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Introduction To The Junos Operating System (IJOS)

Course Overview

This is a three-day instructor-led course (delivered in-person or virtually) designed to introduce networking professionals to the fundamentals of the Junos operating system, used across Juniper Network devices

  • Duration: 3 days

Learning Objectives

After successfully completing this course, you should be able to:

  • Describe the basic design architecture of the Junos OS.
  • Identify and provide a brief overview of Junos devices.
  • Navigate within the Junos CLI.
  • Perform tasks within the CLI operational and configuration modes.
  • Restore a Junos device to its factory-default state.
  • Perform initial configuration tasks.
  • Configure and monitor network interfaces.
  • Describe user configuration and authentication options.
  • Monitor basic operation for the Junos OS and devices.
  • Perform secondary configuration tasks for features and services such as system logging (syslog) and tracing, Network Time Protocol (NTP), configuration archival, and SNMP.
  • Identify and use network utilities.
  • Upgrade the Junos OS.
  • Perform file system maintenance and password recovery on a Junos device.
  • Navigate within the Junos J-Web interface.
  • Explain basic routing operations and concepts.
  • View and describe routing and forwarding tables.
  • Configure and monitor static routing.
  • Configure and monitor OSPF.
  • Describe the framework for routing policy and firewall filters.
  • Explain the evaluation of routing policy and firewall filters.
  • Identify instances where you might use routing policy.
  • Write and apply a routing policy.
  • Identify instances where you might use firewall filters.
  • Write and apply a firewall filter.
  • Describe the operation and configuration for unicast reverse path forwarding (RPF).



Who Should Attend?

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


Prerequisites & Exams

Recommended Prerequisites:

  • Students should have basic networking knowledge and an understanding of the Open Systems Interconnection (OSI) reference model and the TCP/IP protocol suite.



Certification Examination

Participant may proceed to sit for the Junos Association (JNCIA-Junos) examination upon completion of course. Examination is not included. Written exam administered at Pearson VUE testing centers worldwide

  • Exam length: 90 minutes
  • Exam type: 65 multiple-choice questions



Course Outline

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


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
  • Using Configuration Groups


Chapter 8: The J-Web Interface

  • The J-Web GUI
  • Configuration
  • Lab 5: The J-Web Interface


Chapter 9: Routing Fundamentals

  • Routing Concepts: Overview of Routing
  • Routing Concepts: The Routing Table
  • Routing Concepts: Routing Instances
  • Static Routing
  • Dynamic Routing
  • Lab 6: Routing Fundamentals


Chapter 10: Routing Policy

  • Routing Policy Overview
  • Case Study: Routing Policy
  • Lab 7: Routing Policy


Chapter 11: Firewall Filters

  • Firewall Filters Overview
  • Case Study: Firewall Filters
  • Unicast Reverse-Path-Forwarding Checks
  • Lab 8: Firewall Filters


Chapter 12: Class of Service

  • CoS Overview
  • Traffic Classification
  • Traffic Queueing
  • Traffic Scheduling
  • Case Study: CoS
  • Lab 9: Class of Service


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