Learning OpenStack Networking - Third Edition

Basic networking elements in Neutron

Neutron constructs the virtual network using elements that are familiar to most system and network administrators, including networks, subnets, ports, routers, load balancers, and more.

Using version 2.0 of the core Neutron API, users can build a network foundation composed of the following entities:

• Network: A network is an isolated Layer 2 broadcast domain. Typically, networks are reserved for the projects that created them, but they can be shared among projects if configured accordingly. The network is the core entity of the Neutron API. Subnets and ports must always be associated with a network.
• Subnet: A subnet is an IPv4 or IPv6 address block from which IP addresses can be assigned to virtual machine ...