Zephyr is a system which complements tempest for direct OpenStack Neutron testing, without requiring keystone, nova, glance, or other OpenStack components to be installed. Zephyr aims to provide a loosely-coupled framework that can support various backend applications and vm/host-models (IP Net Namespaces, Docker, Bare-Iron, etc.) for a physical topology and use neutron (and only neutron) API directly to manage the virtual topology.