Book Image

Practical Network Automation

By : Abhishek Ratan
Book Image

Practical Network Automation

By: Abhishek Ratan

Overview of this book

Network automation is the use of IT controls to supervise and carry out every-day network management functions. It plays a key role in network virtualization technologies and network functions. The book starts by providing an introduction to network automation, SDN, and its applications, which include integrating DevOps tools to automate the network efficiently. It then guides you through different network automation tasks and covers various data digging and reporting methodologies such as IPv6 migration, DC relocations, and interface parsing, all the while retaining security and improving data center robustness. The book then moves on to the use of Python and the management of SSH keys for machine-to-machine (M2M) communication, all followed by practical use cases. The book also covers the importance of Ansible for network automation including best practices in automation, ways to test automated networks using different tools, and other important techniques. By the end of the book, you will be well acquainted with the various aspects of network automation.
Table of Contents (14 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Controller-based network fabric


As we come out of the legacy hardware era in which each physical path was connected and designed to take traffic from one point to another, and where a packet had limited availability to reach from one device to another, SDN is ensuring that we have a network fabric for our data to reach between different sources and destinations.

A network fabric is a collection of different network devices connected to each other by a common controller ensuring that each component in the network is optimized to send traffic among each of the nodes. The underlying switch fabric, which is a physical switchboard with ports (like Ethernet, ATM, and DSL), is also controlled and programmed by a controller which can ensure (by creating a path or specific port(s)) that a particular type of data can traverse through to reach its destinations.

In a typical network design we have Layer 2 (or switching domains) and Layer 3 (or routing domains). If we do not have a controller-based approach...