuring Policers

Chapter 5: Scheduling

  • Scheduling Overview
  • Transmission Rate
  • Queue Priority
  • Delay Buffers
  • Drop Profiles and Drop Profile Maps
  • Scheduling Configuration
  • Lab 3: Configuring Schedulers

Day 2

Chapter 6: Hierarchical Scheduling

  • Hierarchical Scheduling Overview
  • Scheduler Modes
  • Hierarchical Scheduling Levels
  • Throughput Example
  • Remaining Traffic
  • Queue Properties in a Hierarchical Scheduling Context
  • Putting It All Together
  • Lab 4: Configuring Hierarchical Schedulers

Chapter 7: Rewrite Rules

  • Packet Header Rewrite Overview
  • Rewrite Rules and Tables
  • Rewrite Combinations
  • Lab 5: Configuring Rewrite Rules

Chapter 8: CoS-Based Forwarding

  • CBF Overview
  • CBF Configuration
  • Lab 6: Configuring CBF

Chapter 9: Case Study

  • VOIP Case Study Overview
  • VOIP Case Study: Ingress Node
  • VOIP Case Study: Transit and Egress Nodes

Appendix A: CoS Processing on M Series, T Series, and MX Series Devices

  • M Series and T Series Architecture
  • M Series and T Series CoS Packet Handling
  • IQ2 PIC CoS Packet Handling
  • MX Series (DPC and MPC/MIC) Architecture and CoS Packet Handling
 

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