Siemens SCALANCE XM-400 Configuration Manual page 288

Configuring with Web Based Management
5.5 The "Layer 2" menu
Description of the displayed boxes
● Standby
Click the check box to enable or disable the function.
Note
If two devices are linked by the standby function, the "Standby" function must be enabled
on both devices.
● Standby Port
Select the port to be standby port. The link to the other ring is via the standby port.
Note
Standby ports in the spanning tree
Before you enable the port as the standby port, you need to disable the port in the spanning
tree.
1. Change to the page "Layer 2 > Spanning Tree > CIST Port".
2. Disable the ports in the spanning tree you want to configure as standby ports.
The standby port is involved in the redirection of data traffic. In there are no problems, only
the standby port of the master is enabled and handles the data traffic into the connected
HRP ring or HRP bus.
If the master or the Ethernet connection (link) of one of the standby ports of the master
fails, all standby ports of the master will be disabled and all standby ports of the slave
enabled. As a result, a functioning Ethernet connection to the connected network segment
(HRP ring or HRP linear bus) is restored.
● Standby Connection Name
This name defines the master/slave device pair. Both devices must be located in the same
ring.
Here, enter the name for the standby connection. This must be identical to the name entered
on the standby partner. You can select any name to suit your purposes, however, you can
only use the name for one pair of devices in the entire network.
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SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12