A Framework for Integrated Services Operation over Diffserv Networks
RFC 2998
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RFC - Informational
(November 2000; No errata)
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Last updated |
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2013-03-02
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IETF
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plain text
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(None)
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No shepherd assigned
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IESG state |
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RFC 2998 (Informational)
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Consensus Boilerplate |
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Unknown
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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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