the GEYSERS NCP+ architecture that extends standard ASON/GMPLS and PCE solutions to operate over a virtual optical network infrastructure and offer on-demand provisioning of enhanced network transport services between virtual IT resources connected to the network edges. In the proposed architecture, some of the functionalities traditionally provided by the SML, like the selection of the IT end-points, are moved to the NCP+ side, allowing global optimization of the utilization of network and IT resources and of energy consumption.