Hirschmann RS20 Reference Manual page 170

Redundancy
Buttons

Button Meaning
Set Transfers the changes to the volatile memory (RAM) of the device. To
permanently save the changes, open the
dialog, select the location to save the configuration, and click "Save".
Reload Updates the fields with the values that are saved in the volatile memory
(RAM) of the device.
Help Opens the online help.
Table 109:Buttons
6.3.2 Port
Note: Deactivate the Spanning Tree protocol for the ports connected to a
HIPER-Ring, Fast HIPER-Ring, or Ring/Network coupling, because
Spanning Tree and Ring Redundancy or Ring/Network coupling affect each
other.
Activate the MRP compatibility in an MRP-Ring if you want to use RSTP and
MRP in combination.
If you combine RSTP with an MRP-Ring, you must give the devices in the
MRP-Ring a better (i.e. numerically lower) RSTP bridge priority than the
devices in the connected RSTP network. You thus help avoid a connection
interruption for devices outside the Ring.
170
6.3 Spanning Tree
Basic Settings:Load/Save
RM GUI L2E
Release 8.0 05/2013