RFC 1821 (rfc1821) - Page 1 of 24
Integration of Real-time Services in an IP-ATM Network Architecture
Alternative Format: Original Text Document
Network Working Group M. Borden
Request for Comments: 1821 E. Crawley
Category: Informational Bay Networks
B. Davie
Bellcore
S. Batsell
NRL
August 1995
Integration of Real-time Services in an IP-ATM Network Architecture
Status of the 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
The IETF is currently developing an integrated service model which is
designed to support real-time services on the Internet.
Concurrently, the ATM Forum is developing Asynchronous Transfer Mode
networking which similarly provides real-time networking support. The
use of ATM in the Internet as a link layer protocol is already
occurring, and both the IETF and the ATM Forum are producing
specifications for IP over ATM. The purpose of this paper is to
provide a clear statement of what issues need to be addressed in
interfacing the IP integrated services environment with an ATM
service environment so as to create a seamless interface between the
two in support of end users desiring real-time networking services.
Table of Contents
1.0 Introduction 2
2.0 Problem Space Overview 3
2.1 Initial Assumptions 3
2.2 Topologies Under Consideration 4
2.3 Providing QoS in IP over ATM - a walk-though 5
3.0 Service Model Issues 6
3.1 Traffic Characterization 7
3.2 QoS Characterization 8
4.0 Resource Reservation Styles 10
4.1 RSVP 10
4.2 ST-II 13
4.3 Mapping IP flows to ATM Connections 15
5.0 End System Issues 16
6.0 Routing Issues 16
Borden, et al Informational