Large-Scale Deterministic Network
draft-qiang-detnet-large-scale-detnet-02

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Network Working Group                                      L. Qiang, Ed.
Internet-Draft                                                    B. Liu
Intended status: Informational                            T. Eckert, Ed.
Expires: March 31, 2019                                           Huawei
                                                                 L. Geng
                                                                 L. Wang
                                                            China Mobile
                                                      September 27, 2018

                   Large-Scale Deterministic Network
                draft-qiang-detnet-large-scale-detnet-02

Abstract

   This document presents the framework and key methods for Large-scale
   Deterministic Networks (LDN).  It achieves scalability for the number
   of supportable deterministic traffic flows via Scalable Deterministic
   Forwarding (SDF) that does not require per-flow state in transit
   nodes and precise time synchronization among nodes.  It achieves
   Scalable Resource Reservation (SRR) by allowing for it to be
   decoupled from the forwarding plane nodes, and aggregating resource
   reservation status in time slots.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on March 31, 2019.

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   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Terminology & Abbreviations . . . . . . . . . . . . . . .   3
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Summary . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Background  . . . . . . . . . . . . . . . . . . . . . . .   4
       2.2.1.  Deterministic End-to-End Latency  . . . . . . . . . .   4
       2.2.2.  Hop-by-Hop Delay  . . . . . . . . . . . . . . . . . .   4
       2.2.3.  Cyclic Forwarding . . . . . . . . . . . . . . . . . .   5
       2.2.4.  Co-Existence with Non-Deterministic Traffic . . . . .   5
     2.3.  System Components . . . . . . . . . . . . . . . . . . . .   6
   3.  Scalable Deterministic Forwarding . . . . . . . . . . . . . .   7
     3.1.  Three Queues  . . . . . . . . . . . . . . . . . . . . . .   8
     3.2.  Cycle Mapping . . . . . . . . . . . . . . . . . . . . . .   9
       3.2.1.  Cycle Identifier Carrying . . . . . . . . . . . . . .   9
   4.  Scalable Resource Reservation . . . . . . . . . . . . . . . .  10
   5.  Performance Analysis  . . . . . . . . . . . . . . . . . . . .  11
     5.1.  Queueing Delay  . . . . . . . . . . . . . . . . . . . . .  11
     5.2.  Jitter  . . . . . . . . . . . . . . . . . . . . . . . . .  12
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  14
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  14
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   Deploying deterministic service over large-scale network will face
   some technical challenges, such as

   o  massive number of deterministic flows vs. per-flow operation and
      management;

   o  long link propagation may bring in significant jitter;

   o  time synchronization is hard to be achieved among numerous
      devices, etc.

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