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FRCJUN-1Juniper Networks

Introduction to Junos Operating System (IJOS)

This 4-day instructor-led course introduces learners to the fundamentals of Junos OS used in networking equipment from Juniper Networks.

Duration · 4 daysVirtual + In-PersonInstructor-Led

$3,850

Course Description

This 4-day instructor-led course introduces learners to the fundamentals of Junos OS used in networking equipment from Juniper Networks. Students gain hands-on experience navigating the CLI, understanding configuration structure, managing interfaces, and performing basic routing and troubleshooting tasks in Junos-based environments.

By the end of the course, participants will be able to confidently operate Junos devices and perform foundational network configuration and verification tasks.

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Audience Profile

This course is intended for:

  • Entry-level network engineers
  • IT professionals transitioning to Juniper environments
  • Government, DoD, and enterprise network support staff
  • Candidates preparing for JNCIA-Junos-level knowledge

Prerequisites

Before enrolling, you should have:

  • Basic networking knowledge (OSI model, TCP/IP)
  • Familiarity with routing and switching concepts
  • No prior Junos experience required

— What You'll Learn —

Learning Objectives

In this course, you will learn to:

  • 1Explain the most important benefits of Junos OS and describe the kind of devices that run it.
  • 2Explain how to remotely connect to the Junos CLI, and how to use operational mode to verify system information.
  • 3Describe the reasons that IPv6 was created and explain how to read an IPv6 address.
  • 4Explain the difference between a physical network interface and a logical unit.
  • 5Demonstrate how the Junos OS CLI can reveal detailed information about network interfaces.
  • 6Describe how Junos OS stores its configuration using a logical and hierarchical structure.
  • 7Demonstrate how to deploy configuration in Junos OS, and how the commit process helps to prevent mistakes.
  • 8Demonstrate the commands and keyboard shortcuts that make Junos CLI configurations more efficient.
  • 9Describe how routes enter a routing table, and how routers choose the best routes for forwarding traffic.
  • 10Describe how static routes manually install routing information into a router.
  • 11Describe how routing protocols can automatically find the best path to remote destinations.
  • 12Demonstrate how to deploy OSPF to automatically advertise and learn prefixes in a single network.
  • 13Explain how to manage a switch that runs Junos OS.
  • 14Explain how to manage a switch that runs Junos OS.
  • 15Demonstrate how to enable some crucial Junos OS administrative features.
  • 16Describe the most important things to consider when deploying a new device that runs Junos OS.
  • 17Demonstrate how knowledge of the underlying Junos OS architecture can bring advantages to network operators.
  • 18Demonstrate how a knowledge of the underlying Junos OS software helps you when upgrading Junos and troubleshooting networks.
  • 19Demonstrate the most important and useful tools available in Junos OS that can help you fix real-world problems.
  • 20Explain how Junos OS can filter and manipulate traffic in real time using stateless firewall filters.
  • 21Explain how to configure stateless firewall filters that accept or discard packets.
  • 22Demonstrate some powerful CLI configuration options that can increase your productivity.
  • 23Describe the advantages and configuration of a variety of different interface types and features.
  • 24Demonstrate how the architecture of Junos OS is built with automation in mind.
  • 25Explain how to continue your studies once the course has been completed.

— Day-by-Day —

Course Outline

Day 1 – Junos OS Fundamentals & Navigation

Module 1

Introduction to Junos Architecture

  • Junos OS architecture overview
  • Separation of control, forwarding, and management planes
  • Software components and routing engine basics

Module 2

Initial Device Access

  • Console access and login procedures
  • Command-line interface (CLI) modes
  • Operational vs configuration mode

Module 3

Basic CLI Navigation

  • Command hierarchy and structure
  • Help system and command completion
  • Basic operational commands

Lab 1

First Login and CLI Exploration

  • Accessing a Junos device
  • Navigating operational mode
  • Running basic show commands

Day 2 – Configuration Fundamentals

Module 4

Configuration Structure

  • Hierarchical configuration model
  • Candidate configuration vs active configuration
  • Committing changes safely

Module 5

Basic System Configuration

  • Hostname configuration
  • Management access setup
  • User accounts and authentication

Module 6

Interface Configuration Basics

  • Interface naming conventions
  • Configuring IP addresses
  • Interface status and verification

Lab 2

Basic Device Configuration

  • Configure system identity
  • Configure management interface
  • Verify connectivity

Day 3 – Routing & Switching Fundamentals

Module 7

Routing Concepts in Junos

  • Routing tables overview
  • Direct, static, and dynamic routes
  • Next-hop concepts

Module 8

Static Routing Configuration

  • Creating static routes
  • Default route configuration
  • Route verification commands

Module 9

Switching Basics

  • VLAN concepts in Junos
  • Access vs trunk ports
  • Basic bridge domains overview

Lab 3

Basic Routing Setup

  • Configure static routes
  • Verify routing table
  • Test end-to-end connectivity

Day 4 – Monitoring, Troubleshooting & Review

Module 10

Monitoring Tools in Junos

  • Show commands for troubleshooting
  • Interface monitoring
  • System logs overview

Module 11

Basic Troubleshooting Methodology

  • Layered troubleshooting approach
  • Checking interfaces, routes, and logs
  • Identifying configuration errors

Module 12

Configuration Backup & Recovery

  • Saving configurations
  • Rollback operations
  • Operational safety practices

Lab 4

Troubleshooting Scenario

  • Diagnose connectivity issue
  • Correct misconfiguration
  • Validate full network operation

— The Big Picture —

Key Takeaways

  • Review of key Junos concepts
  • Operational best practices

— Where to Next —

Recommended Certifications

Industry-recognized credentials that build on what this course covers.

  • JNCIA-Junos certification path

Note: Course outlines are provided as a general guide. Content, pacing, labs, and instructional emphasis may vary based on instructor expertise, student experience levels, and customer-specific learning objectives.

— Keep Exploring —

Need a different angle?

Browse the full Juniper Networks catalog or chat with an advisor about a custom training plan for your team.