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Junos Class of Service (JCOS)

Length: Two days

Course 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 10.1R1.8.

Through demonstrations and hands-on labs, students will gain experience in configuring and verifying Junos CoS features.

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.

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.

Course Level

Advanced

Prerequisites

Students should have general knowledge of CoS concepts.

Students should attend the following courses:

• IJOS
• JRE
• JIR

Course Contents

Day One

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
• 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 Two

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

 

Certification Acronynm: JNCIP-SP

Certification Name: Junos Service Provider, Professional

Exam Code: JN0-660

Course Acronym: JCOS (Routing)

Certification Text

Exam code: JN0-660

Written exam administered at Prometric testing centers worldwide

Exam length: 120 minutes

Exam type: 70 multiple-choice questions

Pass/fail status is available immediately

Prerequisite certification: JNCIS-SP. Acceptable substitution: JNCIS-M

Junos Software Release: 10.3

Recommended Training:

Advanced Junos Service Provider Routing (AJSPR)

Junos Class of Service (JCOS)

Junos Multicast Routing (JMR)

Junos MPLS and VPNs (JMV)

Download Course Outline PDF

Dates	Location	Status	Registration
7th Aug 2012	Sydney, Australia		Add to cart
13th Aug 2012	Melbourne, Australia		Add to cart

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