Book Image

Network Automation with Go

By : Nicolas Leiva, Michael Kashin
Book Image

Network Automation with Go

By: Nicolas Leiva, Michael Kashin

Overview of this book

Go’s built-in first-class concurrency mechanisms make it an ideal choice for long-lived low-bandwidth I/O operations, which are typical requirements of network automation and network operations applications. This book provides a quick overview of Go and hands-on examples within it to help you become proficient with Go for network automation. It’s a practical guide that will teach you how to automate common network operations and build systems using Go. The first part takes you through a general overview, use cases, strengths, and inherent weaknesses of Go to prepare you for a deeper dive into network automation, which is heavily reliant on understanding this programming language. You’ll explore the common network automation areas and challenges, what language features you can use in each of those areas, and the common software tools and packages. To help deepen your understanding, you’ll also work through real-world network automation problems and apply hands-on solutions to them. By the end of this book, you’ll be well-versed with Go and have a solid grasp on network automation.
Table of Contents (18 chapters)
1
Part 1: The Go Programming Language
6
Part 2: Common Tools and Frameworks
10
Part 3: Interacting with APIs

Internet Layer

The Internet layer, or network layer in the OSI model, is in charge of transferring variable-length network packets and routing data from a source to a destination through one or more networks.

The predominant protocol in this layer today is the Internet Protocol (IP) on any of its two versions: version 4 (IPv4) and version 6 (IPv6). The Internet layer also includes diagnostic protocols like Internet Control Message Protocol (ICMP), a secure network protocol suite such as Internet Protocol Security (IPsec), and routing protocols including Open Shortest Path First (OSPF).

The Internet Protocol exchanges information via IP datagrams built from a header and a payload, which the link layer then transmits as frames over specific network hardware like Ethernet. The IP header carries the IP source and destination addresses of a packet used to route it through the Internet.

In this section we review:

  • How to use the net package to parse and perform common tasks with IP addresses...