1. A telecommunications system in a DiffServ aware Traffic Engineering (DS-TE) environment comprising: a plurality of source nodes from which LSPs (label switched paths) arise; an MPLS network having DS-TE compliant routers and links with available bandwidth between the routers, the links having equal cost paths, the DS-TE compliant routers advertising maximum reservable bandwidth for the links, the bandwidth constraint model, and an overbooking factor and unreserved bandwidth for each traffic engineering (TE) class, each router adding an LSP to a link as a function of available bandwidth; the maximum reservable bandwidth for the links, the bandwidth constraint model, the overbooking factor and the unreserved bandwidth for each TE class used as tie breaker criteria to choose a link from multiple links having equal cost paths, the plurality of source nodes in communication with the network, the MPLS network using a DS-TE bandwidth constraint model; and a plurality of destination nodes in communication with the network which receives said LSPs.