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

Conditions and loops


Conditions are checked using a left and right value comparison. The evaluation returns either true or false, and a specific action is performed depending on the result.

There are certain condition operators that are used to evaluate the left and right value comparisons:

Operators

Meaning

==

If both values are equal

!=

If both values are NOT equal

>

If the left value is greater than the right value

<

If the left value is smaller than the right value

>=

If the left value is greater than or equal to the right value

<=

If the left value is lesser than or equal to the right value

in

If the left value is part of the right value

 

An example of the condition evaluation is as follows:

As we can see, we are checking whether 2>3 (2 is greater that 3). Of course, this would result in false, so the action in the else section is executed. If we reverse the check, 3>2, then the output would have been left value is greater.

In the preceding example, we used the if condition block, which...