A telecommunications system in a DiffServ aware Traffic Engineering (DS-TE) environment includes a plurality of source nodes from which LSPs arise. The system includes an MPLS network having DS-TE compliant routers and links with available bandwidth between the routers. The links having equal cost paths. Each router adding an LSP to a link as a function of available bandwidth. The plurality of source nodes in communication with the network. The MPLS network using a DS-TE bandwidth constraint model. The system includes a plurality of destination nodes in communication with the network which receives LSPs. A method for LSP path selection in a DiffServ aware Traffic Engineering environment.