IEC 62439-6:2010

Industrial communication networks - High availability automation networks - Part 6: Distributed Redundancy Protocol (DRP)

IEC 62439-6:2010 is applicable to high-availability automation networks based on the ISO/IEC 8802-3 (IEEE 802.3) (Ethernet) technology. It specifies a recovery protocol based on a ring topology, designed to react deterministically on a single failure of an inter-switch link or switch in the network. Each switch has equal management role in the network. Double rings are supported. It cancels and replaces IEC 62439 published in 2008 and constitutes a technical revision. It 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) was to IEC 62439-3 with minor editorial changes,
- moving Clause 7 (CRP) was to IEC 62439-4 with minor editorial changes, and
- moving Clause 8 (BRP) was 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 publication is to be read in conjunction with IEC 62439-1:2010.

Réseaux industriels de communication - Réseaux de haute disponibilité pour l'automation - Partie 6: Protocole de redondance distribuée (DRP)

La CEI 62439-6:2010 concerne les réseaux d'automation à haute disponibilité reposant sur la technologie (Ethernet) ISO/CEI 8802-3 (IEEE 802.3). Elle spécifie un protocole de récupération reposant sur une topologie en anneau, conçu pour réagir de manière déterministe sur une seule défaillance d'une maille inter-étage ou d'un commutateur du réseau. Chaque commutateur joue un rôle de gestion équivalent dans le réseau. Les anneaux doubles sont pris en charge. Elle annule et remplace la CEI 62439 publiée en 2008. Cette première édition constitue une révision technique. Elle inclut les modifications techniques majeures suivantes par rapport à la CEI 62439 (2008):
- ajout d'une méthode de calcul pour le protocole RSTP (Rapid Spanning Tree Protocol, IEEE 802.1Q),
- ajout de deux nouveaux protocoles de redondance: HSR (High-availability Seamless Redundancy) et DRP (Distributed Redundancy Protocol),
- déplacement des Articles 1 à 4 (Introduction, Définitions, Aspects généraux) et des Annexes (Taxinomie, Calcul de disponibilité) dans la CEI 62439-1, qui servent à présent de base aux autres documents,
- déplacement de l'Article 5 (MRP) dans la CEI 62439-2 avec peu de modifications éditoriales,
- déplacement de l'Article 6 (PRP) dans la CEI 62439-3 avec peu de modifications éditoriales,
- déplacement de l'Article 7 (CRP) dans la CEI 62439-4 avec peu de modifications éditoriales, et
- déplacement de l'Article 8 (BRP) dans la CEI 62439-5 avec peu de modifications éditoriales,
- ajout d'une méthode de calcul du temps de reprise maximal du protocole RSTP dans une configuration restreinte (anneau) dans la CEI 62439-1 (Article 8),
- ajout de spécifications du protocole HSR (High-availability Seamless Redundancy), qui partage les principes du protocole PRP dans la CEI 62439-3 (Article 5), et
- introduction du protocole DRP (CEI 62439-6).
Cette publication doit être lue conjointement avec la CEI 62439-1:2010.

General Information

• Status: Published
• Publication Date: 25-Feb-2010
• 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: PPUB - Publication issued
• Start Date: 15-Feb-2010
• Completion Date: 26-Feb-2010

Relations

• Replaces: IEC 62439:2008 - High availability automation networks
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62439-6 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – High availability automation networks –
Part 6: Distributed Redundancy Protocol (DRP)

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 62439-6 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – High availability automation networks –
Part 6: Distributed Redundancy Protocol (DRP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 25.040, 35.040 ISBN 978-2-88910-709-4
– 2 – 62439-6 © 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 Overview .9
4.1 Principles .9
4.2 Ring ports .10
4.3 DRP switch node.10
4.4 Single ring topology redundancy.11
4.5 Double ring topology redundancy .11
4.6 Configuration.12
4.6.1 Overview .12
4.6.2 Manufacturer configuration .12
4.6.3 Communication configuration.12
4.6.4 Application configuration .13
4.7 Start up .13
5 DRP communications .13
5.1 Overview .13
5.2 Communication procedure.15
5.3 Fault detection and recovery .18
5.3.1 General .18
5.3.2 Handling in a single ring network .19
5.3.3 Handling in a double ring network.20
5.4 Repairing the inter-switch link fault.21
5.5 Repairing time synchronization fault .21
5.6 Inserting a repaired switch node.22
5.7 Inserting a new switch node .23
6 DRP class specification .23
7 DRP attributes.24
8 DRP services .27
8.1 Read .27
8.2 Write .30
9 DRP protocol specification.32
9.1 Basic types encoding .32
9.2 ErrorDescription encoding .32
9.3 Encoding of DRP Class .33
9.4 PDU description .34
9.4.1 Encoding of DRP DLPDU .34
9.4.2 Encoding of DLSDU.35
9.4.3 Encoding of VLAN .35
9.4.4 Ethertype.35

62439-6 © IEC:2010(E) – 3 –
9.4.5 Encoding of DRP PDU.35
9.4.6 Encoding of DRP_DATA .36
9.4.7 Encoding of Read Service .40
9.4.8 Encoding of Write Service primitives.42
9.5 Protocol machine.44
9.5.1 Switch node states description .44
9.5.2 Protocol State Machine description.44
9.5.3 State transitions .45
9.5.4 Function descriptions.52
Bibliography.64

Figure 1 – DRP communication model .10
Figure 2 – Single ring topology redundancy .11
Figure 3 – Double ring topology redundancy .12
Figure 4 – DRP communication procedure .14
Figure 5 – Inserting a new switch node into the DRP system .14
Figure 6 – Fault detection and recovery .15
Figure 7 – Fault detection and recovery of single ring topology redundancy.19
Figure 8 – Single inter-switch link fault detection and recovery of double ring topology
redundancy.20
Figure 9 – Double inter-switch link fault detection and recovery of double ring topology
redundancy.21
Figure 10 – Inserting a repaired switch node.22
Figure 11 – DRP protocol state machine .45

Table 1 – Relationship between required recovery time and the TargetTimeSyncClass.22
Table 2 – Parameters of Read service .27
Table 3 – Parameters of Write service .30
Table 4 – Error Type definition.32
Table 5 – Error Code definition .33
Table 6 – Definition of DRP Class.33
Table 7 – DRP OUI .34
Table 8 – DRP MulticastMACAddress .35
Table 9 – Encoding of DLSDU .35
Table 10 – Encoding of DRP PDU.35
Table 11 – DRP_Type definition .35
Table 12 – Encoding of RingCheck frame .36
Table 13 – Encoding of DeviceAnnunciation frame.37
Table 14 – Encoding of RingChange frame .39
Table 15 – Encoding of LinkCheck frame .39
Table 16 – Encoding of LinkAlarm frame.40
Table 17 – Encoding of LinkChange frame.40
Table 18 – Encoding of Read Request .41
Table 19 – Encoding of Read Service Positive Response .41
Table 20 – Encoding of Read Service Negative Response .42

– 4 – 62439-6 © IEC:2010(E)
Table 21 – Encoding of Write Request .43
Table 22 – Encoding of Write Service Positive Response.43
Table 23 – Encoding of Write Service Negative Response .43
Table 24 – DRP state transitions.46
Table 25 – SetRingPortState() descriptions .52
Table 26 – LoadRingPortState() descriptions .52
Table 27 – WriteSucceed() descriptions.52
Table 28 – SynchronizationFinished() descriptions .53
Table 29 – ActivePortLinkState() descriptions.53
Table 30 – StandbyPortLinkState() descriptions.53
Table 31 – ConfigureInfo() descriptions .
...

IEC 62439-6 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – High availability automation networks –
Part 6: Distributed Redundancy Protocol (DRP)

Réseaux industriels de communication – Réseaux de haute disponibilité pour
l’automation –
Partie 6: Protocole de redondance distribuée (DRP)

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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International Standards for all electrical, electronic and related technologies.

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IEC 62439-6 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial communication networks – High availability automation networks –

Part 6: Distributed Redundancy Protocol (DRP)

Réseaux industriels de communication – Réseaux de haute disponibilité pour

l’automation –
Partie 6: Protocole de redondance distribuée (DRP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 25.040, 35.040 ISBN 978-2-83220-533-4

– 2 – 62439-6  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 Overview . 9
4.1 Principles . 9
4.2 Ring ports . 10
4.3 DRP switch node . 10
4.4 Single ring topology redundancy . 11
4.5 Double ring topology redundancy . 11
4.6 Configuration . 12
4.6.1 Overview . 12
4.6.2 Manufacturer configuration . 12
4.6.3 Communication configuration. 12
4.6.4 Application configuration . 13
4.7 Start up . 13
5 DRP communications . 13
5.1 Overview . 13
5.2 Communication procedure . 15
5.3 Fault detection and recovery . 18
5.3.1 General . 18
5.3.2 Handling in a single ring network . 19
5.3.3 Handling in a double ring network . 20
5.4 Repairing the inter-switch link fault . 21
5.5 Repairing time synchronization fault . 21
5.6 Inserting a repaired switch node . 22
5.7 Inserting a new switch node . 23
6 DRP class specification . 23
7 DRP attributes . 24
8 DRP services . 27
8.1 Read . 27
8.2 Write . 30
9 DRP protocol specification. 32
9.1 Basic types encoding . 32
9.2 ErrorDescription encoding . 32
9.3 Encoding of DRP Class . 33
9.4 PDU description . 34
9.4.1 Encoding of DRP DLPDU . 34
9.4.2 Encoding of DLSDU . 35
9.4.3 Encoding of VLAN . 35
9.4.4 Ethertype . 35

62439-6  IEC:2010 – 3 –
9.4.5 Encoding of DRP PDU . 35
9.4.6 Encoding of DRP_DATA . 36
9.4.7 Encoding of Read Service . 40
9.4.8 Encoding of Write Service primitives . 42
9.5 Protocol machine. 44
9.5.1 Switch node states description . 44
9.5.2 Protocol State Machine description . 44
9.5.3 State transitions . 45
9.5.4 Function descriptions . 52
Bibliography . 64

Figure 1 – DRP communication model . 10
Figure 2 – Single ring topology redundancy . 11
Figure 3 – Double ring topology redundancy . 12
Figure 4 – DRP communication procedure . 14
Figure 5 – Inserting a new switch node into the DRP system . 14
Figure 6 – Fault detection and recovery . 15
Figure 7 – Fault detection and recovery of single ring topology redundancy . 19
Figure 8 – Single inter-switch link fault detection and recovery of double ring topology
redundancy . 20
Figure 9 – Double inter-switch link fault detection and recovery of double ring topology
redundancy . 21
Figure 10 – Inserting a repaired switch node . 22
Figure 11 – DRP protocol state machine . 45

Table 1 – Relationship between required recovery time and the TargetTimeSyncClass . 22
Table 2 – Parameters of Read service . 27
Table 3 – Parameters of Write service . 30
Table 4 – Error Type definition . 32
Table 5 – Error Code definition . 33
Table 6 – Definition of DRP Class . 33
Table 7 – DRP OUI .
...