Hirschmann RS20 series User manual
UM Redundancy Configuration L2E
Release
7.1
12/2011
Technical Support
User Manual
Redundancy Configuration
Industrial Ethernet (Gigabit) Switch
RS20/RS30/RS40, MS20/MS30, OCTOPUS
The naming of copyrighted trademarks in this manual, even when not specially indicated, should
not be taken to mean that these names may be considered as free in the sense of the trademark
and tradename protection law and hence that they may be freely used by anyone.
© 2011 Hirschmann Automation and Control GmbH
Manuals and software are protected by copyright. All rights reserved. The copying, reproduction,
translation, conversion into any electronic medium or machine scannable form is not permitted,
either in whole or in part. An exception is the preparation of a backup copy of the software for
your own use. For devices with embedded software, the end-user license agreement on the
enclosed CD applies.
The performance features described here are binding only if they have been expressly agreed
when the contract was made. This document was produced by Hirschmann Automation and
Control GmbH according to the best of the company's knowledge. Hirschmann reserves the right
to change the contents of this document without prior notice. Hirschmann can give no guarantee
in respect of the correctness or accuracy of the information in this document.
Hirschmann can accept no responsibility for damages, resulting from the use of the network
components or the associated operating software. In addition, we refer to the conditions of use
specified in the license contract.
You can get the latest version of this manual on the Internet at the Hirschmann product site
(www.beldensolutions.com).
Printed in Germany
Hirschmann Automation and Control GmbH
Stuttgarter Str. 45-51
72654 Neckartenzlingen
Germany
Tel.: +49 (0)1805 14-1538
Rel 7.1 12/2011 13.12.11
Contents
UM Redundancy Configuration L2E
Release
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Contents
About this Manual 5
Key 7
1 Introduction 9
1.1 Overview of Redundancy Topologies 10
1.2 Overview of Redundancy Protocols 11
2 Ring Redundancy 13
2.1 Example of a HIPER-Ring 15
2.1.1 Setting up and configuring the HIPER-Ring 17
2.2 Example of a MRP-Ring 21
3 Multiple Rings 27
4 Ring/Network Coupling 29
4.1 Variants of the ring/network coupling 30
4.2 Preparing a Ring/Network Coupling 32
4.2.1 Stand-by switch 32
4.2.2 One-Switch coupling 35
4.2.3 Two-Switch coupling 41
4.2.4 Two-Switch Coupling with Control Line 49
5 Spanning Tree 57
5.1 The Spanning Tree Protocol 59
5.1.1 The tasks of the STP 59
5.1.2 Bridge parameters 60
5.1.3 Bridge Identifier 60
5.1.4 Root Path Cost 61
5.1.5 Port Identifier 63
5.2 Rules for Creating the Tree Structure 64
5.2.1 Bridge information 64
5.2.2 Setting up the tree structure 64
5.3 Example of determining the root path 67
5.4 Example of manipulating the root path 69
Contents
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5.5 Example of manipulating the tree structure 71
5.6 The Rapid Spanning Tree Protocol 72
5.6.1 Port roles 72
5.6.2 Port states 74
5.6.3 Spanning Tree Priority Vector 75
5.6.4 Fast reconfiguration 76
5.6.5 Configuring the Rapid Spanning Tree 77
5.7 Combining RSTP and MRP 87
5.7.1 Application example for the combination of RSTP and
MRP 89
A Readers’ Comments 92
B Index 95
C Further Support 97
About this Manual
UM Redundancy Configuration L2E
Release
7.1
12/2011 5
About this Manual
The “Redundancy Configuration User Manual” document contains the
information you require to select the suitable redundancy procedure and
configure it.
The “Basic Configuration” user manual contains the information you need to
start operating the device. It takes you step by step from the first startup
operation through to the basic settings for operation in your environment.
The “Installation” user manual contains a device description, safety
instructions, a description of the display, and the other information that you
need to install the device.
The “Industry Protocols” user manual describes how the device is connected
by means of a communication protocol commonly used in the industry, such
as EtherNet/IP and PROFINET IO.
The “GUI” reference manual contains detailed information on using the
graphical interface to operate the individual functions of the device.
The “Command Line Interface” Reference Manual contains detailed
information on using the Command Line Interface to operate the individual
functions of the device.
About this Manual
6UM Redundancy Configuration L2E
Release
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The Industrial HiVision Network Management Software provides you with
additional options for smooth configuration and monitoring:
Simultaneous configuration of multiple devices
Graphic interface with network layout
Auto-topology discovery
Event log
Event handling
Client/server structure
Browser interface
ActiveX control for SCADA integration
SNMP/OPC gateway.
Maintenance
Hirschmann are continually working on improving and developing their
software. You should regularly check whether there is a new version of
the software that provides you with additional benefits. You will find
software information and downloads on the product pages of the
Hirschmann website.
Key
UM Redundancy Configuration L2E
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Key
The designations used in this manual have the following meanings:
Symbols used:
List
Work step
Subheading
Link Cross-reference with link
Note: A note emphasizes an important fact or draws your attention to a dependency.
Courier ASCII representation in user interface
Execution in the Graphical User Interface (Web-based Interface user interface)
Execution in the Command Line Interface user interface
WLAN access point
Router with firewall
Switch with firewall
Router
Switch
Key
8UM Redundancy Configuration L2E
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Bridge
Hub
A random computer
Configuration Computer
Server
PLC -
Programmable logic
controller
I/O -
Robot
Introduction
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1 Introduction
The device contains a range of redundancy functions:
HIPER-Ring
MRP-Ring
Ring/Network coupling
Rapid Spanning Tree Algorithm (RSTP)
Introduction
10
1.1
Overview of Redundancy
Topologies
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1.1 Overview of Redundancy
Topologies
To introduce redundancy onto layer 2 of a network, first clarify which network
topology you require. Depending on the network topology selected, you then
choose from the redundancy protocols that can be used with this network
topology.
The following topologies are possible:
The Ring Redundancy Protocol MRP has particular properties to offer:
You have the option of coupling to MRP-Rings other ring structures that
work with RSTP (see on page 87 “Combining RSTP and MRP”).
Network topology Possible redundancy
procedures
Comments
Tree structure
without loops
(cycle-free)
Only possible in
connection with
physical loops
-
Topology with 1
loop
RSTP
Ring Redundancy
Ring Redundancy procedures (HIPER-Ring, Fast
HIPER-Ring or MRP) provide shorter switching
times than RSTP.
Topology with 2
loops
RSTP
Ring Redundancy
Ring redundancy: an MRP-Ring with an RSTP-
Ring.
Topology with 3
non-nested loops
RSTP
Ring Redundancy
Ring coupling
The ring coupling provides particular support
when redundantly coupling a redundant ring to
another redundant ring, or to any structure that
only works with Hirschmann devices
Table 1: Overview of Redundancy Topologies
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