Deterministic Networking (DetNet) Data Plane: IP
RFC 8939

Document Type RFC - Proposed Standard (November 2020; No errata)
Authors Balazs Varga  , János Farkas  , Lou Berger  , Don Fedyk  , Stewart Bryant 
Last updated 2020-11-30
Replaces draft-ietf-detnet-dp-sol-ip
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Stream WG state Submitted to IESG for Publication
Document shepherd Ethan Grossman
Shepherd write-up Show (last changed 2020-02-03)
IESG IESG state RFC 8939 (Proposed Standard)
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Send notices to Ethan Grossman <eagros@dolby.com>
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Internet Engineering Task Force (IETF)                     B. Varga, Ed.
Request for Comments: 8939                                     J. Farkas
Category: Standards Track                                       Ericsson
ISSN: 2070-1721                                                L. Berger
                                                                D. Fedyk
                                                 LabN Consulting, L.L.C.
                                                               S. Bryant
                                                  Futurewei Technologies
                                                           November 2020

            Deterministic Networking (DetNet) Data Plane: IP

Abstract

   This document specifies the Deterministic Networking (DetNet) data
   plane operation for IP hosts and routers that provide DetNet service
   to IP-encapsulated data.  No DetNet-specific encapsulation is defined
   to support IP flows; instead, the existing IP-layer and higher-layer
   protocol header information is used to support flow identification
   and DetNet service delivery.  This document builds on the DetNet
   architecture (RFC 8655) and data plane framework (RFC 8938).

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/rfc8939.

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
     2.3.  Requirements Language
   3.  Overview of the DetNet IP Data Plane
   4.  DetNet IP Data Plane Considerations
     4.1.  End-System-Specific Considerations
     4.2.  DetNet Domain-Specific Considerations
     4.3.  Forwarding Sub-Layer Considerations
       4.3.1.  Class of Service
       4.3.2.  Quality of Service
       4.3.3.  Path Selection
     4.4.  DetNet Flow Aggregation
     4.5.  Bidirectional Traffic
   5.  DetNet IP Data Plane Procedures
     5.1.  DetNet IP Flow Identification Procedures
       5.1.1.  IP Header Information
       5.1.2.  Other Protocol Header Information
     5.2.  Forwarding Procedures
     5.3.  DetNet IP Traffic Treatment Procedures
   6.  Management and Control Information Summary
   7.  Security Considerations
   8.  IANA Considerations
   9.  References
     9.1.  Normative References
     9.2.  Informative References
   Acknowledgements
   Contributors
   Authors' Addresses

1.  Introduction

   Deterministic Networking (DetNet) is a service that can be offered by
   a network to DetNet flows.  DetNet provides these flows with
   extremely low packet loss rates and assured maximum end-to-end
   delivery latency.  General background and concepts of DetNet can be
   found in the DetNet architecture [RFC8655].

   This document specifies the DetNet data plane operation for IP hosts
   and routers that provide DetNet service to IP-encapsulated data.  No
   DetNet-specific encapsulation is defined to support IP flows;
   instead, the existing IP-layer and higher-layer protocol header
   information is used to support flow identification and DetNet service
   delivery.  Common data plane procedures and control information for
   all DetNet data planes can be found in [RFC8938].

   The DetNet architecture models the DetNet-related data plane
   functions as two sub-layers: a service sub-layer and a forwarding
   sub-layer.  The service sub-layer is used to provide DetNet service
   protection (e.g., by the Packet Replication Function (PRF) and Packet
   Elimination Function (PEF)) and reordering.  The forwarding sub-layer
   is used to provide congestion protection (low loss, assured latency,
   and limited out-of-order delivery).  The service sub-layer generally
   requires additional header fields to provide its service; for
   example, see [DetNet-MPLS].  Since no DetNet-specific fields are
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