Open vSwitch configuration

By default, the RDO installation you ran back in Chapter 2, RDO Installation, installed Open vSwitch, or OVS for short, and configured the Neutron Open vSwitch plugin for you. Open vSwitch is virtual-networking software that allows you to create virtual switches on your nodes and ties the virtual switches on your nodes together by way of a configured transport. A configured transport is a defined method for the virtual switches to talk to each other. As traffic comes out of an instance, it travels through these connections between each of the virtual switches. There are three common methods for configuring OVS, which are explained here.

VLAN

Virtual Local Area Network (VLAN) is the most complex to set up. This is because the hardware switch that carries your traffic must be configured properly to carry the VLAN tagging that is assigned to the traffic. When the network traffic is traveling through one of the virtual networks, it is assigned a VLAN tag, which is simply...