Junos Class of Service (JCOS)

Junos Class of Service (JCOS) Training
Junos Class of Service (JCOS)
  • Junos Class of Service (JCOS)

    2 Days Course
    Service Provider
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    Course Details

    Overview

    This two-day course provides students with advanced class-of-service (CoS) knowledge and configuration examples. The course begins with an overview of CoS before going into classification, policing, scheduling, and rewriting. The course then covers class-based forwarding and finishes with a case study. This course is based on the Junos operating system Release 12.3R3.4. Through demonstrations and hands-on labs, students will gain experience in configuring and verifying Junos CoS features.

     

    Course Level:

    Junos Class of Service is an advanced level course.

    Objectives

    After successfully completing this course, you should be able to:

    • Understand the history and evolution of CoS.
    • Identify the CoS fields in various packet headers.
    • List the CoS processing stages on devices running the Junos OS.
    • Identify the default CoS settings on devices running the Junos OS.
    • Configure and verify behavior aggregate (BA) and multifield (MF) classification.
    • Configure and verify two-color and tricolor marking policers.
    • Configure and verify schedulers and their components.
    • Configure and verify the multiple levels of hierarchical schedulers.
    • Configure and verify packet header rewriting.
    • Configure and verify class-based forwarding.
    • Create a CoS configuration based on a set of design requirements.

    Outline

    Day 1

    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

    Target Audience

    • This course benefits individuals responsible for configuring and monitoring devices running the Junos OS, especially those in a service provider environment. It also benefits individuals responsible for designing networks containing devices running the Junos OS.

    Pre-Requisites

    Course Schedule

      Feb 19 - Feb 20, 2018
    London
      May 22 - May 23, 2018
    London
      Aug 16 - Aug 17, 2018
    London
      Nov 14 - Nov 15, 2018
    London