RFC 5740: NACK-Oriented Reliable Multicast (NORM) Transport Protocol

In plain English — editorial summary, not part of the RFC

This document describes the messages and procedures of the Negative- ACKnowledgment (NACK) Oriented Reliable Multicast (NORM) protocol. This protocol can 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 (forward error correction) repair and other IETF Reliable Multicast Transport (RMT) building blocks in its design. This document obsoletes RFC 3940. [STANDARDS-TRACK]

Document record

Document ID

RFC5740

Published

November 2009

Authors

B. Adamson; C. Bormann; M. Handley; J. Macker

Status

PROPOSED STANDARD

Stream

IETF

Area

tsv

Pages

96

Also known as

—

Obsoletes:

RFC 3940

• Read the full RFC text →
• Plain text version
• IETF Datatracker history
• DOI: 10.17487/RFC5740
• Reported errata exist →

Topics

• multicast
• reliable multicast
• transport
• negative-acknowledgment
• forward error correction
• packet erasure coding
• group communication

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Also filed under

• PROPOSED STANDARD
• 2009
• IETF stream
• tsv area