Book Image

Learning OpenDaylight

By : Reza Toghraee
Book Image

Learning OpenDaylight

By: Reza Toghraee

Overview of this book

OpenDaylight is an open source, software-defined network controller based on standard protocols. It aims to accelerate the adoption of Software-Defined Networking (SDN) and create a solid foundation for Network Functions Virtualization (NFV). SDN is a vast subject; many network engineers find it difficult to get started with using and operating different SDN platforms. This book will give you a practical bridge from SDN theory to the practical, real-world use of SDN in datacenters and by cloud providers. The book will help you understand the features and use cases for SDN, NFV, and OpenDaylight. NFV uses virtualization concepts and techniques to create virtual classes for node functions. Used together, SDN and NFV can elevate the standards of your network architecture; generic hardware-saving costs and the advanced and abstracted software will give you the freedom to evolve your network in the future without having to invest more in costly equipment. By the end of this book, you will have learned how to design and deploy OpenDaylight networks and integrate them with physical network switches. You will also have mastered basic network programming over the SDN fabric.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface

Viewing the flow mappings


Mininet allows you to use the dpctl command to communicate with the virtual switch and get the status of the flows.

The basic command to check the flows is dpctl dump-flows:

The preceding output shows the current flow table in both s1 and s2 virtual switches.

Are you looking for the MAC addresses or IP addresses of the source and destination in the preceding screenshot? For sure, you are! But remember that this is the output you receive after running the pingall example. In the pingall example, OpenDaylight has created a flow entry in switches to simply send all packets from port 1 to port 2 on each switch and vice versa.

If OpenDaylight configures a specific flow with an IP address or MAC address, then you will be able to see more details in your flow table.

Try running Mininet with more hosts and different topologies for practice; capture the packets and check the flow table of the switches. This will help you get friendlier with OpenDaylight and OpenFlow.