Deterministic Networking Architecture
RFC 8655
Internet Engineering Task Force (IETF) N. Finn
Request for Comments: 8655 Huawei
Category: Standards Track P. Thubert
ISSN: 2070-1721 Cisco
B. Varga
J. Farkas
Ericsson
October 2019
Deterministic Networking Architecture
Abstract
This document provides the overall architecture for Deterministic
Networking (DetNet), which provides a capability to carry specified
unicast or multicast data flows for real-time applications with
extremely low data loss rates and bounded latency within a network
domain. Techniques used include 1) reserving data-plane resources
for individual (or aggregated) DetNet flows in some or all of the
intermediate nodes along the path of the flow, 2) providing explicit
routes for DetNet flows that do not immediately change with the
network topology, and 3) distributing data from DetNet flow packets
over time and/or space to ensure delivery of each packet's data in
spite of the loss of a path. DetNet operates at the IP layer and
delivers service over lower-layer technologies such as MPLS and Time-
Sensitive Networking (TSN) as defined by IEEE 802.1.
Status of This Memo
This is an Internet Standards Track document.
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). Further information on
Internet Standards is available in 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/rfc8655.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
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Table of Contents
1. Introduction
2. Terminology
2.1. Terms Used in This Document
2.2. Dictionary of Terms Used by TSN and DetNet
3. Providing the DetNet Quality of Service
3.1. Primary Goals Defining the DetNet QoS
3.2. Mechanisms to Achieve DetNet QoS
3.2.1. Resource Allocation
3.2.2. Service Protection
3.2.3. Explicit Routes
3.3. Secondary Goals for DetNet
3.3.1. Coexistence with Normal Traffic
3.3.2. Fault Mitigation
4. DetNet Architecture
4.1. DetNet Stack Model
4.1.1. Representative Protocol Stack Model
4.1.2. DetNet Data-Plane Overview
4.1.3. Network Reference Model
4.2. DetNet Systems
4.2.1. End System
4.2.2. DetNet Edge, Relay, and Transit Nodes
4.3. DetNet Flows
4.3.1. DetNet Flow Types
4.3.2. Source Transmission Behavior
4.3.3. Incomplete Networks
4.4. Traffic Engineering for DetNet
4.4.1. The Application Plane
4.4.2. The Controller Plane
4.4.3. The Network Plane
4.5. Queuing, Shaping, Scheduling, and Preemption
4.6. Service Instance
4.7. Flow Identification at Technology Borders
4.7.1. Exporting Flow Identification
4.7.2. Flow Attribute Mapping between Layers
4.7.3. Flow-ID Mapping Examples
4.8. Advertising Resources, Capabilities, and Adjacencies
4.9. Scaling to Larger Networks
4.10. Compatibility with Layer 2
5. Security Considerations
6. Privacy Considerations
7. IANA Considerations
8. Informative References
Acknowledgements
Authors' Addresses
1. Introduction
This document provides the overall architecture for Deterministic
Networking (DetNet), which provides a capability for the delivery of
data flows with extremely low packet loss rates and bounded end-to-
end delivery latency. DetNet is for networks that are under a single
administrative control or within a closed group of administrative
control; these include campus-wide networks and private WANs. DetNet
is not for large groups of domains such as the Internet.
DetNet operates at the IP layer and delivers service over lower-layer
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