Abstract: A method for determination of topology of virtual networks comprises the following steps implemented by a physical node, physical nodes being connected by a physical network and designed to support virtual nodes of these virtual networks: determination of resource parameters defining a physical configuration of the physical network and a physical configuration specific to the physical node and determination of request parameters defining service requests relating to the virtual networks. The method further comprises, in the case of modification of at least one parameter belonging to the group comprising the resource parameters and the request parameters between a current point in time and a preceding point in time, the broadcast of at least the modified parameters within the physical network, the updating of the resource and request parameters as a function of the modified parameters and the determination of topologies for the virtual networks by means of the updated parameters.