Juniper Introduction to the Junos Operating System (IJOS)

This three-day course provides students with the foundational knowledge required to work with the Junos operating system and to configure Junos devices. The course provides a brief overview of the Junos device families and discusses the key architectural components of the software. Key topics include user interface options with a heavy focus on the command-line interface (CLI), configuration tasks typically associated with the initial setup of devices, interface configuration basics with configuration examples, secondary system configuration, and the basics of operational monitoring and maintenance of Junos devices. The course then delves into foundational routing knowledge and configuration examples including general routing concepts, routing policy, and firewall filters. Through demonstrations and hands-on labs, students will gain experience in configuring and monitoring the Junos OS and monitoring basic device operations. This course is based on Junos OS Release 15.1X49.


Course Outline

Day 1
Chapter 1: Course Introduction

Chapter 2: Junos Operating System Fundamentals

  • The Junos OS

  • Traffic Processing

  • Overview of Junos Devices

Chapter 3: User Interface Options

  • User Interface Options

  • The Junos CLI: CLI Basics

  • The Junos CLI: Operational Mode

  • The Junos CLI: Configuration Mode

  • Lab 1: The Junos CLI

Chapter 4: Initial Configuration

  • Factory-Default Configuration

  • Initial Configuration

  • Interface Configuration

  • Lab 2: Initial System Configuration

Chapter 5: Secondary System Configuration

  • User Configuration and Authentication

  • System Logging and Tracing

  • Network Time Protocol

  • Archiving Configurations

  • SNMP

  • Lab 3: Secondary System Configuration

Day 2
Chapter 6: Operational Monitoring and Maintenance

  • Monitoring Platform and Interface Operation

  • Network Utilities

  • Maintaining the Junos OS

  • Password Recovery

  • System Clean-Up

  • Lab 4: Operational Monitoring and Maintenance

Chapter 7: Interface Configuration Examples

  • Review of the Interface Configuration Hierarchy

  • Interface Configuration Examples

  • Using Configuration Groups

Chapter 8: The J-Web Interface

  • The J-Web GUI

  • Configuration

  • Lab 5: The J-Web Interface

Day 3
Chapter 10: Routing Policy

  • Routing Policy Overview

  • Case Study: Routing Policy

  • Lab 6: Routing Policy

Chapter 11: Firewall Filters

  • Firewall Filters Overview

  • Case Study: Firewall Filters

  • Unicast Reverse-Path-Forwarding Checks

  • Lab 7: Firewall Filters

Chapter 12: Class of Service

  • CoS Overview

  • Traffic Classification

  • Traffic Queueing

  • Traffic Scheduling

  • Case Study: CoS

  • Lab 8: Class of Service


This course benefits individuals responsible for configuring and monitoring devices running the Junos OS.