RFC 3539 (rfc3539) - Page 1 of 41

Authentication, Authorization and Accounting (AAA) Transport Profile

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Network Working Group                                           B. Aboba
Request for Comments: 3539                                     Microsoft
Category: Standards Track                                        J. Wood
                                                  Sun Microsystems, Inc.
                                                               June 2003


  Authentication, Authorization and Accounting (AAA) Transport Profile

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2003).  All Rights Reserved.

Abstract

   This document discusses transport issues that arise within protocols
   for Authentication, Authorization and Accounting (AAA).  It also
   provides recommendations on the use of transport by AAA protocols.
   This includes usage of standards-track RFCs as well as experimental
   proposals.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
       1.1.  Requirements Language. . . . . . . . . . . . . . . . . .  2
       1.2.  Terminology. . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Issues in Transport Usage. . . . . . . . . . . . . . . . . . .  5
       2.1.  Application-driven Versus Network-driven . . . . . . . .  5
       2.2.  Slow Failover. . . . . . . . . . . . . . . . . . . . . .  6
       2.3.  Use of Nagle Algorithm . . . . . . . . . . . . . . . . .  7
       2.4.  Multiple Connections . . . . . . . . . . . . . . . . . .  7
       2.5.  Duplicate Detection. . . . . . . . . . . . . . . . . . .  8
       2.6.  Invalidation of Transport Parameter Estimates. . . . . .  8
       2.7.  Inability to use Fast Re-Transmit. . . . . . . . . . . .  9
       2.8.  Congestion Avoidance . . . . . . . . . . . . . . . . . .  9
       2.9.  Delayed Acknowledgments. . . . . . . . . . . . . . . . . 11
       2.10. Premature Failover . . . . . . . . . . . . . . . . . . . 11
       2.11. Head of Line Blocking. . . . . . . . . . . . . . . . . . 11
       2.12. Connection Load Balancing. . . . . . . . . . . . . . . . 12




Aboba & Wood                Standards Track
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