The network infrastructure within the Access and Aggregation domains of provider networks are subject to significant changes, both in technology as well as in their business model. Recently, a number of research initiatives, most notably MUSE and PlaNetS, have promoted the development of a unified broadband access and aggregation network platform. It is based on Ethernet and features various access technologies such as DSL, WiMAX, etc. End-to-end-communication is based on IPv6, and the communication procedures within the Ethernet domain ensures, that QoS is provided and maintained for the IP-layer. Important functions to ensure the IPv6-communication with the necessary QoS-properties are implemented autonomously, e.g. the extended IEEE 802. IX AAA and the resource admission and control functions (RACF).