IEC 62439-2:2010

Industrial communication networks - High availability automation networks - Part 2: Media Redundancy Protocol (MRP)

IEC 62439-2:2010 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, under the control of a dedicated media redundancy manager node. 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'automatisation - Partie 2: Protocole de redondance du support (MRP)

La CEI 62439-2:2010 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, sous le contrôle d'un noeud du gestionnaire de redondance de support dédié. Elle annule et remplace la CEI 62439 publiée en 2008 et constitue une révision technique. Ell 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: 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: 30-Mar-2016

Relations

• Replaces: IEC 62439:2008 - High availability automation networks
• Effective Date: 05-Sep-2023
• Revised: IEC 62439-2:2016 - Industrial communication networks - High availability automation networks - Part 2: Media Redundancy Protocol (MRP)
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62439-2 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
Industrial communication networks – High availability automation networks –
Part 2: Media Redundancy Protocol (MRP)

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.
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IEC 62439-2 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
Industrial communication networks – High availability automation networks –
Part 2: Media Redundancy Protocol (MRP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 25.040, 35.040 ISBN 978-2-88910-705-6
– 2 – 62439-2 © 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.8
3.3 Conventions .9
4 MRP Overview.9
5 MRP Media redundancy behavior .10
5.1 Ring ports .10
5.2 Media Redundancy Manager (MRM).11
5.3 Media Redundancy Client (MRC).12
5.4 Redundancy domain.12
5.5 Usage with diagnosis and alarms .12
5.6 Ring diagnosis.13
5.7 Multiple MRM in a single ring .13
5.8 BLOCKED not supported (option) .13
6 MRP Class specification .14
6.1 General .14
6.2 Template .14
6.3 Attributes.14
7 MRP service specification.17
7.1 Start MRM.17
7.2 Stop MRM .18
7.3 State Change .19
7.4 Start MRC .20
7.5 Stop MRC.21
7.6 Read MRM .22
7.7 Read MRC .24
8 MRP protocol specification .25
8.1 PDU description .25
8.1.1 Basic data types .25
8.1.2 DLPDU abstract syntax reference.25
8.1.3 Coding of the DLPDU field SourceAddress .26
8.1.4 Coding of the DLPDU field DestinationAddress.26
8.1.5 Coding of the field TagControlInformation.27
8.1.6 Coding of the field LT .27
8.1.7 MRP APDU abstract syntax .27
8.1.8 Coding of the field MRP_TLVHeader .28
8.1.9 Coding of the field MRP_Version .29
8.1.10 Coding of the field MRP_SequenceID .29
8.1.11 Coding of the field MRP_SA .29
8.1.12 Coding of the field MRP_Prio.29
8.1.13 Coding of the field MRP_PortRole .29
8.1.14 Coding of the field MRP_RingState.29

62439-2 © IEC:2010(E) – 3 –
8.1.15 Coding of the field MRP_Interval .30
8.1.16 Coding of the field MRP_Transition .30
8.1.17 Coding of the field MRP_TimeStamp .30
8.1.18 Coding of the field MRP_Blocked.30
8.1.19 Coding of the field MRP_ManufacturerOUI .31
8.1.20 Coding of the field MRP_ManufacturerData .31
8.1.21 Coding of the field MRP_DomainUUID.31
8.2 Protocol machines.31
8.2.1 MRM protocol machine .31
8.2.2 MRC protocol machine .41
8.2.3 MRM and MRC functions .48
8.2.4 FDB clear timer .51
8.2.5 Topology change timer .51
9 MRP installation, configuration and repair .51
9.1 Ring port parameters.51
9.2 Ring topology parameters.52
9.3 MRM parameters.52
9.4 MRC parameters and constraints .52
9.5 Calculation of MRP ring recovery time.53
9.5.1 Overview .53
9.5.2 Deduction of formula .53
9.5.3 Worst case calculation for recovery time of 10 ms .55
9.5.4 Worst case calculation for 50 devices .56
10 MRP Management Information Base (MIB) .56
10.1 General .56
10.2 MRP MIB with a monitoring view .56
10.3 MRP MIB with a management and monitoring view.64
Bibliography.73

Figure 1 – MRP stack .10
Figure 2 – MRP ring topology with one manager and clients .11
Figure 3 – MRP open ring with MRM.11
Figure 4 – MRP ring with more than one MRM .13
Figure 5 – MRP protocol machine for MRM.32
Figure 6 – MRP protocol machine for MRC .42

Table 1 – MRP Start MRM .17
Table 2 – MRP Stop MRM.18
Table 3 – MRP Change State.19
Table 4 – MRP Start MRC.20
Table 5 – MRP Stop MRC .21
Table 6 – MRP Read MRM .22
Table 7 – MRP Read MRC.24
Table 8 – MRP DLPDU syntax for ISO/IEC 8802-3 (IEEE 802.3).26
Table 9 – MRP OUI.26
Table 10 – MRP MulticastMACAddress.27

– 4 – 62439-2 © IEC:2010(E)
Table 11 – MRP TagControlInformation.Priority field.27
Table 12 – MRP LT field .27
Table 13 – MRP APDU syntax .28
Table 14 – MRP Substitutions.28
Table 15 – MRP_TLVHeader.Type.28
Table 16 – MRP_Version .29
Table 17 – MRP_Prio.29
Table 18 – MRP_PortRole .29
Table 19 – MRP_RingState.30
Table 20 – MRP_Interval .30
Table 21 – MRP_Transition.
...

IEC 62439-2 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – High availability automation networks –
Part 2: Media Redundancy Protocol (MRP)

Réseaux industriels de communication – Réseaux de haute disponibilité pour
l’automation –
Partie 2: Protocole de redondance du support (MRP)

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.
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IEC 62439-2 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – High availability automation networks –

Part 2: Media Redundancy Protocol (MRP)

Réseaux industriels de communication – Réseaux de haute disponibilité pour

l’automation –
Partie 2: Protocole de redondance du support (MRP)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XB
ICS 25.040, 35.040 ISBN 978-2-88912-000-0

– 2 – 62439-2  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 . 8
3.3 Conventions . 9
4 MRP Overview. 9
5 MRP Media redundancy behavior . 10
5.1 Ring ports . 10
5.2 Media Redundancy Manager (MRM) . 11
5.3 Media Redundancy Client (MRC) . 12
5.4 Redundancy domain . 12
5.5 Usage with diagnosis and alarms . 12
5.6 Ring diagnosis. 13
5.7 Multiple MRM in a single ring . 13
5.8 BLOCKED not supported (option) . 13
6 MRP Class specification . 14
6.1 General . 14
6.2 Template . 14
6.3 Attributes. 14
7 MRP service specification. 17
7.1 Start MRM . 17
7.2 Stop MRM . 18
7.3 State Change . 19
7.4 Start MRC . 20
7.5 Stop MRC. 21
7.6 Read MRM . 22
7.7 Read MRC . 24
8 MRP protocol specification . 25
8.1 PDU description . 25
8.1.1 Basic data types . 25
8.1.2 DLPDU abstract syntax reference . 25
8.1.3 Coding of the DLPDU field SourceAddress . 26
8.1.4 Coding of the DLPDU field DestinationAddress . 26
8.1.5 Coding of the field TagControlInformation . 27
8.1.6 Coding of the field LT . 27
8.1.7 MRP APDU abstract syntax . 27
8.1.8 Coding of the field MRP_TLVHeader . 28
8.1.9 Coding of the field MRP_Version . 29
8.1.10 Coding of the field MRP_SequenceID . 29
8.1.11 Coding of the field MRP_SA . 29
8.1.12 Coding of the field MRP_Prio . 29
8.1.13 Coding of the field MRP_PortRole . 29
8.1.14 Coding of the field MRP_RingState . 29

62439-2  IEC:2010 – 3 –
8.1.15 Coding of the field MRP_Interval . 30
8.1.16 Coding of the field MRP_Transition . 30
8.1.17 Coding of the field MRP_TimeStamp . 30
8.1.18 Coding of the field MRP_Blocked. 30
8.1.19 Coding of the field MRP_ManufacturerOUI . 31
8.1.20 Coding of the field MRP_ManufacturerData . 31
8.1.21 Coding of the field MRP_DomainUUID . 31
8.2 Protocol machines . 31
8.2.1 MRM protocol machine . 31
8.2.2 MRC protocol machine . 41
8.2.3 MRM and MRC functions . 48
8.2.4 FDB clear timer . 51
8.2.5 Topology change timer . 51
9 MRP installation, configuration and repair . 51
9.1 Ring port parameters . 51
9.2 Ring topology parameters . 52
9.3 MRM parameters . 52
9.4 MRC parameters and constraints . 52
9.5 Calculation of MRP ring recovery time . 53
9.5.1 Overview . 53
9.5.2 Deduction of formula . 53
9.5.3 Worst case calculation for recovery time of 10 ms . 55
9.5.4 Worst case calculation for 50 devices . 56
10 MRP Management Information Base (MIB) . 56
10.1 General . 56
10.2 MRP MIB with a monitoring view . 56
10.3 MRP MIB with a management and monitoring view . 64
Bibliography . 73

Figure 1 – MRP stack . 10
Figure 2 – MRP ring topology with one manager and clients . 11
Figure 3 – MRP open ring with MRM . 11
Figure 4 – MRP ring with more than one MRM .
...