Hirschmann RS20 User Manual page 88

Spanning Tree
To combine RSTP with MRP, you perform the following steps in sequence:
 Configure MRP on all devices in the MRP-Ring.

Close the redundant line in the MRP-Ring.

Activate RSTP at the RSTP ports and also at the MRP-Ring ports.
 Configure the RSTP root bridge and the RSTP backup root bridge in the
MRP-Ring:
– Set their priority.
– If you exceed the RSTP diameter specified by the preset value of Max
Age = 20, modify Max Age and Forward Delay accordingly.

Switch on RSTP globally.
 Switch on the MRP compatibility mode.

After configuring all the participating devices, connect the redundant
RSTP connection.
88
5.7 Combining RSTP and MRP
UM Redundancy Configuration L2E
Release 7.1 12/2011