IEC 62439-3:2016

Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)

IEC 62439-3:2016 is applicable to high-availability automation networks based on the Ethernet technology. This part of IEC 62439 specifies two redundancy protocols designed to provide seamless recovery in case of single failure of an inter-bridge link or bridge in the network, which are based on the same scheme: parallel transmission of duplicated information. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- technical corrections and extension of specifications;
- consideration of IEC 61588 clock synchronization with end-to-end delay measurement alongside the existing peer-to-peer delay measurement in PRP.

Réseaux de communication industriels - Réseaux d'automatisme à haute disponibilité - Partie 3: Protocole de redondance en parallèle (PRP) et redondance transparente de haute disponibilité (HSR)

L'IEC 62439-3:2016 s'applique aux réseaux d'automatisme à haute disponibilité basés sur la technologie Ethernet. Cette partie de l'IEC 62439 spécifie deux protocoles de redondance conçus pour assurer une reprise transparente en cas de défaillance unique de liaison interpont ou de pont au sein du réseau, basés sur le schéma: transmission en parallèle d'informations dupliquées. Cette troisième édition annule et remplace la deuxième édition parue en 2012. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- corrections techniques et extension des spécifications;
- prise en compte de la synchronisation des horloges selon l'IEC 61588 lors de la mesure du délai entre extrémités et la mesure existante du délai entre homologues dans le protocole PRP.

General Information

• Status: Published
• Publication Date: 30-Mar-2016
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: SC 65C - Industrial networks
• Drafting Committee: WG 15 - TC 65/SC 65C/WG 15
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 15-Dec-2021

Relations

• Revises: IEC 62439-3:2012 - Industrial communication networks - High availability automation networks - Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62439-3 ®
Edition 3.0 2016-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – High availability automation networks –
Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless
Redundancy (HSR)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

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About the IEC
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International Standards for all electrical, electronic and related technologies.

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IEC 62439-3 ®
Edition 3.0 2016-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – High availability automation networks –

Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless

Redundancy (HSR)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040, 35.040 ISBN 978-2-8322-3291-0

– 2 – IEC 62439-3:2016 RLV  IEC 2016

CONTENTS
FOREWORD . 8

INTRODUCTION . 10

0.1 General . 10

0.2 Changes with respect to the previous edition . 10

0.3 Patent declaration . 11

1 Scope . 13

2 Normative references . 13
3 Terms, definitions, abbreviations, acronyms, and conventions . 14
3.1 Terms and definitions . 14
3.2 Abbreviations and acronyms . 15
3.3 Conventions . 16
4 Parallel Redundancy Protocol (PRP) . 16
4.1 PRP principle of operation . 16
4.1.1 PRP network topology . 16
4.1.2 PRP LANs with linear or bus topology . 17
4.1.3 PRP LANs with ring topology . 17
4.1.4 DANP node structure . 18
4.1.5 PRP attachment of singly attached nodes . 19
4.1.6 Compatibility between singly and doubly attached nodes . 19
4.1.7 Network management . 19
4.1.8 Implication on configuration application . 20
4.1.9 Transition to non-redundant networks . 20
4.1.10 Duplicate handling . 20
4.1.11 Network supervision . 26
4.1.12 Redundancy management interface . 26
4.2 PRP protocol specifications . 26
4.2.1 Installation, configuration and repair guidelines . 26
4.2.2 Unicast MAC addresses . 27
4.2.3 Multicast MAC addresses . 27
4.2.4 IP addresses . 27
4.2.5 Nodes . 27
4.2.6 Duplicate Accept mode (testing only) . 28
4.2.7 Duplicate Discard mode . 28
4.3.2 PRP_Supervision frame contents . 33
4.3.3 PRP_Supervision frame for RedBox . 34
4.3.4 Reception of a PRP_Supervision frame and NodesTable . 34
4.3 PRP_Supervision frame . 32
4.3.1 PRP_Supervision frame format . 32
4.4 Bridging node . 35
4.5 Constants . 35
4.6 PRP service specification . 35
5 High-availability Seamless Redundancy (HSR) . 36
5.1 HSR objectives . 36
5.2 HSR principle of operation. 36
5.2.1 Basic operation with a ring topology . 36

5.2.2 DANH node structure . 38

5.2.3 Topology . 38

5.2.4 RedBox structure . 46

5.3 HSR node specifications . 48

5.3.1 HSR operation . 48

5.3.2 DANH receiving from its link layer interface . 48

5.3.3 DANH receiving from an HSR port . 49

5.3.4 DANH forwarding rules . 50

5.3.5 CoS . 52

5.3.6 Clock synchronization . 52

5.3.7 Deterministic medium access . 52
5.4 HSR RedBox specifications . 52
5.4.1 RedBox properties. 52
5.4.2 RedBox receiving from interlink . 53
5.4.3 RedBox forwarding on the ring . 55
5.4.4 RedBox receiving from an HSR port . 55
5.4.5 RedBox receiving from its link layer interface . 57
5.4.6 Redbox ProxyNodeTable handling . 57
5.4.7 RedBox CoS . 57
5.4.8 RedBox clock synchronization . 58
5.4.9 RedBox medium access . 58
5.5 QuadBox specification . 58
5.6 Duplicate Discard method . 58
5.7 Frame format for HSR . 58
5.7.1 Frame format for all frames . 58
5.7.2 HSR_Supervision frame . 59
5.8 Constants . 62
5.9 HSR service specification . 63
6 Protocol Implementation Conformance Statement (PICS) . 64
7 PRP/HSR Management Information Base (MIB) . 65
Annex A (normative) Use of IEC 61588 and IEEE C37.238 for IEC 62439-3 .
Annex A (normative) Clocks synchronization over redundant paths in
IEC 62439-3 . 96
A.1 Overview . 96
A.2 Attachment to redundant LANs by a boundary clock . 96

A.3 Attachment to redundant LANs by doubly attached ordinary clocks . 97
A.4 PRP mapping to PTP . 99
A.4.1 Scenarios and device roles . 99
A.4.2 Operation in PRP . 101
A.4.3 Configuration specification . 102
A.4.4 Specifications of DANP as DAC . 103
A.4.5 Clock model of a RedBox for PTP . 103
A.5 HSR Mapping to PTP . 120
A.5.1 PTP traffic in HSR . 120
A.5.2 HSR nodes specifications . 123
A.5.3 Redundant clocks in HSR . 124
A.5.4 Attachment of an MC to an external LAN . 124
A.6 PRP to HSR Mapping . 125
A.6.1 Connection methods . 125

– 4 – IEC 62439-3:2016 RLV  IEC 2016

A.6.2 PRP-HSR connection by BC . 125

A.6.3 PRP-HSR connection by TCs . 126

A.7 Doubly attached clock model . 127

A.7.1 State machine . 127
...

IEC 62439-3 ®
Edition 3.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – High availability automation networks –
Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless
Redundancy (HSR)
Réseaux de communication industriels – Réseaux d'automatisme à haute
disponibilité –
Partie 3: Protocole de redondance en parallèle (PRP) et redondance transparente
de haute disponibilité (HSR)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
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International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

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IEC 62439-3 ®
Edition 3.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – High availability automation networks –

Part 3: Parallel Redundancy Protocol (PRP) and High-availability Seamless

Redundancy (HSR)
Réseaux de communication industriels – Réseaux d'automatisme à haute

disponibilité –
Partie 3: Protocole de redondance en parallèle (PRP) et redondance transparente

de haute disponibilité (HSR)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040, 35.040 ISBN 978-2-8322-3150-0

– 2 – IEC 62439-3:2016  IEC 2016
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
0.1 General . 10
0.2 Changes with respect to the previous edition . 10
0.3 Patent declaration . 10
1 Scope . 12
2 Normative references. 12
3 Terms, definitions, abbreviations, acronyms, and conventions . 13
3.1 Terms and definitions . 13
3.2 Abbreviations and acronyms . 13
3.3 Conventions . 14
4 Parallel Redundancy Protocol (PRP) . 15
4.1 PRP principle of operation . 15
4.1.1 PRP network topology . 15
4.1.2 PRP LANs with linear or bus topology . 15
4.1.3 PRP LANs with ring topology . 16
4.1.4 DANP node structure . 16
4.1.5 PRP attachment of singly attached nodes . 17
4.1.6 Compatibility between singly and doubly attached nodes . 18
4.1.7 Network management . 18
4.1.8 Implication on application . 18
4.1.9 Transition to non-redundant networks . 18
4.1.10 Duplicate handling . 19
4.1.11 Network supervision . 24
4.1.12 Redundancy management interface . 24
4.2 PRP protocol specifications . 24
4.2.1 Installation, configuration and repair guidelines . 24
4.2.2 Unicast MAC addresses . 25
4.2.3 Multicast MAC addresses . 25
4.2.4 IP addresses . 25
4.2.5 Nodes . 25
4.2.6 Duplicate Accept mode (testing only) . 26
4.2.7 Duplicate Discard mode . 26
4.3 PRP_Supervision frame . 30
4.3.1 PRP_Supervision frame format . 30
4.3.2 PRP_Supervision frame contents . 31
4.3.3 PRP_Supervision frame for RedBox . 32
4.3.4 Reception of a PRP_Supervision frame and NodesTable . 32
4.4 Bridging node . 33
4.5 Constants . 33
4.6 PRP service specification . 33
5 High-availability Seamless Redundancy (HSR) . 33
5.1 HSR objectives . 33
5.2 HSR principle of operation . 34
5.2.1 Basic operation with a ring topology . 34
5.2.2 DANH node structure . 35

5.2.3 Topology . 36
5.2.4 RedBox structure . 44
5.3 HSR node specifications . 46
5.3.1 HSR operation . 46
5.3.2 DANH receiving from its link layer interface . 46
5.3.3 DANH receiving from an HSR port . 47
5.3.4 DANH forwarding rules . 48
5.3.5 CoS . 49
5.3.6 Clock synchronization . 50
5.3.7 Deterministic medium access . 50
5.4 HSR RedBox specifications . 50
5.4.1 RedBox properties . 50
5.4.2 RedBox receiving from interlink . 50
5.4.3 RedBox forwarding on the ring . 52
5.4.4 RedBox receiving from an HSR port . 52
5.4.5 RedBox receiving from its link layer interface . 54
5.4.6 Redbox ProxyNodeTable handling . 54
5.4.7 RedBox CoS . 54
5.4.8 RedBox clock synchronization . 55
5.4.9 RedBox medium access . 55
5.5 QuadBox specification . 55
5.6 Duplicate Discard method .
...