Book Image

Software-Defined Networking (SDN) with OpenStack

By : Sreenivas Voruganti, Sriram Subramanian
Book Image

Software-Defined Networking (SDN) with OpenStack

By: Sreenivas Voruganti, Sriram Subramanian

Overview of this book

Networking is one the pillars of OpenStack and OpenStack Networking are designed to support programmability and Software-Defined Networks. OpenStack Networking has been evolving from simple APIs and functionality in Quantum to more complex capabilities in Neutron. Armed with the basic knowledge, this book will help the readers to explore popular SDN technologies, namely, OpenDaylight (ODL), OpenContrail, Open Network Operating System (ONOS) and Open Virtual Network (OVN). The first couple of chapters will provide an overview of OpenStack Networking and SDN in general. Thereafter a set of chapters are devoted to OpenDaylight (ODL), OpenContrail and their integration with OpenStack Networking. The book then introduces you to Open Network Operating System (ONOS) which is fast becoming a carrier grade SDN platform. We will conclude the book with overview of upcoming SDN projects within OpenStack namely OVN and Dragonflow. By the end of the book, the readers will be familiar with SDN technologies and know how they can be leveraged in an OpenStack based cloud.
Table of Contents (16 chapters)
Software-Defined Networking (SDN) with OpenStack
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Preface

Intent framework


Let's now install intent to communicate directly between the hosts. The ONOS intent framework allows operators to define policies using a high-level abstraction or language. It is the responsibility of the ONOS controller to translate those policies into a network configuration. This helps create networking constructs that are vendor and device-agnostic, while at the same time, it simplifies day-to-day operations. We will see that the semantics for configuration are based on intent rather than on the mechanism of the desired configuration:

  1. Uninstall the switch application and add host-intent in ONOS, as shown in the following screenshot:

  2. Check the ONOS GUI to confirm intents are installed:

  3. Check the OVS table to verify programming of the flow tables:

As we can see from the preceding example, ONOS takes the intent configuration and programs the network nodes appropriately to translate the intent to the actual configuration. This abstraction enables the network administrator...