RFC 2867 (rfc2867) - Page 1 of 11

RADIUS Accounting Modifications for Tunnel Protocol Support

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Network Working Group                                            G. Zorn
Request for Comments: 2867                           Cisco Systems, Inc.
Category: Informational                                         B. Aboba
Updates: 2866                                      Microsoft Corporation
                                                               D. Mitton
                                                         Nortel Networks
                                                               June 2000


      RADIUS Accounting Modifications for Tunnel Protocol Support

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

Abstract

   This document defines new RADIUS accounting Attributes and new values
   for the existing Acct-Status-Type Attribute [1] designed to support
   the provision of compulsory tunneling in dial-up networks.

Specification of Requirements

   In this document, the key words "MAY", "MUST, "MUST NOT", "optional",
   "recommended", "SHOULD", and "SHOULD NOT", are to be interpreted as
   described in [2].

1.  Introduction

   Many applications of tunneling protocols such as PPTP [5] and L2TP
   [4] involve dial-up network access.  Some, such as the provision of
   secure access to corporate intranets via the Internet, are
   characterized by voluntary tunneling: the tunnel is created at the
   request of the user for a specific purpose.  Other applications
   involve compulsory tunneling: the tunnel is created without any
   action from the user and without allowing the user any choice in the
   matter, as a service of the Internet service provider (ISP).
   Typically, ISPs providing a service want to collect data regarding
   that service for billing, network planning, etc.  One way to collect
   usage data in dial-up networks is by means of RADIUS  Accounting [1].
   The use of RADIUS Accounting allows dial-up usage data to be
   collected at a central location, rather than stored on each NAS.



Zorn, et al.                 Informational
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