Deterministic Networking Architecture
draft-ietf-detnet-architecture-05

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DetNet                                                           N. Finn
Internet-Draft                                                    Huawei
Intended status: Standards Track                              P. Thubert
Expires: November 2, 2018                                          Cisco
                                                                B. Varga
                                                               J. Farkas
                                                                Ericsson
                                                             May 1, 2018

                 Deterministic Networking Architecture
                   draft-ietf-detnet-architecture-05

Abstract

   Deterministic Networking (DetNet) provides a capability to carry
   specified unicast or multicast data flows for real-time applications
   with extremely low data loss rates and bounded latency.  Techniques
   used include: 1) reserving data plane resources for individual (or
   aggregated) DetNet flows in some or all of the intermediate nodes
   (e.g. bridges or routers) along the path of the flow; 2) providing
   explicit routes for DetNet flows that do not rapidly 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.  The capabilities can be managed by
   configuration, or by manual or automatic network management.

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
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   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 2, 2018.

Finn, et al.            Expires November 2, 2018                [Page 1]
Internet-Draft    Deterministic Networking Architecture         May 2018

Copyright Notice

   Copyright (c) 2018 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Terms used in this document . . . . . . . . . . . . . . .   4
     2.2.  IEEE 802 TSN to DetNet dictionary . . . . . . . . . . . .   6
   3.  Providing the DetNet Quality of Service . . . . . . . . . . .   7
     3.1.  Primary goals defining the DetNet QoS . . . . . . . . . .   7
     3.2.  Mechanisms to achieve DetNet Qos  . . . . . . . . . . . .   9
       3.2.1.  Congestion protection . . . . . . . . . . . . . . . .   9
       3.2.2.  Explicit routes . . . . . . . . . . . . . . . . . . .   9
       3.2.3.  Jitter Reduction  . . . . . . . . . . . . . . . . . .  10
       3.2.4.  Packet Replication and Elimination  . . . . . . . . .  11
       3.2.5.  Packet encoding for service protection  . . . . . . .  12
     3.3.  Secondary goals for DetNet  . . . . . . . . . . . . . . .  13
       3.3.1.  Coexistence with normal traffic . . . . . . . . . . .  13
       3.3.2.  Fault Mitigation  . . . . . . . . . . . . . . . . . .  13
   4.  DetNet Architecture . . . . . . . . . . . . . . . . . . . . .  14
     4.1.  DetNet stack model  . . . . . . . . . . . . . . . . . . .  14
       4.1.1.  Representative Protocol Stack Model . . . . . . . . .  14
       4.1.2.  DetNet Data Plane Overview  . . . . . . . . . . . . .  16
       4.1.3.  Network reference model . . . . . . . . . . . . . . .  18
     4.2.  DetNet systems  . . . . . . . . . . . . . . . . . . . . .  19
       4.2.1.  End system  . . . . . . . . . . . . . . . . . . . . .  19
       4.2.2.  DetNet edge, relay, and transit nodes . . . . . . . .  20
     4.3.  DetNet flows  . . . . . . . . . . . . . . . . . . . . . .  21
       4.3.1.  DetNet flow types . . . . . . . . . . . . . . . . . .  21
       4.3.2.  Source guarantees . . . . . . . . . . . . . . . . . .  21
       4.3.3.  Incomplete Networks . . . . . . . . . . . . . . . . .  23