Introduction | Python Network Programming for Network Engineers (Python 3)

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Python Network Programming for Network Engineers (Python 3)

By : David Bombal

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Python Network Programming for Network Engineers (Python 3)

By: David Bombal

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Overview of this book

The days of configuring Cisco networks only with the command-line interface (CLI) are ending. Do you want to program networks using Python, but not sure where to start? Well, this course will show you how you can start programming Cisco networks using Python within 20 minutes. The course begins by explaining the steps for setting up the lab and takes you through the concepts of network automation. Once you are ready with the environment and the basics, you will dive into automating networks. You will learn how to automate networks using Telnet, Secure Shell (SSH), Paramiko, Netmiko, and Network Automation and Programmability Abstraction Layer with Multivendor support (NAPALM). In the rest of the course, you will learn the various concepts of Python needed to automate the configuration of network devices. By the end of this course, you will be able to program networks and network devices using Python 3 and Graphical Network Simulator-3 (GNS3). All code files are available here: https://github.com/packtpublishing/python-network-programming-for-network-engineers-python-3-

Introduction

Lab Setup

Installing the Graphical Network Simulator (GNS3) 2.2 Graphical User Interface (GUI)

Installing the Graphical Network Simulator-3 (GNS3) 2.2 Virtual Machine

Graphical Network Simulator-3 (GNS3) IOS Images

Installing Continuous Machine Learning (CML) Virtual Internet Routing Lab (VIRL 2.0) - Part 1

Installing Continuous Machine Learning (CML) Virtual Internet Routing Lab (VIRL 2.0) - Part 2

Installing Emulated Virtual Environment (EVE)-New Generation (NG)

Emulated Virtual Environment (EVE)-New Generation (NG) Cisco Images

DevNet: Free Continuous Machine Learning (CML)

Quick Start Guide to Network Automation

Quick Start 1: Setting up the Graphical Network Simulator-3 (GNS3) Lab and Integrated Development Environments (IDEs)

Quick Start 2: Creating a Telnet Script

Quick Start 3: Testing a Telnet Script

Quick Start 4: Telnet to a Switch and Create VLANs

Quick Start 5: Loops

Quick Start 6: PEP8: Python Style Guide

Quick Start 7: Configuring Switch Virtual LANs (VLANs) Using Loops

Quick Start 8: Creating a Multiple Switch Network

Quick Start 9: Opening a File of Switch Internet Protocol (IP) Addresses

Quick Start 10: Configuring Multiple Switches with a Loop

Quick Start 11: Loops within Loops

Quick Start 12: Backup Network Device Configurations

Netmiko: Using Secure Shell (SSH) for Network Automation

Netmiko Part 1: Introduction

Netmiko Part 2: Enabling Secure Shell (SSH) on Switches in the Network

Netmiko Part 3: Your First Netmiko Secure Shell (SSH) Script

Netmiko Part 4: Scripting for Multiple Switches

Netmiko Part 5: Running a Script and Configuring Multiple Devices

Netmiko Part 6: File of Multiple Cisco Commands

Netmiko Part 7: Programming Multiple Switches with File of Commands

Netmiko Part 8: Scripting to Program an Entire Network

Netmiko Part 9: Running a Script to Program an Entire Network

Network Automation and Programmability Abstraction Layer with Multivendor support (NAPALM)

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) Introduction

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) Python 3 versus Python 2.7

Installing Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM)

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) Connect to Switch 1 (P68_14)

JSON and More Commands

Media Access Control (MAC) Address Table and Address Resolution Protocol (ARP) Cache

Network Automation and Programmability Abstraction Layer with Multivendor (NAPALM) and Border Gateway Protocol (BGP)

Using Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) to Retrieve Border Gateway Protocol (BGP) Neighbor Information - Part 1

Use Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) to retrieve Border Gateway Protocol (BGP) Neighbor Information - Part 2

Use Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) to Retrieve Border Gateway Protocol (BGP) Neighbor Information - Part 3

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM): Multiple Border Gateway Protocol (BGP) Neighbors

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) and Bigger Border Gateway Protocol (BGP) Network - Part 1

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) and Bigger Border Gateway Protocol (BGP) Network - Part 2

Using Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) for Device Configuration Audit and Changes

Using Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) to Configure Access Lists

Checking if Access Control List (ACL) Already Exists and Adding if Missing

Using Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) for Auditing Device Configurations

Using Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM) to Add Multiple Configuration Files

Network Automation and Programmability Abstraction Layer with Multivendor Support (NAPALM): Multiple Configuration Files and Multiple Devices

Iteration Examples: Netmiko Scripts

Netmiko Iteration: Script Overview

Netmiko Iteration (Script 1): Basic Script

Netmiko Iteration (Script 2): Opening a File of Commands

Netmiko Iteration (Script 3): Configuring Multiple Devices Using a File of Devices

Netmiko Iteration (Script 4): Removing Passwords from the Script

Netmiko Iteration (Script 5): Handling Exceptions (Error)

Netmiko Iteration (Script 6): Determining Device Types and Running a Specific Device Type

Netmiko Iteration (Script 7): Iterating Device Typescript

Netmiko Scaling

Part 1: Encrypted Password File

Part 2: Netmiko Sequential - Part 1

Part 3: Netmiko Sequential Part 2

Part 4: Netmiko Multithreading

Part 5: Netmiko Thread Pools

Python Theory

Theory Topics - Very Short

Keep Learning

Setting up Python 2.7 and 3

Python 2.7 and 3 Examples

Basic Hello World Scripts

Python Theory: Objects, Variables, and Data Types

Python Objects - Part 1

Python Objects - Part 2

Python Variables - Part 1

Python Variables - Part 2

Python Variables - Part 3

Python Variables - Part 4

Data Types

Testing Data Types

Python Theory: Numbers

Introduction

Numeric Types

Integer (Int) and Float Data Types

Operators - Part 1

Operators - Part 2

Operators - Part 3

Binary, Hexadecimal, and Octal

Binary, Decimal, and Octal Number Examples

Integer (int) Calculation

Floats

Python Theory: Strings

Strings

Converting to a String Using the str() Function

Escape Special Character Meaning with \

Strings

String Concatenation with the Addition (+) Operator

Multiplication (*) Operator

String Offsets - Extract Characters with []

string slice _ slicing

string slice _ slicing 2

string slice _ slicing 3

lower upper

startswith endswith Methods

Strip lstrip() and rstrip() Methods

isdigit() Method

count() Method

Old Style Text Using %

Strings: New Way to Do Text Using {}

dir() Method (P73_9)

Getting Version Information from a Switch

Getting Show Version from Switch

Telnet and String Offset

Showing Version Using the len() Method

Split Functions - Part 1

Split Functions - Part 2

list() and join() Methods

List and len - use Interface example

Index Introduction

Real Switch Get Version Using Index and Slice

Python 3 Telnet to Switch

count() Method

Using the find() Method to Get Information from a Real Switch

Python 3 Telnet versus Python 2 - Finding the Version of the Software

Find not Found

String Methods - upper() Method

String Methods - startswith() and endswith() Methods

String Methods - strip() Method

String Methods - split() Method

String Methods - join() Method

String Methods - Is It in a String?

String Concatenation

Capitalize, Upper, Lower, and Swap

Python Theory: Comparisons

Boolean Comparisons

Boolean Truth Table

Boolean Truth Table Demo

False Conditions

Python Theory: Lists

Lists versus Tuples

Lists

Creating a List Using Split

Lists in Lists

Lists versus Tuples - Documentation

list(), merge(), and extend() Methods

List Methods

lists insert and delete

list pop index and in

Reverse Sort

len copy list

Python Theory: Tuples

Tuples

Tuples and Sequences

Python Theory: Code Structures

Comments in Code

Line Continuation

Python Theory: If/Else/Else-if Logic

If Logic

Physical Router Demonstration

Else-if Logic

Python Theory: While Loops

While Loop

Infinite While Loop with Break

Infinite While Loop with Continue

While Loop with a List

While Loop with Else

Python Theory: For Loop

For Loop

For Loop with Dictionary

For Loop with If and Lists

Python Theory: Ranges

Ranges - Part 1

Ranges - Part 2

Python Theory: Dictionaries

Dictionary Theory

Dictionary Demonstration

Combining Dictionaries

Dictionaries: Clear and Check

Dictionaries: Adding values

Python Theory: Functions

Functions Introduction - Part 1

Functions Introduction - Part 2

Functions - Part 3

Functions - Netmiko and Router

Functions - Netmiko and Router (continued)

Function 6 - Named Keyword Arguments (Netmiko)

Python Network Programming for Network Engineers (Python 3)

By : David Bombal

Python Network Programming for Network Engineers (Python 3)

By: David Bombal

Overview of this book

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