Technical basics
4.4 Redundancy mechanism
SCALANCE XB-200 Web Based Management
Configuration Manual, 04/2015, C79000-G8976-C360-02
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If you want to configure a single MRP ring, leave the factory setting "mrpdomain 1" in the
"Domain" drop-down list.
All devices configured in a ring with MRP must belong to the same redundancy domain. A
device cannot belong to more than one redundancy domain.
If you leave the setting for "Domain" as the factory set "mrpdomain-1", the defaults for "Role"
and "Ring ports" also remain active.
If you configure multiple MRP rings, the nodes of the ring will be assigned to the individual
rings with the "Domain" parameter.
Set the same domain for all devices within a ring. Set different domains for different rings.
Devices that do not belong to the same ring must have different domains.
The choice of role depends on the following use cases.
● You want to use MRP in a topology with
only with Siemens devices and without
monitoring diagnostic interrupts:
Assign all devices to the "mrpdomain-1" domain and the role "Manager (Auto)".
The device that actually takes over the role of redundancy manager, is negotiated by
Siemens devices automatically.
● You want to use MRP in a topology with
only with Siemens devices and
without monitoring diagnostic interrupts (MRP multiple rings):
– Assign the device that connects the rings the role of "Manager".
– For all other devices in the ring topology, select the role of "Client".
● You want to use MRP in a ring topology that also includes non-Siemens devices or you
want to receive diagnostic interrupts relating to the MRP status from a device (see
"Diagnostic interrupts"):
– Assign precisely one device in the ring the role of "Manager (Auto)".
– For all other devices in the ring topology, select the role of "Client".
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