IEC 62439-3:2010

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

IEC 62439-3:2009 specifies two redundancy protocols based on the duplication of the LAN, resp. duplication of the transmitted information, designed to provide seamless recovery in case of single failure of an inter-switch link or switch in the network. This standard cancels and replaces IEC 62439 published in 2008. This first edition constitutes a technical revision. This edition includes the following significant technical changes with respect to IEC 62439 (2008):
- adding a calculation method for RSTP (rapid spanning tree protocol, IEEE 802.1Q),
- adding two new redundancy protocols: HSR (High-availability Seamless Redundancy) and DRP (Distributed Redundancy Protocol),
- moving former Clauses 1 to 4 (introduction, definitions, general aspects) and the Annexes (taxonomy, availability calculation) to IEC 62439-1, which serves now as a base for the other documents,
- moving Clause 5 (MRP) to IEC 62439-2 with minor editorial changes,
- moving Clause 6 (PRP) to IEC 62439-3 with minor editorial changes,
- moving Clause 7 (CRP) to IEC 62439-4 with minor editorial changes, and
- moving Clause 8 (BRP) to IEC 62439-5 with minor editorial changes,
- adding a method to calculate the maximum recovery time of RSTP in a restricted configuration (ring) to IEC 62439-1 as Clause 8,
- adding specifications of the HSR (High-availability Seamless Redundancy) protocol, which shares the principles of PRP to IEC 62439-3 as Clause 5, and
- introducing the DRP protocol as IEC 62439-6. This bilingual version (2016-07) corresponds to the English version, published in 2012-07.

Réseaux de communications industriels - Réseaux de haute disponsibilité pour l'automation - Partie 3: Protocole de redondance en parallèle (PRP) et redondance transparente de haute disponibilité (HSR)

L'IEC 62439-3:2009 spécifie deux protocoles de redondance basés sur la duplication du réseau local ou sur la duplication des informations transmises, afin de permettre une reprise transparente en cas de défaillance unique d'une maille inter-étage ou d'un commutateur au sein du réseau. La présente norme annule et remplace l'IEC 62439, publiée en 2008. Cette première édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition IEC 62439 (2008):
- ajout d'une méthode de calcul pour RSTP (protocole à convergence d'arborescence rapide, IEEE 802.1Q),
- ajout de deux nouveaux protocoles de redondance: HSR (High-availability Seamless Redundancy) et DRP (Distributed Redundancy Protocol),
- transfert des anciens Articles 1 à 4 (introduction, définitions, aspects généraux) et des Annexes (taxonomie, calcul de disponibilité) vers IEC 62439-1, qui sert maintenant de base pour les autres documents,
- transfert de l'Article 5 (MRP) vers IEC 62439-2 avec des modifications éditoriales mineures,
- transfert de l'Article 6 (PRP) vers IEC 62439-3 avec des modifications éditoriales mineures,
- transfert de l'Article 7 (CRP) vers IEC 62439-4 avec des modifications éditoriales mineures,
- transfert de l'Article 8 (BRP) vers IEC 62439-5 avec des modifications éditoriales mineures,
- ajout d'une méthode pour calculer le temps de rétablissement maximum de RSTP dans une configuration limitée (anneau) à la norme IEC 62439-1 sous forme d'Article 8,
- ajout des spécifications du protocole HSR (High-availability Seamless Redundancy), qui partage les principes de PRP à la norme IEC 62439-3 sous forme d'Article 5, et
- présentation du protocole DRP comme norme IEC 62439-6. La présente version bilingue (2016-07) correspond à la version anglaise monolingue publiée en 2012-07.

General Information

• Status: Published
• Publication Date: 24-Feb-2010
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.100.05 - Multilayer applications
• Technical Committee: SC 65C - Industrial networks
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 05-Jul-2012

Relations

• Replaces: IEC 62439:2008 - High availability automation networks
• Effective Date: 05-Sep-2023
• Revised: 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 1.0 2010-02
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 your local IEC member National Committee for further information.

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IEC 62439-3 ®
Edition 1.0 2010-02
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
PRICE CODE
XA
ICS 25.040, 35.040 ISBN 978-2-88910-706-3
– 2 – 62439-3 © IEC:2010(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
2 Normative references .8
3 Terms, definitions, abbreviations, acronyms, and conventions.8
3.1 Terms and definitions .8
3.2 Abbreviations and acronyms.9
3.3 Conventions .9
4 Parallel Redundancy Protocol (PRP) .9
4.1 PRP principle of operation.9
4.1.1 PRP network topology .9
4.1.2 PRP LANs with linear or bus topology .10
4.1.3 PRP LANs with ring topology.11
4.1.4 DANP node structure.11
4.1.5 PRP attachment of singly attached nodes.12
4.1.6 Compatibility between singly and doubly attached nodes.12
4.1.7 Network management.12
4.1.8 Implication on configuration .13
4.1.9 Transition to non-redundant networks.13
4.1.10 Duplicate handling.14
4.1.11 Configuration check.18
4.1.12 Network supervision .18
4.1.13 Redundancy management interface.19
4.2 PRP protocol specifications.19
4.2.1 Installation, configuration and repair guidelines .19
4.2.2 MAC addresses .20
4.2.3 Multicast MAC addresses .20
4.2.4 IP addresses .20
4.2.5 Nodes.20
4.2.6 Duplicate accept mode .21
4.2.7 Duplicate discard mode .21
4.3 PRP service specification .27
4.3.1 Arguments .27
4.3.2 NodesTable .28
4.3.3 PRP write .29
4.3.4 PRP read.30
5 High-availability Seamless Redundancy (HSR) .31
5.1 HSR objectives.31
5.2 HSR principle of operation.31
5.2.1 Basic operation with a ring topology .31
5.2.2 DANH node structure.33
5.2.3 Topology .34
5.2.4 RedBox structure.40
5.3 HSR node specifications .42
5.3.1 Host sequence number.42
5.3.2 DANH receiving from its link layer interface .42

62439-3 © IEC:2010(E) – 3 –
5.3.3 DANH receiving from an HSR port .42
5.3.4 DANH forwarding rules .43
5.3.5 CoS .44
5.3.6 Clock synchronization.44
5.3.7 Deterministic medium access .44
5.4 HSR RedBox specifications .44
5.4.1 RedBox properties.44
5.4.2 RedBox receiving from interlink .45
5.4.3 RedBox forwarding on the ring.46
5.4.4 RedBox receiving from an HSR port .46
5.4.5 Redbox proxy node table handling.47
5.4.6 RedBox CoS.47
5.4.7 RedBox clock synchonization .47
5.4.8 RedBox medium access .47
5.5 QuadBox specification.47
5.6 Association definition .47
5.7 Frame format for HSR .47
5.7.1 HSR-tagged frame format.47
5.7.2 HSR_Supervision frame .48
5.7.3 Constants .50
6 Protocol Implementation Conformance Statement (PICS) .51
7 PRP/HSR Management Information Base (MIB) .51
Bibliography.58

Figure 1 – PRP example of general redundant network.10
Figure 2 – PRP example of redundant network as two LANs (bus topology).10
Figure 3 – PRP example of redundant ring with SANs and DANPs.11
Figure 4 – PRP with two DANPs communicating .11
Figure 5 – PRP RedBox, transition from single to double LAN .13
Figure 6 – PRP frame extended by an RCT.15
Figure 7 – PRP VLAN-tagged frame extended by an RCT.15
Figure 8 – PRP constructed, padded frame closed by an RCT .16
Figure 9 – PRP drop window on LAN_A .17
Figure 10 – PRP drop window reduction after a discard .17
Figure 11 – PRP frame from LAN_B was not discarded.18
Figure 12 – PRP synchronized LANs .18
Figure 13 – HSR example of ring configuration for multicast traffic .32
Figure 14 – HSR example of ring configuration for unicast traffic .33
Figure 15 –HSR structure of a DANH .34
Figure 16 – HSR example of topology using two independent networks .35
Figure 17 – HSR example of peer coupling of two rings .36
Figure 18 – HSR example of connected rings .37
Figure 19 – HSR example of coupling two redundant PRP LANs to a ring .38
Figure 20 – HSR example of coupling from a ring node to redundant PRP LANs.39
Figure 21 – HSR example of meshed topology.40
Figure 22 – HSR structure of a RedBox .41

– 4 – 62439-3 © IEC:2010(E)
Figure 23 – HSR frame without VLAN tag .48
Figure 24 – HSR frame with VLAN tag .48

Table 1 – PRP_Supervision frame with VLAN tag .25
Table 2 – PRP constants .27
Table 3 – PRP arguments .28
Table 4 – PRP arguments .29
Table 5 – PRP write.29
Table 6 – PRP read .30
Table 7 – HSR_Supervision frame with optional VLAN tag .49
Table 8 – HSR Constants .50

62439-3 © IEC:2010(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICA
...

IEC 62439-3 ®
Edition 1.0 2010-02
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 communications industriels –Réseaux de haute disponibilite pour
l'automation –
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
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IEC 62439-3 ®
Edition 1.0 2010-02
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 communications industriels –Réseaux de haute disponibilite pour

l'automation –
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 978-2-8322-3228-6

– 2 – IEC 62439-3:2010  IEC 2010
CONTENTS
FOREWORD. 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions, abbreviations, acronyms, and conventions . 8
3.1 Terms and definitions . 8
3.2 Abbreviations and acronyms . 9
3.3 Conventions . 9
4 Parallel Redundancy Protocol (PRP) . 9
4.1 PRP principle of operation . 9
4.1.1 PRP network topology . 9
4.1.2 PRP LANs with linear or bus topology . 10
4.1.3 PRP LANs with ring topology . 11
4.1.4 DANP node structure . 11
4.1.5 PRP attachment of singly attached nodes . 12
4.1.6 Compatibility between singly and doubly attached nodes . 12
4.1.7 Network management . 12
4.1.8 Implication on configuration . 13
4.1.9 Transition to non-redundant networks . 13
4.1.10 Duplicate handling . 14
4.1.11 Configuration check . 18
4.1.12 Network supervision . 18
4.1.13 Redundancy management interface . 19
4.2 PRP protocol specifications . 19
4.2.1 Installation, configuration and repair guidelines . 19
4.2.2 MAC addresses . 20
4.2.3 Multicast MAC addresses . 20
4.2.4 IP addresses . 20
4.2.5 Nodes . 20
4.2.6 Duplicate accept mode . 21
4.2.7 Duplicate discard mode . 21
4.3 PRP service specification . 27
4.3.1 Arguments . 27
4.3.2 NodesTable . 28
4.3.3 PRP write . 29
4.3.4 PRP read . 30
5 High-availability Seamless Redundancy (HSR) . 31
5.1 HSR objectives . 31
5.2 HSR principle of operation . 32
5.2.1 Basic operation with a ring topology . 32
5.2.2 DANH node structure . 33
5.2.3 Topology. 34
5.2.4 RedBox structure . 40
5.3 HSR node specifications . 42
5.3.1 Host sequence number . 42
5.3.2 DANH receiving from its link layer interface . 42

5.3.3 DANH receiving from an HSR port . 42
5.3.4 DANH forwarding rules . 43
5.3.5 CoS . 44
5.3.6 Clock synchronization . 44
5.3.7 Deterministic medium access . 44
5.4 HSR RedBox specifications . 44
5.4.1 RedBox properties . 44
5.4.2 RedBox receiving from interlink . 45
5.4.3 RedBox forwarding on the ring . 46
5.4.4 RedBox receiving from an HSR port . 46
5.4.5 Redbox proxy node table handling . 47
5.4.6 RedBox CoS . 47
5.4.7 RedBox clock synchonization . 47
5.4.8 RedBox medium access . 47
5.5 QuadBox specification . 47
5.6 Association definition . 47
5.7 Frame format for HSR . 47
5.7.1 HSR-tagged frame format . 47
5.7.2 HSR_Supervision frame . 48
5.7.3 Constants . 50
6 Protocol Implementation Conformance Statement (PICS) . 51
7 PRP/HSR Management Information Base (MIB) . 51
Annex A (informative) PRP duplicate discard algorithm
...