Book Image

JUNOS Automation Cookbook

By : Adam Chappell
Book Image

JUNOS Automation Cookbook

By: Adam Chappell

Overview of this book

The JUNOS Automation Cookbook is a companion guide for the complex field of automating tasks on JUNOS devices. With a foundation in industry-standrd XML, JUNOS provides an ideal environment for programmatic interation, allowing you to build upon the capabilities provided by Juniper, with your own original code. You will begin by learning about, and setting up, the industry-standard NETCONF remote procedure call mechanisms on your device. After initial setup, you'll walk through SLAX - Juniper's foundation scripting language - for manipulating XML representations of JUNOS concepts and elements. You'll learn how to write your own SLAX scripts to customise the operating environment, and also how to write proactive event handlers that deal with situations as they happen. You'll then delve into PyEZ - Juniper's bridging framework to make automation accessible to Python code - allowing you to build automation applications in the popular scripting language. You'll witness some examples of how to write applications that can monitor configuration changes, implement BGP security policies and implement ad-hoc routing protocols, for those really tricky situations. You'll also leaarn how asynchronous I/O frameworks like Node.js can be used to implement automation applications that present an acceptable web interface. Along with way, you'll explore how to make use of the latest RESTful APIs that JUNOS provides, how to visualize aspects of your JUNOS network, and how to integrate your automation capabilities with enterprise-wide orchestration systems like Ansible. By the end of the book, you'll be able to tackle JUNOS automation challenges with confidence and understanding, and without hassle.
Table of Contents (10 chapters)

Introduction

In a lot of work that we do with network routers, switches and firewalls, we are forced to work with the raw command-line based interface that JUNOS supports. This has the advantage of being precise, exact, and always consistent and up to date with the functionalities and capabilities of the software. But it doesn't always lend itself well to communicating complex concepts to humans who might often benefit from alternate visual representations in order to process ideas more quickly and with better understanding.

One of the great benefits of Juniper's tightly-integrated XML API is the fact that there is a machine-readable interface to manipulate the core primitives and fundamentals of the JUNOS device. But secondarily, with this machine interface it is also possible to build alternate interface models onto the aspects of the working JUNOS OS system.

We&apos...