They have been heavily used in IP/MPLS WAN backbones since the early 2000’s. creating reachability between Neutron ports and BGP VPNs outside the cloud datacenter leveraging these BGP VPNs in Neutron’s backend, to benefit from the flexibility, robustness and scalability of the underlying technology BaGPipe proposal is to address these two use cases by implementing this protocol stack – both the BGP routing protocol extensions and the dataplane encapsulation – in compute nodes or possibly ToR switches, and articulating it with Neutron thanks to drivers and plugins.