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

Measuring BGP Update propagation time

As the standard ping, the bgp-ping application works by sending and receiving probe messages. A sender embeds a probe in a BGP Update message and sends it to its BGP neighbor. We encode the probe as a custom BGP optional transitive attribute, which allows it to propagate transparently throughout the network until it reaches one of the bgp-ping responders.

A bgp-ping responder recognizes this custom transitive attribute and reflects it back to the sender. This gives the sender a measure of BGP Update propagation delay within the network, which is then reported to an external metric consumer or printed on a screen.

Since the bgp-ping application needs to inter-operate with real BGP stacks, at the very least it has to implement the initial exchange of Open messages to negotiate the BGP session capabilities, followed by the periodic exchange of Keepalive messages. We also need to do the following:

  1. Send BGP Update messages triggered by...