NACK-Oriented Reliable Multicast (NORM) Transport Protocol
RFC 5740
Document | Type |
RFC - Proposed Standard
(November 2009; Errata)
Obsoletes RFC 3940
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Authors | Joseph Macker , Carsten Bormann , Mark Handley , Brian Adamson | ||
Last updated | 2021-01-22 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5740 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Magnus Westerlund | ||
Send notices to | (None) |
Network Working Group B. Adamson Request for Comments: 5740 Naval Research Laboratory Obsoletes: 3940 C. Bormann Category: Standards Track Universitaet Bremen TZI M. Handley University College London J. Macker Naval Research Laboratory November 2009 NACK-Oriented Reliable Multicast (NORM) Transport Protocol Abstract 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. 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. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. Adamson, et al. Standards Track [Page 1] RFC 5740 NORM Protocol November 2009 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction and Applicability . . . . . . . . . . . . . . . . 4 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 5 1.2. NORM Data Delivery Service Model . . . . . . . . . . . . . 5 1.3. NORM Scalability . . . . . . . . . . . . . . . . . . . . . 7 1.4. Environmental Requirements and Considerations . . . . . . 8 2. Architecture Definition . . . . . . . . . . . . . . . . . . . 8 2.1. Protocol Operation Overview . . . . . . . . . . . . . . . 10 2.2. Protocol Building Blocks . . . . . . . . . . . . . . . . . 12 2.3. Design Trade-Offs . . . . . . . . . . . . . . . . . . . . 12 3. Conformance Statement . . . . . . . . . . . . . . . . . . . . 13 4. Message Formats . . . . . . . . . . . . . . . . . . . . . . . 15 4.1. NORM Common Message Header and Extensions . . . . . . . . 15 4.2. Sender Messages . . . . . . . . . . . . . . . . . . . . . 18 4.2.1. NORM_DATA Message . . . . . . . . . . . . . . . . . . 18Show full document text