A method and system provides quality of service in a DSL network interfaced with the Internet. A connection engine determines whether a connection from an internet endpoint has an associated IP layer 3 quality of service or ATM layer 2 quality of service and provides the internet network quality of service parameters to a mapping engine. The mapping engine references a quality of service map to associate the layer 3 or layer 2 quality of service with a DSL layer 1 quality of service. The mapping engine provides the DSL quality of service parameters to the DSL network which establishes the DSL connection between a DSL endpoint and the internet endpoint with the appropriate quality of service. To provision services to a DSL network, the quality of service map is updated to associate quality of service parameters for the service, including its association with other network quality of service parameters.