Book Image

Mastering Python Networking

Book Image

Mastering Python Networking

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)
Title
Humble Bundle
Credits
Foreword
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
12
OpenStack, OpenDaylight, and NFV

BGP migration example


BGP is becoming the protocol of choice in intra and inter autonomous system networking, essentially using the same protocol for both IGP and border. There are many reasons for this. The fact that it is a robust and self-sustaining protocol makes it an ideal candidate for building scaled out network. Not surprisingly, BGP has the maximum support amongst SDN technologies. We have already seen that Ryu has a solid BGP speaker library. Let us use a mock scenario to see how we can construct a migration plan or use it in a hybrid mode.

Note

RyuBGPDriver is also used as the plugin for BGP Speaker in OpenStack, https://docs.openstack.org/developer/neutron-dynamic-routing/functionality/bgp-speaker.html. Understanding Ryu BGP usage can possibly help you with OpenStack BGP speaker in the future.

To begin, let's look at our scenario.

Migration segmentation

Let us assume that BGP is used between all the following scaled down nodes. The spine-1 is used as an aggregation router for leaf...