Abstract: There is described a method for automatically mapping network configurations to enable at least two elements belonging to a first layer network to communicate with each other over a second layer network, comprising: a) determining, by a second layer element a change in the first network, b) propagating through one or more third interfaces towards the rest of second layer elements over the second layer network: routing information associated with the first configuration; and a loopback address information identifying said second layer element, c) adapting the second configuration by managing connections between said second layer element and one or more of the remaining second layer elements based on the propagated information. There is also described a system adapted to implement the steps of a method according to the invention.