Book Image

Mastering Python Networking - Second Edition

By : Eric Chou
Book Image

Mastering Python Networking - Second Edition

By: Eric Chou

Overview of this book

Networks in your infrastructure set the foundation for how your application can be deployed, maintained, and serviced. Python is the ideal language for network engineers to explore tools that were previously available to systems engineers and application developers. In this second edition of Mastering Python Networking, you’ll embark on a Python-based journey to transition from traditional network engineers to network developers ready for the next-generation of networks. This book begins by reviewing the basics of Python and teaches you how Python can interact with both legacy and API-enabled network devices. As you make your way through the chapters, you will then learn to leverage high-level Python packages and frameworks to perform network engineering tasks for automation, monitoring, management, and enhanced security. In the concluding chapters, you will use Jenkins for continuous network integration as well as testing tools to verify your network. By the end of this book, you will be able to perform all networking tasks with ease using Python.
Table of Contents (15 chapters)

The Ansible Cisco example

Cisco's support in Ansible is categorized by the operating systems IOS, IOS-XR, and NX-OS. We have already seen a number of NX-OS examples, so in this section let's try to manage IOS-based devices.

Our host file will consist of two hosts, R1 and R2:

[ios_devices]
R1 ansible_host=192.168.24.250
R2 ansible_host=192.168.24.251

[ios_devices:vars]
username=cisco
password=cisco

Our playbook, cisco_5.yml, will use the ios_command module to execute arbitrary show commands:

    ---
- name: IOS Show Commands
hosts: "ios_devices"
gather_facts: false
connection: local

vars:
cli:
host: "{{ ansible_host }}"
username: "{{ username }}"
password: "{{ password }}"
transport: cli

tasks:
- name: ios show commands
ios_command:
commands...