2.9 RADIUS Signaling Router

The RADIUS Signaling Router feature of the DSR covers RADIUS message routing (RADIUS message in and RADIUS message out) without Diameter interworking. RSR supports RADIUS over UDP transport. RADIUS signaling is handled by a DA-MP instance. Both Diameter and RADIUS connections can be hosted on a DA-MP. Some examples where RSR may be used are:

• WLAN authentication and authorization, both in non-roaming and roaming cases.
• For a GGSN to authenticate a user and provide (accounting) information to an AAA server on a per APN basis.
• Policy control in broadband networks via dynamic authorization mechanisms.

Base RADIUS support on the DSR, aka RSR, is provided in a way that the system may or may not also be handling Diameter traffic. On a DSR with RSR, a message could come in as either RADIUS or Diameter and egress in the same protocol as it ingressed.