Provisioning of L2VPN services in IPoWDM networks

The advancement of hyperscale cloud services is fostering the large adoption of IP over Dense Wavelength Division Multiplexing (IPoWDM) and driving the re-design of optical network architecture. This paper presents the evolution of the control plane solutions for the IPoWDM nodes with pointto-point architecture. More specifically, the IP SDN Controller is the only control plane instance in charge of fully controlling modern IPoWDM nodes, including both packet layer and optical transmission parameters of the pluggable modules. The ETSI TeraFlow framework has been extended to support the novel IPoWDM devices by exploiting NETCONF protocol and OpenConfig YANG models. The IPoWDM devices have been equipped with a NETCONF agent to enable the control plane communication towards the SDN Controller and to perform the physical resources configuration through CMIS/Sonic APIs. The new control plane solutions have been experimentally validated in a testbed encompassing two IPoWDM boxes for the complete deployment of a L2VPN service. The overall data plane ready configuration time, including optical tuning (frequency and TX power configuration) and IP configuration, requires around 110s, with around 50s needed only by the optical tuning of the coherent pluggable modules.