A method performed by a network controller for a mobile transport network. The method includes: obtaining traffic information for a plurality of demands for connectivity from client nodes through the mobile transport network, the traffic information for each demand identifying a client node for the demand, an egress node for the demand and an amount of traffic for the demand; calculating, for each demand, one or more paths from the client node, via an ingress node, to the egress node through the mobile transport network; mapping each path for a demand to a source port in the ingress node for the demand; providing the mapping to the ingress nodes to enable routing of traffic pertaining to the demands via the paths, based on the source port; and providing the source ports to the client nodes for inclusion in traffic pertaining to the demands.