In the Chapter 4, Virtual Network Infrastructure Using Linux Bridges, and Chapter 5, Building a Virtual Switching Infrastructure Using Open vSwitch , we laid down a virtual switching infrastructure that would support the OpenStack Neutron networking features that we have discussed in this book. In this chapter, we will build network resources on top of that foundation. These will be able to be consumed by instances.

In this chapter, I will guide you through the following tasks:

• Managing networks using the CLI and dashboard
• Managing IPv4 subnets using the CLI and dashboard
• Managing subnet pools
• Creating ports

Networks, subnets, and ports are the core resources of the Neutron API, which was introduced in Chapter 3, Installing Neutron. The relationship between these core resources and instances and other virtual network devices can be observed in the following sections.