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Junos Class of Service (JCOS)

 
Junos Class of Service (JCOS) 
Junos Class of Service (JCOS)

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. Through demonstrations and hands-on labs, students will gain experience in configuring and verifying Junos CoS features. This course is based on the Junos operating system Release 16.2R1.6.



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Course Level

Junos Class of Service (JCOS) is an advanced level course.

Intended 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.

Prerequisites

Students should attend the Introduction to the Junos Operating System (IJOS) course and the Junos Intermediate Routing (JIR) course, or have equivalent experience prior to attending this class. General knowledge of CoS concepts is also helpful.

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

Course Contents

Day 1

Chapter 1: Course Introduction

Chapter 2: CoS Overview

  • CoS History and Evolution
  • CoS and DiffServ
  • 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
  • Lab 7: Case Study

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

Schedule
  Below is a list of scheduled dates when this event will take place. Some events require registration for attendance so you will need to click on the date for more information regarding the specific event.

If you don't see the date you prefer, please email us at training@juniper.net to request a date or schedule your custom training session.

Display dates for 

 
Date  Subject Theater Location Facilitator Language
12/16/2019 Junos Class of Service (JCOS) - ILT & ILO Americas (AMER) Vancouver & Calgary Cosmos Security English
12/16/2019 Junos Class of Service (JCOS) - ILT & ILO Americas (AMER) Live Virtual Online Cosmos Security English
12/16/2019 Junos Class of Service (JCOS) Europe, Middle East and Africa (EMEA) Amsterdam + live online Tech Data English
12/19/2019   Europe, Middle East and Africa (EMEA) London - Old Broad Street Global Knowledge EMEA English
12/19/2019 Junos Class of Service (JCOS) - ILO Europe, Middle East and Africa (EMEA) EMEA Online Global Knowledge EMEA English
1/13/2020 Junos Class of Service (JCOS) - ILT Europe, Middle East and Africa (EMEA) Rueil Malmaison, France Global Knowledge EMEA French
1/28/2020 Junos Class of Service (JCOS) - ILT & ILO Asia Pacific (APAC) SYD + Online Crystal Echo English
1/28/2020 JCOS - Junos Class of Service Asia Pacific (APAC) Sydney AU Crystal Echo English
2/5/2020 9:00 AM (W. Europe Standard Time) Junos Class of Service (JCOS) - ILO Europe, Middle East and Africa (EMEA) EMEA Online Juniper Networks English
3/10/2020 JCOS - Junos Class of Service Asia Pacific (APAC) Melbourne AU Crystal Echo English
3/10/2020 Junos Class of Service (JCOS) - ILT & ILO Asia Pacific (APAC) MEL + Online Crystal Echo English
3/30/2020 Junos Class of Service (JCOS) Europe, Middle East and Africa (EMEA) Amsterdam + live online Tech Data English
4/9/2020 Junos Class of Service (JCOS) - ILO Europe, Middle East and Africa (EMEA) EMEA Online Global Knowledge EMEA English
6/29/2020 Junos Class of Service (JCOS) Europe, Middle East and Africa (EMEA) Amsterdam + live online Tech Data English
8/3/2020 Junos Class of Service (JCOS) - ILO Europe, Middle East and Africa (EMEA) EMEA Online Global Knowledge EMEA English
9/7/2020 Junos Class of Service (JCOS) - ILT Europe, Middle East and Africa (EMEA) Rueil Malmaison, France Global Knowledge EMEA French