RFC 2022 (rfc2022) - Page 1 of 82
Support for Multicast over UNI 3
Alternative Format: Original Text Document
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