RFC 1633 (rfc1633) - Page 1 of 33
Integrated Services in the Internet Architecture: an Overview
Alternative Format: Original Text Document
Network Working Group R. Braden
Request for Comments: 1633 ISI
Category: Informational D. Clark
MIT
S. Shenker
Xerox PARC
June 1994
Integrated Services in the Internet Architecture: an Overview
Status of this Memo
This memo provides information for the Internet community. This memo
does not specify an Internet standard of any kind. Distribution of
this memo is unlimited.
Abstract
This memo discusses a proposed extension to the Internet architecture
and protocols to provide integrated services, i.e., to support real-
time as well as the current non-real-time service of IP. This
extension is necessary to meet the growing need for real-time service
for a variety of new applications, including teleconferencing, remote
seminars, telescience, and distributed simulation.
This memo represents the direct product of recent work by Dave Clark,
Scott Shenker, Lixia Zhang, Deborah Estrin, Sugih Jamin, John
Wroclawski, Shai Herzog, and Bob Braden, and indirectly draws upon
the work of many others.
Table of Contents
1. Introduction ...................................................2
2. Elements of the Architecture ...................................3
2.1 Integrated Services Model ..................................3
2.2 Reference Implementation Framework .........................6
3. Integrated Services Model ......................................11
3.1 Quality of Service Requirements ............................12
3.2 Resource-Sharing Requirements and Service Models ...........16
3.3 Packet Dropping ............................................18
3.4 Usage Feedback .............................................19
3.5 Reservation Model ..........................................19
4. Traffic Control Mechanisms .....................................20
4.1 Basic Functions ............................................20
4.2 Applying the Mechanisms ....................................23
4.3 An example .................................................24
5. Reservation Setup Protocol .....................................25
Braden, Clark & Shenker