rfc2881.txt

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RFC 2881                    NASreq NAS Model                   July 2000


11. References

   [1]  Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote
        Authentication Dial In User Service (RADIUS)", RFC 2865, June
        2000.

   [2]  Rigney, C., "RADIUS Accounting", RFC 2866, June 2000.

   [3]  Calhoun, P., "Diameter Base Protocol", Work in Progress.

   [4]  Zorn, G., "Yet Another Authentication Protocol (YAAP)", Work in
        Progress.

   [5]  Mamakos, L., Lidl, K., Evarts, K., Carrel, D., Simone, D. and R.
        Wheeler, "A Method for Transmitting PPP Over Ethernet (PPPoE)",
        RFC 2516, February 1999.

   [6]  Valencia, A., Littlewood, M. and T. Kolar, "Cisco Layer Two
        Forwarding (Protocol) L2F", RFC 2341, May 1998.

   [7]  Hamzeh, K., "Ascend Tunnel Management Protocol - ATMP", RFC
        2107, February 1997.

   [8]  Valencia, A., Townsley, W., Rubens, A., Pall, G., Zorn, G., and
        B. Palter, "Layer Two Tunneling Protocol (L2TP)", RFC 2661,
        August 1999.

   [9]  Zorn, G., Leifer, D., Rubens, A., Shriver, J. and M. Holdrege,
        "RADIUS Attributes for Tunnel Protocol Support", RFC 2868, June
        2000.

   [10] Zorn, G., Aboba, B. and D. Mitton, "RADIUS Accounting
        Modifications for Tunnel Protocol Support", RFC 2867, June 2000.

   [11] Aboba, B. and G. Zorn, "Implementation of PPTP/L2TP Compulsory
        Tunneling via RADIUS", RFC 2809, April 2000.

   [12] Simpson, W., "PPP Challenge Handshake Authentication Protocol
        (CHAP)", RFC 1994, August 1996.

   [13] Zorn, G. and S. Cobb, "Microsoft PPP CHAP Extensions", RFC 2433,
        March 1998.

   [14] Blunk, L. and J. Vollbrecht, "PPP Extensible Authentication
        Protocol (EAP)", RFC 2284, March 1998.

   [15] Calhoun, et al., "Extensible Authentication Protocol Support in
        RADIUS", Work in Progress.



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RFC 2881                    NASreq NAS Model                   July 2000


   [16] Aboba, B. and M. Beadles, "The Network Access Identifier", RFC
        2486, January 1999.

   [17] Braden, R., Zhang, L., Berson, S., Herzog, S. and S. Jamin,
        "Resource ReSerVation Protocol (RSVP) Version 1 Functional
        Specification", RFC 2205, September 1997.

   [18] Simpson, W., Editor, "The Point-to-Point Protocol (PPP)", STD
        51, RFC 1661, July 1994.

   [19] Boyle, J., Cohen, R., Durham, D., Herzog, S., Raja, R. and A.
        Sastry. "The COPS (Common Open Policy Service) Protocol", RFC
        2748, January 2000.

   [20] Case, J., Fedor, M., Schoffstall, M. and J. Davin. "A Simple
        Network Management Protocol (SNMP)", STD 15, RFC 1157, May 1990.

   [21] Atkinson, R. and S. Kent, "Security Architecture for the
        Internet Protocol", RFC 2401, November 1998.

   [22] Aboba, Zorn, "Dialup Roaming Requirements", Work in Progress.

12. Acknowledgments

   This document is a synthesis of my earlier draft and Mark Beadles'
   NAS Reference Model draft.

13. Authors' Addresses

   David Mitton
   Nortel Networks
   880 Technology Park Drive
   Billerica, MA 01821

   Phone: [phone]
   EMail: [e-mail]


   Mark Beadles
   SmartPipes Inc.
   545 Metro Place South
   Suite 100
   Dublin, OH 43017

   Phone: [phone]
   EMail: [e-mail]





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RFC 2881                    NASreq NAS Model                   July 2000


14. Appendix - Acronyms and Glossary:

   AAA - Authentication, Authorization, Accounting, The three primary
   services required by a NAS server or protocol.

   NAS - Network Access Server, a system that provides access to a
   network.  In some cases also know as a RAS, Remote Access Server.

   CLI - Command Line Interface, an interface to a command line service
   for use with an common asynchronous terminal facility.

   SLIP - Serial Line Internet Protocol, an IP-only serial datalink,
   predecessor to PPP.

   PPP - Point-to-Point Protocol; a serial datalink level protocol that
   supports IP as well as other network protocols. PPP has three major
   states of operation: LCP - Link layer Control Protocol,
   Authentication, of which there are several types (PAP, CHAP, EAP),
   and NCP - Network layer Control Protocol, which negotiates the
   network layer parameters for each of the protocols in use.

   IPX - Novell's NetWare transport protocol

   NETBEUI - A Microsoft/IBM LAN protocol used by Microsoft file
   services and the NETBIOS applications programming interface.

   ARAP - AppleTalk Remote Access Protocol

   LAT - Local Area Transport; a Digital Equipment Corp. LAN protocol
   for terminal services.

   PPPoe - PPP over Ethernet; a protocol that forwards PPP frames on an
   LAN infrastructure.  Often used to aggregate PPP streams at a common
   server bank.

   VPN - Virtual Private Network; a term for networks that appear to be
   private to the user by the use of tunneling techniques.

   FR - Frame Relay, a synchronous WAN protocol and telephone network
   intraconnect service.

   PSVC - Permanent Switched Virtual Circuit - a service which delivers
   an virtual permanent circuit by a switched network.

   PSTN - Public Switched Telephone Network






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   ISDN - Integrated Services Digital Network, a telephone network
   facility for transmitting digital and analog information over a
   digital network connection.  A NAS may have the ability to receive
   the information from the telephone network in digital form.

   ISP - Internet Service Provider; a provider of Internet access (also
   Network Service Provider, NSP).

   BRI - Basic Rate Interface; a digital telephone interface.

   PRI - Primary Rate Interface; a digital telephone interface of 64K
   bits per second.

   T1 - A digital telephone interface which provides 24-36 channels of
   PRI data and one control channel (2.048 Mbps).

   T3 - A digital telephone interface which provides 28 T1 services.
   Signalling control for the entire connection is provided on a
   dedicated in-band channel.

   NFAS - Non-Facility Associated Signaling, a telephone network
   protocol/service for providing call information on a separate wire
   connection from the call itself.  Used with multiple T1 or T3
   connections.

   SS7 - A telephone network protocol for communicating call supervision
   information on a separate data network from the voice network.

   POP - Point Of Presence; a geographic location of equipment and
   interconnection to the network.  An ISP typically manages all
   equipment in a single POP in a similar manner.

   VSA - Vendor Specific Attributes; RADIUS attributes defined by
   vendors using the provision of attribute 26.

















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RFC 2881                    NASreq NAS Model                   July 2000


15.  Full Copyright Statement

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

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
   BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
   HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.



















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