This document describes the Diameter protocol application used for
Authentication, Authorization, and Accounting (AAA) services in the
Network Access Server (NAS) environment. When combined with the
Diameter Base protocol, Transport Profile, and Extensible
Authentication Protocol specifications, this application specification
satisfies typical network access services requirements. Initial
deployments of the Diameter protocol are expected to include legacy
systems. Therefore, this application has been carefully designed to
ease the burden of protocol conversion between RADIUS and Diameter.
This is achieved by including the RADIUS attribute space to eliminate
the need to perform many attribute translations. The interactions
between Diameter applications and RADIUS specified in this document
are to be applied to all Diameter applications. In this sense, this
document extends the Base Diameter protocol. [STANDARDS-TRACK]