The Nuage Network driver works jointly with Nuage Networks VSP.
A pre-requisite for the nuage BGPVPN driver is that the Nuage-specific installation and configuration steps have been applied; in particular the installation of the nuage_neutron package. Please refer to Nuage Networks documentation.
The driver will be enabled, by specifying in /etc/neutron/networking_bgpvpn.conf:
[service_providers]
service_provider = BGPVPN:Nuage:nuage_neutron.bgpvpn.services.service_drivers.driver.NuageBGPVPNDriver:default