Hirschmann RS20 series User manual

UM Redundancy Configuration L2E
Release 7.1 12/2011
Technical Support
[email protected]
User Manual
Redundancy Configuration
Industrial Ethernet (Gigabit) Switch
RS20/RS30/RS40, MS20/MS30, OCTOPUS

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© 2011 Hirschmann Automation and Control GmbH
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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.
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(www.beldensolutions.com).
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72654 Neckartenzlingen
Germany
Tel.: [phone]
Rel 7.1 12/2011 13.12.11

Contents
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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

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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
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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
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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
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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
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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
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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

Introduction
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1.2 Overview of
Redundancy Protocols
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1.2 Overview of
Redundancy Protocols
Note: When you are using a redundancy function, you deactivate the flow
control on the participating ports. Default setting: flow control deactivated
globally and activated on all ports.
If the flow control and the redundancy function are active at the same time,
the redundancy may not work as intended.
Redundancy
procedure
Network topology Switch-over time
RSTP Random structure typically < 1 s (STP < 30 s), up to < 30 s - depends
heavily on the number of devices
Note: Up to 79 devices possible, depending on topology and configuration. If
the default values (factory settings) are used, up to 39 devices are possible,
depending on the topology (see page 57).
HIPER-Ring Ring typically 80 ms, up to < 500 ms or < 300 ms (selectable)
- the number of switches has a minimal effect on the
switch-over time
MRP-Ring Ring typically 80 ms, up to < 500 ms or < 200 ms (selectable)
- the number of switches has a minimal effect on the
switch over time
Note: In combination with RSTP in MRP compatibility mode, up to 39 devices
are possible, depending on the configuration. If the default values (factory
settings) for RSTP are being used, up to 19 devices are possible (see page 57).
Table 2: Comparison of the redundancy procedures

Introduction
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1.2 Overview of
Redundancy Protocols
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Ring Redundancy
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2 Ring Redundancy
The concept of ring redundancy allows the construction of high-availability,
ring-shaped network structures.
With the help of the RM (Ring Manager) function, the two ends of a backbone
in a line structure can be closed to a redundant ring. The ring manager keeps
the redundant line open as long as the line structure is intact. If a segment
becomes inoperable, the ring manager immediately closes the redundant
line, and line structure is intact again.
Figure 1: Line structure
Figure 2: Redundant ring structure
RM = Ring Manager
—— main line
- - - redundant line
RM

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If a section is down, the ring structure of a
HIPER-(HIGH PERFORMANCE REDUNDANCY) Ring with up to 50
devices typically transforms back to a line structure within 80 ms (possible
settings: standard/accelerated).
MRP (Media Redundancy Protocol) Ring (IEC 62439) of up to 50 devices
typically transforms back to a line structure within 80 ms (adjustable to
max. 200 ms/500 ms).
Devices with HIPER-Ring function capability:
Within a HIPER-Ring, you can use any combination of the following
devices:
–RS1
– RS2-./.
– RS2-16M
–RS2-4R
– RS20, RS30, RS40
– RSR20, RSR30
– OCTOPUS
–MICE
–MS20,MS30
–PowerMICE
– MACH 100
– MACH 1000
– MACH 1040
– MACH 3000
– MACH 4000
Within an MRP-Ring, you can use devices that support the MRP protocol
based on IEC62439.
Note: Only one Ring Redundancy method can be enabled on one device at
any one time. When changing to another Ring Redundancy method,
deactivate the function for the time being.
Note: The following usage of the term “ring manager” instead of “redundancy
manager” makes the function easier to understand.

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2.1 Example of a HIPER-Ring
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2.1 Example of a HIPER-Ring
A network contains a backbone in a line structure with 3 devices. To increase
the redundancy reliability of the backbone, you have decided to convert the
line structure to a HIPER-Ring. You use ports 1.1 and 1.2 of the devices to
connect the lines1.
Figure 3: Example of HIPER-Ring
RM = Ring Manager
—— main line
- - - redundant line
The following example configuration describes the configuration of the ring
manager device (1). The two other devices (2 to 3) are configured in the
same way, but without activating the ring manager function. Select the
“Standard” value for the ring recovery, or leave the field empty.
1. On modular devices the 1st number of the port designation specifies the
module. The 2nd number specifies the port on the module. The specification
pattern 1.x is also used on non-modular devices for consistency.
RM
12 3
1.1 1.2 1.1 1.2 1.1 1.2

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2.1 Example of a HIPER-Ring
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Note: As an alternative to using software to configure the HIPER-Ring, with
devices RS20/30/40 and MS20/30 you can also use DIP switches to enter a
number of settings on the devices. You can also use a DIP switch to enter a
setting for whether the configuration via DIP switch or the configuration via
software has priority. The state on delivery is “Software Configuration”. You
will find details on the DIP switches in the “Installation” user manual.
Note: Configure all the devices of the HIPER-Ring individually. Before you
connect the redundant line, you must complete the configuration of all the
devices of the HIPER-Ring. You thus avoid loops during the configuration
phase.

Ring Redundancy
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2.1 Example of a HIPER-Ring
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2.1.1 Setting up and configuring the HIPER-Ring
Set up the network to meet your demands.
Configure all ports so that the transmission speed and the duplex settings
of the lines correspond to the following table:
Note: When activating the HIPER-Ring function via software or DIP
switches, the device sets the corresponding settings for the pre-defined ring
ports in the configuration table (transmission rate and mode). If you switch off
the HIPER-Ring function, the ports, which are changed back into normal
ports, keep the ring port settings. Independently of the DIP switch setting, you
can still change the port settings via the software.
Port type Bit rate Autonegotiation
(automatic
configuration)
Port setting Duplex
TX 100 Mbit/s off on 100 Mbit/s full duplex (FDX)
TX 1 Gbit/s on on -
Optical 100 Mbit/s off on 100 Mbit/s full duplex (FDX)
Optical 1 Gbit/s on on -
Optical 10 Gbit/s - on 10 Gbit/s full duplex (FDX)
Table 3: Port settings for ring ports
Select the Redundancy:Ring Redundancy dialog.
Under “Version”, select HIPER-Ring.
Define the desired ring ports 1 and 2 by making the corresponding
entries in the module and port fields. If it is not possible to enter a
module, then there is only one module in the device that is taken
over as a default.

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2.1 Example of a HIPER-Ring
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Display in “Operation” field:
–active: This port is switched on and has a link.
–inactive: This port is switched off or it has no link.
Figure 4: Ring Redundancy dialog
Activate the ring manager for this device. Do not activate the ring
manager for any other device in the HIPER-Ring.
In the “Ring Recovery” frame, select the value “Standard” (default).
Note: Settings in the “Ring Recovery” frame are only effective for
devices that you have configured as ring managers.
Click “Set” to temporarily save the entry in the configuration.

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2.1 Example of a HIPER-Ring
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Now proceed in the same way for the other two devices.
Note: If you have configured VLANS, note the VLAN configuration of the ring
ports.
In the configuration of the HIPER-Ring, you select for the ring ports
– VLAN ID 1 and “Ingress Filtering” disabled in the port table and
– VLAN membership Uin the static VLAN table.
Note: Deactivate the Spanning Tree protocol for the ports connected to the
HIPER-Ring, because Spanning Tree and Ring Redundancy affect each
other.
enable Switch to the privileged EXEC mode.
configure Switch to the Configuration mode.
hiper-ring mode ring-manager Select the HIPER-Ring ring redundancy and
define the device as ring manager.
Switch's HIPER Ring mode set to ring-manager
hiper-ring port primary 1/1 Define port 1 in module 1 as ring port 1.
HIPER Ring primary port set to 1/1
hiper-ring port secondary 1/2 Define port 2 in module 1 as ring port 2.
HIPER Ring secondary port set to 1/2
exit Switch to the privileged EXEC mode.
show hiper-ring Display the HIPER-Ring parameters.
HIPER Ring Mode of the Switch.................. ring-manager
configuration determined by.................. management
HIPER Ring Primary Port of the Switch.......... 1/1, state active
HIPER Ring Secondary Port of the Switch........ 1/2, state active
HIPER Ring Redundancy Manager State............ active
HIPER Ring Redundancy State (red. exists).. no (rm is active)
HIPER Ring Setup Info (Config. failure)........ no error
HIPER Ring Recovery Delay...................... 500ms

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2.1 Example of a HIPER-Ring
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If you used the DIP switch to activate the function of HIPER-Ring, RSTP is
automatically switched off.
Now you connect the line to the ring. To do this, you connect the 2 devices
to the ends of the line using their ring ports.
Note: If you want to use link aggregation connections in the HIPER-Ring
(PowerMICE and MACH 4000), you enter the index of the desired link
aggregation entry for the module and the port.
The displays in the “Redundancy Manager Status” frame mean:
– “Active (redundant line)”: The ring is open, which means that a data
line or a network component within the ring is down.
– “Inactive”: The ring is closed, which means that the data lines and
network components are working.
The displays in the “Information” frame mean
– “Redundancy existing”: One of the lines affected by the function may
be interrupted, with the redundant line then taking over the function
of the interrupted line.
– "Configuration failure”: The function is incorrectly configured or the
cable connections at the ring ports are improperly configured (e.g.,
not plugged into the ring ports).