Method of routing virtual links in a frame-switching network with guaranteed determinism

A method for routing virtual links in a frame switching network including a plurality of source terminals and/or destination of the frames, frame switches being connected together through physical connections, each virtual link being defined, for a point-to-point type, by a path through the network between a source terminal and a destination terminal and, for a multipoint type, by a plurality of paths through the network between a source terminal and a plurality of destination terminals. The method carries out routing of the links while observing a segregation constraint with regard to triplets of consecutive switches belonging to the oriented loops, so as to allow verification of determinism of the network.