Neutron - networking service

Neutron is a service that allows users to manage virtual network resources and IP addresses.

If one wants to boot an instance, they typically need to provide a virtual network on which to boot that instance so that it has network connectivity. With Neutron, users can view their own networks, subnets, firewall rules, and routers—all through the Horizon dashboard, CLI, or API. One's ability to create and manage network resources depends on the specific role they have been assigned.

Neutron also contains a modular framework powered by a variety of plugins, agents, and drivers, including Linux bridge and Open vSwitch.