Last Updated : 20 Feb 2025

Junos Class of Service (JCOS) Course Overview

The Junos Class of Service (JCOS) course is designed to provide network professionals with a deep understanding of the Class of Service (CoS) mechanisms available in Junos OS used in Juniper Networks routers. The course focuses on the intricate details of CoS concepts, including their history, evolution, and how they are integrated into modern networks leveraging Differentiated Services (DiffServ). It covers the specifics of packet classification, policing, scheduling, hierarchical scheduling, and rewrite rules, each of which is crucial for implementing effective Quality of Service (QoS) policies.

Participants will delve into practical labs where they configure packet classification, policers, schedulers, and hierarchical schedulers. They'll also learn to set up rewrite rules and CoS-based forwarding (CBF) to ensure traffic is treated appropriately based on organizational requirements. The course culminates in a case study that reinforces the skills learned, with a focus on implementing CoS in a Voice over IP (VoIP) scenario. By the end of the JCOS course, learners will be equipped with valuable knowledge and hands-on experience to optimize network performance and reliability through advanced CoS configurations.

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Flexi Video	16,449
Official E-coursebook
Exam Voucher (optional)
Hands-On-Labs²	4,159
+ GST 18%	4,259
Total Fees (without exam & Labs)	22,359 (INR)
Total Fees (with Labs)	28,359 (INR)

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Free Pre-requisite Training

Join a free session to assess your readiness for the course. This session will help you understand the course structure and evaluate your current knowledge level to start with confidence.

Assessments (Qubits)

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Post Training Reports

Receive comprehensive post-training reports summarizing your performance. These reports offer clear feedback and recommendations to help you confidently take the next steps in your learning journey.

Class Recordings

Get access to class recordings anytime. These recordings let you revisit key concepts and ensure you never miss important details, supporting your learning even after class ends.

Free Lab Extensions

Extend your lab time at no extra cost. With free lab extensions, you get additional practice to sharpen your skills, ensuring thorough understanding and mastery of practical tasks.

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Join our free revision classes to reinforce your learning. These classes revisit important topics, clarify doubts, and help solidify your understanding for better training outcomes.

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1-on-1 Training

Schedule personalized sessions based upon your availability.

Learn More

Customized Training

Learning without limits. Create custom courses that fit your exact needs, from blended topics to brand-new content.

Learn More

Happiness Guaranteed

Experience exceptional training with the confidence of our Happiness Guarantee, ensuring your satisfaction or a full refund.

Learn More

Destination Training

Immerse yourself in a focused learning environment, free from distractions, where you can sharpen your skills in popular global destinations.

Learn More

Fly-Me-A-Trainer (FMAT)

Flexible on-site learning for larger groups. Fly an expert to your location anywhere in the world.

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Course Prerequisites

Certainly! For individuals interested in successfully undertaking the Junos Class of Service (JCOS) course, the following minimum prerequisites are recommended:

Basic understanding of networking concepts and terminology.
Familiarity with the Juniper Networks Junos operating system, including navigating its command line interface (CLI).
Prior experience with or knowledge of Junos routing and switching, equivalent to having attended the Introduction to the Junos Operating System (IJOS) and Junos Routing Essentials (JRE) courses.
An understanding of the fundamentals of traffic engineering and quality of service (QoS) mechanisms.

These prerequisites are designed to ensure that learners have a foundational knowledge base that will allow them to engage effectively with the course material and gain the maximum benefit from the training.

Junos Multicast Routing (JMR)

Junos Class of Service (JCOS)

Target Audience for Junos Class of Service (JCOS)

The Junos Class of Service (JCOS) course is designed for network professionals who manage and optimize Juniper Networks infrastructure.

Target audience for the Junos Class of Service (JCOS) course includes:

Network Engineers and Specialists
Network Administrators
Network Architects
Technical Support Personnel
Juniper Networks Partners and Resellers
Service Provider Operations Staff
IT Professionals working with QoS and traffic management
Professionals preparing for Juniper Networks Certification Programs (JNCIP, JNCIE)

Learning Objectives - What you will Learn in this Junos Class of Service (JCOS)?

Introduction to Learning Outcomes and Concepts

The Junos Class of Service (JCOS) course provides an in-depth understanding of CoS mechanisms within Junos, enabling efficient management of packet flows and service levels on Juniper networks.

Learning Objectives and Outcomes

Comprehend the history, evolution, and role of Class of Service (CoS) in modern networks.
Understand the relationship and differentiation between CoS and Differentiated Services (DiffServ).
Learn to identify and interpret CoS fields in packet headers and understand their significance in CoS processing.
Master the techniques of packet classification and how to apply different classification methods such as fixed, multifield, and behavior aggregate.
Gain expertise in configuring and managing policing on Juniper devices, including single-rate two-color and tricolor marking policers.
Acquire the ability to set up and customize scheduling features, including transmission rate, queue priority, delay buffers, and drop profiles.
Develop skills in hierarchical scheduling, understanding scheduler modes, levels, and queue properties within this context.
Learn to create and apply rewrite rules and tables to modify packet headers for CoS purposes.
Configure CoS-based forwarding (CBF) to ensure appropriate packet treatment based on CoS requirements.
Apply the acquired knowledge through a practical case study focusing on Voice over IP (VoIP), assessing CoS configurations across ingress, transit, and egress nodes.