Book Image

Learning OpenStack Networking (Neutron)

By : James Denton
Book Image

Learning OpenStack Networking (Neutron)

By: James Denton

Overview of this book

OpenStack Neutron is an OpenStack component that provides networking as a service for other OpenStack services to architect networks and create virtual machines through its API. This API lets you define network connectivity in order to leverage network capabilities to cloud deployments. Through this practical book, you will build a strong foundational knowledge of Neutron, and will architect and build an OpenStack cloud using advanced networking features. We start with an introduction to OpenStack Neutron and its various components, including virtual switching, routing, FWaaS, VPNaaS, and LBaaS. You’ll also get hands-on by installing OpenStack and Neutron and its components, and use agents and plugins to orchestrate network connectivity and build a virtual switching infrastructure. Moving on, you’ll get to grips with the HA routing capabilities utilizing VRRP and distributed virtual routers in Neutron. You’ll also discover load balancing fundamentals, including the difference between nodes, pools, pool members, and virtual IPs. You’ll discover the purpose of security groups and learn how to apply the security concept to your cloud/tenant/instance. Finally, you' ll configure virtual private networks that will allow you to avoid the use of SNAT and floating IPs when connecting to remote networks.
Table of Contents (21 chapters)
Learning OpenStack Networking (Neutron) Second Edition
About the Author
About the Reviewers

Network types supported by Neutron

With the ML2 plugin, Neutron supports a range of traditional and overlay networking types provided by type drivers, including:

  • Local

  • Flat

  • VLAN


  • GRE

A local network is one that is isolated from other networks and nodes. Instances connected to a local network may communicate with other instances in the same network on the same compute node but may be unable to communicate with instances in the same network that reside on another host. Because of this designed limitation, local networks are recommended for testing purposes only.

In a flat network, no VLAN tagging or other network segregation takes place. In some configurations, instances can reside in the same network as the host machines.

VLAN networks are networks that utilize 802.1q tagging to segregate network traffic. Instances in the same VLAN are considered part of the same network and are in the same layer 2 broadcast domain. InterVLAN routing, or routing between VLANs, is only possible through the use...