Field Trial of Programmable L3 VPN Service Deployment Using SDN-Based Multi-domain Service Provisioning over IP/Optical Networks. - Barguil, Samier; López, Víctor; Manta-Caro, Cristyan; Lopez-de-Lerma, Arturo Mayoral; Dios, Óscar González de; Echeverry, Edward; Fernández-Palacios, Juan Pedro; Karvonen, Janne; Kemppainen, Jutta; Maya, Natalia; Vilalta, Ricard (IEEE Netw., 2021)