Introduction to the Junos Operating System (IJOS)

The Introduction to the Junos Operating System (IJOS) course is a 3-day course that is designed to teach students the foundational knowledge required to work with the Juniper Networks Junos operating system and to configure Junos devices. The course begins with a brief overview of the Junos device families and discusses the key architectural components of the software. Key topics covered in the course 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 dives into foundational routing knowledge and configuration examples including general routing concepts, routing policy, and firewall filters.

• Describing the basic design architecture of the Juniper Networks Junos OS.
• Identifying and providing a brief overview of Junos devices.
• Navigating within the Junos CLI.
• Performing tasks within the CLI operational and configuration modes.
• Restoring a Junos device to its factory-default state.
• Performing initial configuration tasks.
• Configuring and monitoring network interfaces.
• Describing user configuration and authentication options.
• Performing secondary configuration tasks for features and services such as system logging (syslog) and tracing, Network Time Protocol (NTP), configuration archival, and SNMP.
• Monitoring basic operation for the Junos OS and devices.
• Identifying and using network utilities.
• Upgrading the Junos OS.
• Performing file system maintenance and password recovery on a Junos device.
• Navigating within the Junos J-Web interface.
• Explaining basic routing operations and concepts.
• Viewing and describing routing and forwarding tables.
• Configuring and monitoring static routing.
• Configuring and monitoring OSPF.
• Describing the framework for routing policy and firewall filters.
• Explaining the evaluation of routing policy and firewall filters.
• Identifying instances where you might use routing policy.
• Writing and applying a routing policy.
• Identifying instances where you might use firewall filters.
• Writing and applying a firewall filter.
• Describing the operation and configuration for unicast reverse path forwarding (RPF).

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

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

Day 1

Chapter 1: Course Introduction

Chapter 2: Junos Operating System Fundamentals

• The Junos OS
• Traffic Processing
• Platforms Running the Junos OS

Chapter 3: User Interface Options – The Junos CLI

• User Interface Options
• The Junos CLI: CLI Basics
• The Junos CLI: Operational Mode
• The Junos CLI: Configuration Mode

Chapter 4: User Interface Options – The J-Web Interface

• The J-Web GUI
• Configuration
• Lab 1: The Junos CLI

Chapter 5: Initial Configuration

• Factory-Default Configuration
• Initial Configuration
• Interface Configuration

Lab 2: Initial System Configuration

Day 2

Chapter 6: Secondary System Configuration

• User Configuration and Authentication
• System Logging and Tracing
• Network Time Protocol
• Archiving Configurations
• SNMP

Lab 3: Secondary System Configuration

Chapter 7: 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 8: Interface Configuration Examples

• Review of the Interface Configuration Hierarchy
• Interface Configuration Examples
• Using Configuration Groups

Chapter 9: Routing Fundamentals

• Routing Concepts: Overview of Routing
• Routing Concepts: The Routing Table
• Routing Concepts: Routing Instances
• Static Routing
• Dynamic Routing

Lab 5: Routing Fundamentals

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

Chapter 13: JTAC Procedures

• Opening a Support Case
• Customer Support Tools
• Transferring Files to JTACT

Chapter 14: Juniper Security Concepts

• Security Challenges
• Juniper’s Security Focus

Appendix A: IPv6 Fundamentals

• IPv6 Addressing
• Protocols and Services
• Configuration

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