Hirschmann RS20 Reference Manual page 161

Redundancy
Note: If you are operating the Ring Manager and two-Switch coupling
functions at the same time, there is the possibility of creating a loop.
Note: The Ring/Network coupling operates with test packets (Layer 2
frames). The devices subscribed always send their test packets VLAN-
tagged, including the VLAN ID 1 and the highest VLAN priority 7. This also
applies if the send port is an untagged member in VLAN 1.
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.
Delete Coupling Removes the coupling configuration.
configuration
Help Opens the online help.
Table 103:Buttons
RM GUI L2E
Release 8.0 05/2013
6.2 Ring/Network Coupling
Basic Settings:Load/Save
161