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Requirements for Multicast Protocols (RFC1458)

IP.com Disclosure Number: IPCOM000002286D
Original Publication Date: 1993-May-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 16 page(s) / 45K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Braudes: AUTHOR [+2]

Abstract

Multicast protocols have been developed to support group communications. These protocols use a one-to-many paradigm for transmission, typically using class D Internet Protocol (IP) addresses to specify specific multicast groups. While designing network services for reliable transmission of very large imagery as part of the DARPA-sponsored ImNet program, we have reviewed existing multicast protocols and have determined that none meet all of the requirements of image communications [3]. This RFC reviews the current state of multicast protocols, highlights the missing features, and motivates the design and development of an enhanced multicast protocol.

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Network Working Group R. Braudes

Request for Comments: 1458 S. Zabele

TASC

May 1993

Requirements for Multicast Protocols

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard. Distribution of this memo is

unlimited.

Summary

Multicast protocols have been developed over the past several years

to address issues of group communication. Experience has

demonstrated that current protocols do not address all of the

requirements of multicast applications. This memo discusses some of

these unresolved issues, and provides a high-level design for a new

multicast transport protocol, group address and membership authority,

and modifications to existing routing protocols.

Table of Contents

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 2

2. The Image Communication Problem . . . . . . . . . . . . . 2

2.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2.2 Requirements . . . . . . . . . . . . . . . . . . . . . . . 3

3. Review of Existing Multicast Protocols . . . . . . . . . . 4

3.1 IP/Multicast . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 XTP . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3 ST-II . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.4 MTP . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . 8

4. Reliable Adaptive Multicast Service . . . . . . . . . . . 9

4.1 The Multicast Group Authority . . . . . . . . . . . . . . 9

4.1.1 Address Management . . . . . . . . . . . . . . . . . . . . 9

4.1.2 Service Registration, Requests, Release, and Group

Membership Maintenance . . . . . . . . . . . . . . . . . . 10

4.2 The Reliable Adaptive Multicast Protocol (RAMP) . . . . . 11

4.2.1 Quality of Service Levels . . . . . . . . . . . . . . . . 12

4.2.2 Error Recovery . . . . . . . . . . . . . . . . . . . . . . 12

4.2.3 Flow Control . . . . . . . . . . . . . . . . . . . . . . . 13

4.3 Routing Support . . . . . . . . . . . . . . . . . . . . . 14

4.3.1 Path Set-up . . . . . . . . . . . . . . . . . . . . . . . 14

4.3.2 Path Tear-down . . . . . . . . . . . . . . . . . . . . . . 15

4.3.3 Multicast Routing Based on Quality of Service . . . . . . 15

4.3.4 Quality of Service Based Packet L...