Deterministic Networking Architecture
draft-ietf-detnet-architecture-07
DetNet N. Finn
Internet-Draft Huawei
Intended status: Standards Track P. Thubert
Expires: February 4, 2019 Cisco
B. Varga
J. Farkas
Ericsson
August 3, 2018
Deterministic Networking Architecture
draft-ietf-detnet-architecture-07
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 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.
Status of This Memo
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This Internet-Draft will expire on February 4, 2019.
Copyright Notice
Copyright (c) 2018 IETF Trust and the persons identified as the
document authors. All rights reserved.
Finn, et al. Expires February 4, 2019 [Page 1]
Internet-Draft Deterministic Networking Architecture August 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1. Terms used in this document . . . . . . . . . . . . . . . 4
2.2. IEEE 802.1 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
3.2.1.1. 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 . . . . . . . . . . . 14
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 . . . . . . . . . . . . . . . . . . . . . 21
4.2.1. End system . . . . . . . . . . . . . . . . . . . . . 21
4.2.2. DetNet edge, relay, and transit nodes . . . . . . . . 22
4.3. DetNet flows . . . . . . . . . . . . . . . . . . . . . . 23
4.3.1. DetNet flow types . . . . . . . . . . . . . . . . . . 23
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