BGP dynamic routing enables the advertisement of self-service IPv4 and IPv6 network prefixes to network devices that support BGP, including many physical and virtual router and firewall devices. By advertising self-service networks attached to Neutron routers, the use of floating IPs can be avoided.
BGP dynamic routing consists of a Neutron API service plugin that implements the Networking service extension and an agent that manages BGP peering sessions. A cloud administrator creates and configures a BGP speaker using the CLI or API and manually schedules it to one or more hosts running the agent.
The following diagram demonstrates the BGP agent's peering relationship with a physical router that enables the physical route to reach self-service networks behind Neutron routers via a common provider network:
