Deterministic Networking Architecture
draft-ietf-detnet-architecture-03
DetNet N. Finn
Internet-Draft Huawei Technologies Co. Ltd
Intended status: Standards Track P. Thubert
Expires: February 9, 2018 Cisco
B. Varga
J. Farkas
Ericsson
August 8, 2017
Deterministic Networking Architecture
draft-ietf-detnet-architecture-03
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
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This Internet-Draft will expire on February 9, 2018.
Finn, et al. Expires February 9, 2018 [Page 1]
Internet-Draft Deterministic Networking Architecture August 2017
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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
3.3. Secondary goals for DetNet . . . . . . . . . . . . . . . 12
3.3.1. Coexistence with normal traffic . . . . . . . . . . . 12
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
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