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.

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Software-Defined Networking (SDN) with OpenStack
Sreenivas Voruganti | Sriram Subramanian
Oct, 2016 | 216 pages
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Table of Contents (16 chapters)
Software-Defined Networking (SDN) with OpenStack
Software-Defined Networking (SDN) with OpenStack
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
OpenStack Networking in a Nutshell
OpenStack Networking in a Nutshell
Virtual and physical networking
Layer 2 (L2) capabilities in OpenStack
Layer 3 (L3) capabilities in OpenStack
Securing network traffic in OpenStack
Advanced networking services
OpenStack and SDN context
Summary
2
Introduction to Software-Defined Networking
Introduction to Software-Defined Networking
Components of traditional networks
Challenges faced by traditional networks
SDN reference architecture
SDN and OpenStack
Summary
3
SDN Protocols
SDN Protocols
Getting familiar with SDN protocols
Configuration management protocols
Understanding OpenFlow
Summary
4
SDN Networking with Open vSwitch
SDN Networking with Open vSwitch
OVS Networking with Linux Network namespace
OVS networking with SDN controller
OVS and Mininet
OVS connected to virtual machines
OpenStack Neutron
Summary
5
Getting Started with OpenDaylight
Getting Started with OpenDaylight
Introduction to OpenDaylight
Architecture of OpenDaylight
Installing ODL
Using ODL to manage Open vSwitch
Installing and configuring OVS
Managing OVS Using OpenDaylight
ODL and OpenStack
Summary
6
Using OpenDaylight with OpenStack
Using OpenDaylight with OpenStack
Integrating OpenDaylight with OpenStack
Configuring OpenStack Neutron for ODL
Introduction to Virtual Tenant Network (VTN)
VTN and OpenStack
Summary
7
Getting Started with OpenContrail
Getting Started with OpenContrail
Introduction to OpenContrail
OpenContrail architecture
Putting it all together
Installing OpenContrail
OpenContrail and OpenStack
Summary
8
OpenContrail Networking with OpenStack
OpenContrail Networking with OpenStack
OpenContrail integration with OpenStack
Virtual network management in OpenContrail
Flow of data packets in OpenContrail
Service chaining using OpenContrail
Summary
9
Open Network Operating System (ONOS)
Open Network Operating System (ONOS)
Introduction to ONOS
Architecture of ONOS
Using ONOS to manage Open vSwitch
Intent framework
Distributed ONOS
Central Office Re-architected as Datacenter
Extensible Cloud Operating System
Summary
10
OVN and Open vSwitch Enhancements
OVN and Open vSwitch Enhancements
Open vSwitch components in network node
Open vSwitch components in compute host
OVN - Native Virtual Networking Open vSwitch
OVN and OpenStack
Neutron Dragonflow
Data Path Development Kit (DPDK)
Summary

Open vSwitch components in network node

Let us begin with an overview of Open vSwitch bridges created in the network node.

The Open vSwitch agent creates the following OVS bridge interfaces as per configuration options:

  • br-int: Network service components connect to this OVS Integration Bridge to offer services such as DHCP, SNAT, and routing. Compute instances connect to this bridge to obtain network services.

  • br-vlan, br-tun: This communicates with compute nodes on the Tunnel Bridge. It has open flow rules to match and forward the traffic destined to the services on the network node or else drops the packets.

  • br-ex: Traffic to external network flows through br-ex via the interface in the router name space, which connects to the br-ex as tap interface.

    Figure 1: OVS bridges on a network node

Neutron DHCP

The DHCP agent managing the qdhcp network namespaces provides DHCP services for instances.

Neutron routing

The Neutron router routes traffic between north-south and east-west network traffic...

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