MPLS has the potential to consolidate service provider networks and services over a single common network core infrastructure. Different services and technologies such as ATM, frame relay, circuit emulation and IP can be supported over MPLS networks. DSS 2 may be used for setting up and controlling ATM connections between two ATM/MPLS network nodes attached to an MPLS network. Extensions to DSS 2 information elements and procedures are defined to allow the exchange of MPLS LSP labels and other parameters specific to support ATM services over MPLS networks.