RFC 3248 (rfc3248) - Page 1 of 11


A Delay Bound alternative revision of RFC 2598



Alternative Format: Original Text Document



Network Working Group                                        G. Armitage
Request for Comments: 3248            Swinburne University of Technology
Category: Informational                                     B. Carpenter
                                                                    IBM
                                                               A. Casati
                                                     Lucent Technologies
                                                            J. Crowcroft
                                                 University of Cambridge
                                                              J. Halpern
                                                              Consultant
                                                                B. Kumar
                                                    Corona Networks Inc.
                                                           J. Schnizlein
                                                           Cisco Systems
                                                              March 2002


             A Delay Bound alternative revision of RFC 2598

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 (2001).  All Rights Reserved.

Abstract

   For historical interest, this document captures the EF Design Team's
   proposed solution, preferred by the original authors of RFC 2598 but
   not adopted by the working group in December 2000.  The original
   definition of EF was based on comparison of forwarding on an unloaded
   network.  This experimental Delay Bound (DB) PHB requires a bound on
   the delay of packets due to other traffic in the network.  At the
   Pittsburgh IETF meeting in August 2000, the Differentiated Services
   working group faced serious questions regarding RFC 2598 - the
   group's standards track definition of the Expedited Forwarding (EF)
   Per Hop Behavior (PHB).  An 'EF Design Team' volunteered to develop a
   re-expression of RFC 2598, bearing in mind the issues raised in the
   DiffServ group.  At the San Diego IETF meeting in December 2000 the
   DiffServ working group decided to pursue an alternative re-expression
   of the EF PHB.






Armitage, et al.             Informational