Book Image

Mastering Python Networking

By : Eric Chou
Book Image

Mastering Python Networking

By: Eric Chou

Overview of this book

This book begins with a review of the TCP/ IP protocol suite and a refresher of the core elements of the Python language. Next, you will start using Python and supported libraries to automate network tasks from the current major network vendors. We will look at automating traditional network devices based on the command-line interface, as well as newer devices with API support, with hands-on labs. We will then learn the concepts and practical use cases of the Ansible framework in order to achieve your network goals. We will then move on to using Python for DevOps, starting with using open source tools to test, secure, and analyze your network. Then, we will focus on network monitoring and visualization. We will learn how to retrieve network information using a polling mechanism, ?ow-based monitoring, and visualizing the data programmatically. Next, we will learn how to use the Python framework to build your own customized network web services. In the last module, you will use Python for SDN, where you will use a Python-based controller with OpenFlow in a hands-on lab to learn its concepts and applications. We will compare and contrast OpenFlow, OpenStack, OpenDaylight, and NFV. Finally, you will use everything you’ve learned in the book to construct a migration plan to go from a legacy to a scalable SDN-based network.
Table of Contents (22 chapters)
Humble Bundle
About the Author
About the Reviewer
Customer Feedback
OpenStack, OpenDaylight, and NFV

The Ansible Juniper example

The Ansible Juniper module requires the Juniper PyEZ package and NETCONF. If you have been following the API example in Chapter 3, API and Intent-Driven Networking, you are good to go. If not, refer back to the section for installation instructions as well as some test script to make sure PyEZ works. The Python package called jxmlease is also required:

$ sudo pip install jxmlease

In the host file, we will specify the device and connection variables:

    J1 ansible_host=


In our module test, we will use the junos_facts module to gather basic facts for the device. This module is equivalent to the setup module and will come in handy if we need to take action depending on the returned value. Note the different value of transport and port in the example here:

    - name: Get Juniper Device Facts
      hosts: "junos_devices"
      gather_facts: false