RFC 3754 (rfc3754) - Page 1 of 34
IP Multicast in Differentiated Services (DS) Networks
Alternative Format: Original Text Document
Network Working Group R. Bless
Request for Comments: 3754 Univ. of Karlsruhe
Category: Informational K. Wehrle
Univ. of Tuebingen
April 2004
IP Multicast in Differentiated Services (DS) 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 (2004). All Rights Reserved.
Abstract
This document discusses the problems of IP Multicast use in
Differentiated Services (DS) networks, expanding on the discussion in
RFC 2475 ("An Architecture of Differentiated Services"). It also
suggests possible solutions to these problems, describes a potential
implementation model, and presents simulation results.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Management of Differentiated Services. . . . . . . . . . 2
2. Problems of IP Multicast in DS Domains . . . . . . . . . . . . 3
2.1. Neglected Reservation Subtree Problem (NRS Problem). . . 4
2.2. Heterogeneous Multicast Groups . . . . . . . . . . . . . 12
2.3. Dynamics of Any-Source Multicast . . . . . . . . . . . . 13
3. Solutions for Enabling IP-Multicast in Differentiated
Services Networks. . . . . . . . . . . . . . . . . . . . . . . 13
3.1. Solution for the NRS Problem . . . . . . . . . . . . . . 13
3.2. Solution for Supporting Heterogeneous Multicast Groups . 15
3.3. Solution for Any-Source Multicast. . . . . . . . . . . . 16
4. Scalability Considerations . . . . . . . . . . . . . . . . . . 16
5. Deployment Considerations. . . . . . . . . . . . . . . . . . . 17
6. Security Considerations. . . . . . . . . . . . . . . . . . . . 18
7. Implementation Model Example . . . . . . . . . . . . . . . . . 18
8. Proof of the Neglected Reservation Subtree Problem . . . . . . 19
8.1. Implementation of the Proposed Solution. . . . . . . . . 20
8.2. Test Environment and Execution . . . . . . . . . . . . . 21
9. Simulative Study of the NRS Problem and Limited Effort PHB . . 23
Bless & Wehrle Informational