The method of transferring data between a first and a second set of elements via a switch that includes a set of paths each associated with a weighting coefficient representing a data stream for each path. The method includes a credit flow control between the first set of elements and the switch and a credit flow control between the switch and the second set of elements. An available credit coefficient is computed for each element of the first set on the basis of a credit allocated by each element of the second set and of the weighting coefficient of each path.