Huawei USA Huawei USA Nokia Siemens Networks Cisco Nokia Siemens Networks This document defines new attributes to facilitate Proxy Mobile IPv6 operations using RADIUS infrastructure. The RADIUS interactions take place when the Mobile Node attaches, authenticates and authorizes to a Proxy Mobile IPv6 domain. Furthermore, this document also defines a RADIUS based interface between the Local Mobility Anchor and the RADIUS server for authorizing received initial Proxy Binding Update messages for the mobility service session. In addition to the mobility session setup related RADIUS interaction, this document defines the baseline for both the Mobile Access Gateway and the Local Mobility Anchor generated accounting.