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Networking Option 2: Self-service networks - Service layout - This will have extra 'Networking L3 agent' - The self-service networks option augments the provider networks option with layer-3 (routing) services that enable self-service networks using overlay segmentation methods such as VXLAN. Essentially, it routes virtual networks to physical networks using NAT. Additionally, this option provides the foundation for advanced services such as LBaaS and FWaaS.

Overview

docs.openstack.org

Overview

docs.openstack.org

OpenStack conceptual architecture | 2016

Conceptual architecture

docs.openstack.org

Logical architecture

docs.openstack.org