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Support for Multicast over UNI 3.0/3.1 based ATM Networks (RFC2022)

IP.com Disclosure Number: IPCOM000002576D
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2019-Feb-16

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Armitage: AUTHOR

Related Documents

10.17487/RFC2022: DOI

Abstract

This memo describes a mechanism to support the multicast needs of Layer 3 protocols in general, and describes its application to IP multicasting in particular. [STANDARDS-TRACK]

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 2% of the total text.

Network Working Group G. Armitage Request for Comments: 2022 Bellcore Category: Standards Track November 1996

Support for Multicast over UNI 3.0/3.1 based ATM Networks.

Status of this Memo

This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited

Abstract

Mapping the connectionless IP multicast service over the connection oriented ATM services provided by UNI 3.0/3.1 is a non-trivial task. This memo describes a mechanism to support the multicast needs of Layer 3 protocols in general, and describes its application to IP multicasting in particular.

ATM based IP hosts and routers use a Multicast Address Resolution Server (MARS) to support RFC 1112 style Level 2 IP multicast over the ATM Forum’s UNI 3.0/3.1 point to multipoint connection service. Clusters of endpoints share a MARS and use it to track and disseminate information identifying the nodes listed as receivers for given multicast groups. This allows endpoints to establish and manage point to multipoint VCs when transmitting to the group.

The MARS behaviour allows Layer 3 multicasting to be supported using either meshes of VCs or ATM level multicast servers. This choice may be made on a per-group basis, and is transparent to the endpoints.

Armitage Standards Track [Page 1]

RFC 2022 Multicast over UNI 3.0/3.1 based ATM November 1996

Table of Contents

1. Introduction................................................. 4 1.1 The Multicast Address Resolution Server (MARS)............. 5 1.2 The ATM level multicast Cluster............................ 5 1.3 Document overview.......................................... 6 1.4 Conventions................................................ 7 2. The IP multicast service model............................... 7 3. UNI 3.0/3.1 support for intra-cluster multicasting........... 8 3.1 VC meshes.................................................. 9 3.2 Multicast Servers.......................................... 9 3.3 Tradeoffs.................................................. 10 3.4 Interaction with local UNI 3.0/3.1 signalling entity....... 11 4. Overview of the MARS......................................... 12 4.1 Architecture............................................... 12 4.2 Control message format..................................... 12 4.3 Fixed header fields in MARS control messages............... 13 4.3.1 Hardware type.......................................... 14 4.3.2 Protocol type.......................................... 14 4.3.3 Checksum............................................... 15 4.3.4 Extensions Offset...................................... 15 4.3.5 Operation code......................................... 16 4.3.6 Reserved............................................... 16 5. E...

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