Application Example For The Combination Of Rstp And Mrp - Hirschmann RS20 Programming Manual

Rapid Spanning Tree
To combine RSTP with MRP, you perform the following steps in sequence:
Configure MRP on all devices 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 the priority.
– If you exceed the RSTP diameter specified by the preset value of
Max Age = 20, you modify "Max Age" and "Forward Delay".
Activate RSTP globally.
Activate the MRP compatibility mode.
After configuring all the participating devices, connect the redundant
RSTP connection.
6.7.1 Application example for the combination of
RSTP and MRP
The figure (see fig. 56)
MRP.
Parameter
MRP settings
Ring redundancy: MRP version
Ring port 1
Ring port 2
Redundancy Manager mode
MRP operation
RSTP settings
For each RSTP port: STP State Enable
Protocol Configuration: Priority
(S2<S1<S3 and S2<S1<S4)
RSTP:Global: Operation
RSTP:Global: MRP compatibility
108
6.7 Combination of RSTP and MRP
shows an example for the combination of RSTP and
S1 S2 S3
MRP MRP
1.1 1.2
1.1 1.2
On Off –
On On Off
On On On
4096 0 32768 32768
On On On
On On –
S4
–
Off
On
On
–
Redundanz L2P
Release 5.0 04/09