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This document describes the messages and procedures of the Negative-acknowledgment
(NACK) Oriented Reliable Multicast (NORM) protocol. This protocol is designed to provide end-to-end reliable
transport of bulk data objects or streams over generic IP multicast routing and forwarding
services. NORM uses a selective, negative acknowledgment mechanism for transport reliability and offers additional
protocol mechanisms to allow for operation with minimal "a priori" coordination among senders and
receivers. A congestion control scheme is specified to allow the NORM protocol to fairly
share available network bandwidth with other transport protocols such as Transmission Control Protocol (TCP).
It is capable of operating with both reciprocal multicast routing among senders and receivers
and with asymmetric connectivity (possibly a unicast return path) between the senders and receivers.
The protocol offers a number of features to allow different types of applications or
possibly other higher level transport protocols to utilize its service in different ways. The
protocol leverages the use of FEC-based repair and other IETF reliable multicast transport
(RMT) building blocks in its design. This memo defines an Experimental Protocol
for the Internet community.
Carsten Bormann <firstname.lastname@example.org>
Joseph Macker <email@example.com>
Brian Adamson <firstname.lastname@example.org>
Mark Handley <email@example.com>
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid)