Deterministic Networking Architecture
draft-ietf-detnet-architecture-08

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02
• 03
• 04
• 05
• 06
• 07
• 08

DetNet                                                           N. Finn
Internet-Draft                                                    Huawei
Intended status: Standards Track                              P. Thubert
Expires: March 16, 2019                                            Cisco
                                                                B. Varga
                                                               J. Farkas
                                                                Ericsson
                                                      September 12, 2018

                 Deterministic Networking Architecture
                   draft-ietf-detnet-architecture-08

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.  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 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 sub-network technologies such as MPLS and
   IEEE 802.1 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 March 16, 2019.

Finn, et al.             Expires March 16, 2019                 [Page 1]
Internet-Draft    Deterministic Networking Architecture   September 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
   (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 . . . . . . . . . .   7
     3.2.  Mechanisms to achieve DetNet QoS  . . . . . . . . . . . .   9
       3.2.1.  Congestion protection . . . . . . . . . . . . . . . .   9
         3.2.1.1.  Eliminate congestion loss . . . . . . . . . . . .   9
         3.2.1.2.  Jitter Reduction  . . . . . . . . . . . . . . . .  10
       3.2.2.  Service Protection  . . . . . . . . . . . . . . . . .  11
         3.2.2.1.  In-Order Delivery . . . . . . . . . . . . . . . .  11
         3.2.2.2.  Packet Replication and Elimination  . . . . . . .  11
         3.2.2.3.  Packet encoding for service protection  . . . . .  13
       3.2.3.  Explicit routes . . . . . . . . . . . . . . . . . . .  13
     3.3.  Secondary goals for DetNet  . . . . . . . . . . . . . . .  14
       3.3.1.  Coexistence with normal traffic . . . . . . . . . . .  15
       3.3.2.  Fault Mitigation  . . . . . . . . . . . . . . . . . .  15
   4.  DetNet Architecture . . . . . . . . . . . . . . . . . . . . .  16
     4.1.  DetNet stack model  . . . . . . . . . . . . . . . . . . .  16
       4.1.1.  Representative Protocol Stack Model . . . . . . . . .  16
       4.1.2.  DetNet Data Plane Overview  . . . . . . . . . . . . .  18
       4.1.3.  Network reference model . . . . . . . . . . . . . . .  20
     4.2.  DetNet systems  . . . . . . . . . . . . . . . . . . . . .  22
       4.2.1.  End system  . . . . . . . . . . . . . . . . . . . . .  22
       4.2.2.  DetNet edge, relay, and transit nodes . . . . . . . .  23