Deterministic Networking (DetNet) Data Plane Framework
RFC 8938
Document | Type | RFC - Informational (November 2020; No errata) | |
---|---|---|---|
Authors | Balazs Varga , János Farkas , Lou Berger , Andy Malis , Stewart Bryant | ||
Last updated | 2020-11-30 | ||
Replaces | draft-ietf-detnet-dp-sol-mpls, draft-ietf-detnet-dp-sol-ip | ||
Stream | IETF | ||
Formats | plain text html xml pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Ethan Grossman | ||
Shepherd write-up | Show (last changed 2019-12-04) | ||
IESG | IESG state | RFC 8938 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Deborah Brungard | ||
Send notices to | Ethan Grossman <eagros@dolby.com> | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) B. Varga, Ed. Request for Comments: 8938 J. Farkas Category: Informational Ericsson ISSN: 2070-1721 L. Berger LabN Consulting, L.L.C. A. Malis Malis Consulting S. Bryant Futurewei Technologies November 2020 Deterministic Networking (DetNet) Data Plane Framework Abstract This document provides an overall framework for the Deterministic Networking (DetNet) data plane. It covers concepts and considerations that are generally common to any DetNet data plane specification. It describes related Controller Plane considerations as well. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are candidates for any level of Internet Standard; see Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at https://www.rfc-editor.org/info/rfc8938. Copyright Notice Copyright (c) 2020 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://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 Simplified BSD License. Table of Contents 1. Introduction 2. Terminology 2.1. Terms Used in This Document 2.2. Abbreviations 3. Overview of the DetNet Data Plane 3.1. Data Plane Characteristics 3.1.1. Data Plane Technology 3.1.2. Encapsulation 3.2. DetNet-Specific Metadata 3.3. DetNet IP Data Plane 3.4. DetNet MPLS Data Plane 3.5. Further DetNet Data Plane Considerations 3.5.1. Functions Provided on a Per-Flow Basis 3.5.2. Service Protection 3.5.3. Aggregation Considerations 3.5.4. End-System-Specific Considerations 3.5.5. Sub-network Considerations 4. Controller Plane (Management and Control) Considerations 4.1. DetNet Controller Plane Requirements 4.2. Generic Controller Plane Considerations 4.2.1. Flow Aggregation Control 4.2.2. Explicit Routes 4.2.3. Contention Loss and Jitter Reduction 4.2.4. Bidirectional Traffic 4.3. Packet Replication, Elimination, and Ordering Functions (PREOF) 5. Security Considerations 6. IANA Considerations 7. References 7.1. Normative References 7.2. Informative References Acknowledgements Contributors Authors' Addresses 1. Introduction DetNet (Deterministic Networking) provides the ability to carry specified unicast or multicast data flows for real-time applications with extremely low packet loss rates and assured maximum end-to-end delivery latency. A description of the general background and concepts of DetNet can be found in [RFC8655]. This document describes the concepts needed by any DetNet data plane specification (i.e., the DetNet-specific use of packet header fields) and provides considerations for any corresponding implementation. It covers the building blocks that provide the DetNet service, the DetNet service sub-layer, and the DetNet forwarding sub-layer functions as described in the DetNet architecture [RFC8655]. The DetNet architecture models the DetNet-related data plane functions as being decomposed into two sub-layers: a service sub-layer and a forwarding sub-layer. The service sub-layer is used to provide DetNet service protection and reordering. The forwarding sub-layer leverages traffic engineering mechanisms and provides congestion protection (low loss, assured latency, and limited out-of- order delivery). A particular forwarding sub-layer may have capabilities that are not available on other forwarding sub-layers.Show full document text