Mrp; Mrp - Media Redundancy Protocol - Siemens SCALANCE XM-400 Configuration Manual

is redirected from one Ethernet connection (standby port of the master or standby server) to
another Ethernet connection (standby port of the slave).
Requirements
HRP
● HRP is supported in ring topologies with up to 50 devices.
Exceeding this number of devices can lead to a loss of data traffic.
● For HRP, only devices that support this function can be used in the ring.
● Devices that do not support HRP must be linked to the ring using special devices with HRP
capability. Up to the ring, this connection is not redundant.
● All devices must be interconnected via their ring ports. Multimode connections up to 3 km
and single mode connections up to 26 km between two IE switches are possible. At greater
distances, the specified reconfiguration time may be longer.
● A device in the ring must be configured as redundancy manager by selecting the "HRP
manager" setting. On all other devices in the ring, either the "HRP Client" or "Automatic
Redundancy Detection" mode must be activated.
● The standby ports must be disabled in spanning tree.
● You configure HRP in Web Based Management, Command Line Interface or using SNMP.
Standby redundancy
● With standby coupling partners HRP must be set permanently.
● The ports of the standby coupling partners must be disabled in spanning tree.
● You configure standby redundancy in Web Based Management, Command Line Interface
or using SNMP.
4.6.3

MRP

4.6.3.1

MRP - Media Redundancy Protocol

The "MRP" method conforms to the Media Redundancy Protocol (MRP) specified in the
following standard:
IEC 62439‑2 Release 1.0 (2010‑02) Industrial communication networks ‑ High availability
automation networks Part 2: Media Redundancy Protocol (MRP)
The reconfiguration time after an interruption of the ring is a maximum of 200 ms.
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
Technical basics
4.6 Redundancy mechanism
47