This appendix describes the formats for RADIUS attributes defined by 3GPP2 and standardized in [IS835]. The generalized format shared by all RADIUS attributes is shown in Figure B.1.

Figure B.1: 3GPP2 RADIUS attribute format. Reproduced under written permission from Telecommunications Industry Association.

Currently 3GPP2 RADIUS attributes implemented by major vendors include the following:

• Accounting container

• DiffServ option

• IKE attributes such as pre-shared secret, pre-shared secret request, and KeyID

• HA attribute

• Security level

• Reverse tunnel specification