Deterministic Networking Architecture
draft-ietf-detnet-architecture-10
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Active Internet-Draft (detnet WG)
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2018-12-19
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draft-finn-detnet-architecture
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IETF
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Proposed Standard
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Lou Berger
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Shepherd write-up |
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(last changed 2018-09-14)
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Waiting for Writeup
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Yes
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Responsible AD |
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Deborah Brungard
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Send notices to |
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Lou Berger <lberger@labn.net>
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Version Changed - Review Needed
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DetNet N. Finn
Internet-Draft Huawei
Intended status: Standards Track P. Thubert
Expires: June 22, 2019 Cisco
B. Varga
J. Farkas
Ericsson
December 19, 2018
Deterministic Networking Architecture
draft-ietf-detnet-architecture-10
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 within a network
domain. Techniques used include: 1) reserving data plane resources
for individual (or aggregated) DetNet flows in some or all of the
intermediate nodes 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 Time-Sensitive Networking (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 June 22, 2019.
Finn, et al. Expires June 22, 2019 [Page 1]
Internet-Draft Deterministic Networking Architecture December 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 . . . . . . . . . . . . 10
3.2.1. Resource allocation . . . . . . . . . . . . . . . . . 10
3.2.1.1. Eliminate contention loss . . . . . . . . . . . . 10
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 . . . . . . . 12
3.2.2.3. Packet encoding for service protection . . . . . 14
3.2.3. Explicit routes . . . . . . . . . . . . . . . . . . . 14
3.3. Secondary goals for DetNet . . . . . . . . . . . . . . . 15
3.3.1. Coexistence with normal traffic . . . . . . . . . . . 15
3.3.2. Fault Mitigation . . . . . . . . . . . . . . . . . . 16
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 . . . . . . . . . . . . . 19
4.1.3. Network reference model . . . . . . . . . . . . . . . 21
4.2. DetNet systems . . . . . . . . . . . . . . . . . . . . . 22
4.2.1. End system . . . . . . . . . . . . . . . . . . . . . 22
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