Siemens SCALANCE XM-400 Configuration Manual page 247

● Redundancy Mode
If you select "Ring" or "Ring with RSTP"in the "Redundancy Type" drop-down list, the
following options are then available:
– Automatic Redundancy Detection
– MRP Auto-Manager
– MRP Client
– HRP Client
– HRP manager
If you select "Spanning Tree" in the "Redundancy Type" drop-down list, the following
options are then available:
– STP
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
Select this setting to create an automatic configuration of the redundancy mode.
In the "Automatic Redundancy Detection" mode, the device automatically detects
whether or not there is a device with the "HRP Manager" role in the ring. If there is, the
device adopts the role "HRP Client" client.
If no HRP manager is found, all devices with the "Automatic Redundancy Detection" or
"MRP Auto Manager" setting negotiate among themselves to establish which device
adopts the role of "MRP Manager". The device with the lowest MAC address will always
become "MRP Manager". The other devices automatically set themselves to "MRP
Client" mode.
In the "MRP Auto Manager" mode, the devices negotiate among themselves to establish
which device will adopt the role of "MRP Manager". The device with the lowest MAC
address will always become "MRP Manager". The other devices automatically set
themselves to "MRP Client" mode.
In contrast to the setting "Automatic Redundancy Detection", the devices are not capable
of detecting whether or not an HRP manager is in the ring.
Note
MRP configuration in STEP 7
If you set the role "Manager (Auto)" or "Manager" for the device in STEP 7, in both cases,
"MRP Auto Manager" is displayed on this WBM page. In the display in the CLI, a
distinction is made between the two roles.
The device adopts the role of MRP client.
The device adopts the role of HRP client.
The device adopts the role of HRP manager.
When you configure an HRP ring, one device must be set as HRP manager. For all
other devices, "HRP Client" or "Automatic Redundancy Detection" must be set.
Enabled Spanning Tree Protocol. Typical reconfiguration times with spanning tree are
between 20 and 30 seconds. You can configure other settings in "Layer 2 > Spanning
Tree".
Configuring with Web Based Management
5.5 The "Layer 2" menu
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