Abstract: A control method is provided for controlling a load state of a physical link between two physical network nodes in a physical network. A physical link carries a plurality of virtual links, and a virtual link connects together two virtual nodes belonging to a virtual network. First and second metrics are associated with the virtual link. The control method includes the following steps implemented by one of the two physical network nodes: a step of detecting a load state of a physical link; a step of identifying a virtual link for which a present metric is the first metric; and a step of sending a command to the virtual node carried by the physical node and to which the identified virtual link is connected, the command requesting a modification of the present metric from the first metric to the second metric for the virtual link.

Abstract: A transmission system including a plurality of edge routers. The system manages a plurality of virtual networks, each network linking a plurality of remote networks therebetween. An edge router manages a topology table that indicates one or more adjacent edge routers for a given virtual network and at least one remote network identifier for an adjacent edge router. A route change made in relation to a remote network of a given virtual network is detected on the edge router. On the basis of the topology table, one or more adjacent edge routers and the corresponding remote network identifiers are determined for the virtual network. The route change is transmitted to said adjacent edge routers by indicating the corresponding remote network identifiers.

Abstract: A transmission system including a plurality of edge routers. The system manages a plurality of virtual networks, each network linking a plurality of remote networks therebetween. An edge router manages a topology table that indicates one or more adjacent edge routers for a given virtual network and at least one remote network identifier for an adjacent edge router. A route change made in relation to a remote network of a given virtual network is detected on the edge router. On the basis of the topology table, one or more adjacent edge routers and the corresponding remote network identifiers are determined for the virtual network. The route change is transmitted to said adjacent edge routers by indicating the corresponding remote network identifiers.

Abstract: A control method is provided for controlling a load state of a physical link between two physical network nodes in a physical network. A physical link carries a plurality of virtual links, and a virtual link connects together two virtual nodes belonging to a virtual network. First and second metrics are associated with the virtual link. The control method includes the following steps implemented by one of the two physical network nodes: a step of detecting a load state of a physical link; a step of identifying a virtual link for which a present metric is the first metric; and a step of sending a command to the virtual node carried by the physical node and to which the identified virtual link is connected, the command requesting a modification of the present metric from the first metric to the second metric for the virtual link.