...
Thanks to VPN-Proxy, MD-VPN service is also capable to deliver its services (L3VPN, point to point layer 2 circuit (i.e. Point-to-Point L2VPN), Multi-point L2VPN) in the same way as L3VPN and GÉANT plus service (i.e. IP packets over a BGPs peering and a VLAN for layer 2 circuit). The usage of VPN-Proxy allows to connect NRENs that are not MPLS enabled.
Difference between the GÉANT VPN services
The purpose of GÉANT plus, L3VPN and MD-VPN GÉANT service are to provide a private interconnection amongst common research and education network users (collaborating on a single research project).
These services as all services delivered by GÉANT will be not used by NRENs directly but delivered by the NRENs or the Regional Network (RN) to end-users. From the end-users point of view these services delivered are the same but from the NREN point of view these services are different in the way that GÉANT delivered them to the NREN and in the border of service. GÉANT plus and L3VPN deliver their service at the border of GÉANT whereas MD-VPN aims to provide the service at end user site (end-to-end service).