Hirschmann RS20 Programming Manual

Rapid Spanning Tree
108
6.7 Combination of RSTP and MRP
Redundanz L2P
Release 5.0 04/09
To combine RSTP with MRP, you perform the following steps in sequence:
X Configure MRP on all devices in the MRP-Ring.
X Activate RSTP at the RSTP ports and also at the MRP-Ring ports.
X 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”.
X Activate RSTP globally.
X Activate the MRP compatibility mode.
X 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) shows an example for the combination of RSTP and
MRP.
Parameter S1 S2 S3 S4
MRP settings
Ring redundancy: MRP version MRP MRP
Ring port 1 1.1 1.2
Ring port 2 1.1 1.2
Redundancy Manager mode On Off – –
MRP operation On On Off Off
RSTP settings
For each RSTP port: STP State Enable On On On On
Protocol Configuration: Priority
(S2<S1<S3 and S2<S1<S4)
4096 0 32768 32768
RSTP:Global: Operation On On On On
RSTP:Global: MRP compatibility On On – –

Hirschmann RS20 Specifications

General

Mounting	DIN Rail
Operating Temperature	-40°C to +70°C
Protection Class	IP30
Switching Technology	Store-and-Forward
Product Type	Industrial Ethernet Switch
Port Details	10/100 Mbps Ethernet ports
Switching Capacity	3.2 Gbps
MAC Address Table	8k
Management	Web, SNMP
Redundancy	MRP
Ports	8 or 16