Deterministic Networking Architecture
draft-ietf-detnet-architecture-13

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DetNet                                                           N. Finn
Internet-Draft                                                    Huawei
Intended status: Standards Track                              P. Thubert
Expires: November 7, 2019                                          Cisco
                                                                B. Varga
                                                               J. Farkas
                                                                Ericsson
                                                             May 6, 2019

                 Deterministic Networking Architecture
                   draft-ietf-detnet-architecture-13

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 IEEE
   802.1 Time-Sensitive Networking (TSN).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on November 7, 2019.

Finn, et al.            Expires November 7, 2019                [Page 1]
Internet-Draft    Deterministic Networking Architecture         May 2019

Copyright Notice

   Copyright (c) 2019 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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Terms used in this document . . . . . . . . . . . . . . .   4
     2.2.  IEEE 802.1 TSN to DetNet dictionary . . . . . . . . . . .   7
   3.  Providing the DetNet Quality of Service . . . . . . . . . . .   7
     3.1.  Primary goals defining the DetNet QoS . . . . . . . . . .   8
     3.2.  Mechanisms to achieve DetNet QoS  . . . . . . . . . . . .  10
       3.2.1.  Resource allocation . . . . . . . . . . . . . . . . .  10
         3.2.1.1.  Eliminate contention loss . . . . . . . . . . . .  10
         3.2.1.2.  Jitter Reduction  . . . . . . . . . . . . . . . .  11
       3.2.2.  Service Protection  . . . . . . . . . . . . . . . . .  11
         3.2.2.1.  In-Order Delivery . . . . . . . . . . . . . . . .  12
         3.2.2.2.  Packet Replication and Elimination  . . . . . . .  12
         3.2.2.3.  Packet encoding for service protection  . . . . .  14
       3.2.3.  Explicit routes . . . . . . . . . . . . . . . . . . .  14
     3.3.  Secondary goals for DetNet  . . . . . . . . . . . . . . .  15
       3.3.1.  Coexistence with normal traffic . . . . . . . . . . .  15
       3.3.2.  Fault Mitigation  . . . . . . . . . . . . . . . . . .  16
   4.  DetNet Architecture . . . . . . . . . . . . . . . . . . . . .  17
     4.1.  DetNet stack model  . . . . . . . . . . . . . . . . . . .  17
       4.1.1.  Representative Protocol Stack Model . . . . . . . . .  17
       4.1.2.  DetNet Data Plane Overview  . . . . . . . . . . . . .  20
       4.1.3.  Network reference model . . . . . . . . . . . . . . .  22
     4.2.  DetNet systems  . . . . . . . . . . . . . . . . . . . . .  23
       4.2.1.  End system  . . . . . . . . . . . . . . . . . . . . .  23