A Framework for Integrated Services Operation over Diffserv Networks
RFC 2998

Document Type RFC - Informational (November 2000; No errata)
Last updated 2013-03-02
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Network Working Group                                           Y. Bernet
Request for Comments: 2998                                        P. Ford
Category: Informational                                         Microsoft
                                                              R. Yavatkar
                                                                    Intel
                                                                 F. Baker
                                                                    Cisco
                                                                 L. Zhang
                                                                     UCLA
                                                                 M. Speer
                                                         Sun Microsystems
                                                                R. Braden
                                                                      ISI
                                                                 B. Davie
                                                                    Cisco
                                                            J. Wroclawski
                                                                  MIT LCS
                                                             E. Felstaine
                                                                   SANRAD
                                                            November 2000

  A Framework for Integrated Services Operation over Diffserv Networks

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

   The Integrated Services (Intserv) architecture provides a means for
   the delivery of end-to-end Quality of Service (QoS) to applications
   over heterogeneous networks.  To support this end-to-end model, the
   Intserv architecture must be supported over a wide variety of
   different types of network elements.  In this context, a network that
   supports Differentiated Services (Diffserv) may be viewed as a
   network element in the total end-to-end path.  This document
   describes a framework by which Integrated Services may be supported
   over Diffserv networks.

Bernet, et al.               Informational                      [Page 1]
RFC 2998       Integrated Services Over Diffserv Networks  November 2000

Table of Contents

   1. Introduction .................................................  3
   1.1 Integrated Services Architecture ............................  3
   1.2 RSVP ........................................................  3
   1.3 Diffserv ....................................................  4
   1.4 Roles of Intserv, RSVP and Diffserv .........................  4
   1.5 Components of Intserv, RSVP and Diffserv ....................  5
   1.6 The Framework ...............................................  6
   1.7 Contents ....................................................  6
   2. Benefits of Using Intserv with Diffserv ......................  7
   2.1 Resource Based Admission Control ............................  7
   2.2 Policy Based Admission Control ..............................  8
   2.3 Assistance in Traffic Identification/Classification .........  8
   2.3.1 Host Marking ..............................................  9
   2.3.2 Router Marking ............................................  9
   2.4 Traffic Conditioning ........................................ 10
   3. The Framework ................................................ 10
   3.1 Reference Network ........................................... 11
   3.1.1 Hosts ..................................................... 11
   3.1.2 End-to-End RSVP Signaling ................................. 12
   3.1.3 Edge Routers .............................................. 12
   3.1.4 Border Routers ............................................ 12
   3.1.5 Diffserv Network Region ................................... 13
   3.1.6 Non-Diffserv Network Regions .............................. 13
   3.2 Service Mapping ............................................. 13
   3.2.1 Default Mapping ........................................... 14
   3.2.2 Network Driven Mapping .................................... 14
   3.2.3 Microflow Separation ...................................... 14
   3.3 Resource Management in Diffserv Regions ..................... 15
   4. Detailed Examples of the Operation of
      Intserv over Diffserv Regions ................................ 16
   4.1 Statically Provisioned Diffserv Network Region .............. 16
   4.1.1 Sequence of Events in Obtaining End-to-end QoS ............ 16
   4.2 RSVP-Aware Diffserv Network Region .......................... 18
   4.2.1 Aggregated or Tunneled RSVP ............................... 19
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