Siemens SIMATIC NET System Manual

Network structures and network configuration
2.3 Media redundancy
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
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Topology
The following figure shows a possible topology for devices in a ring with MRP.
Figure 2-9 Example of a ring topology with the MRP media redundancy protocol
The following rules apply to a ring topology with media redundancy using MRP:
● All the devices connected within the ring topology are members of the same redundancy
domain.
● One device in the ring is acting as redundancy manager.
● All other devices in the ring are redundancy clients.
Non MRP-compliant devices can be connected to the ring via a SCALANCE X switch or via
a PC with a CP capable of MRP.

Siemens SIMATIC NET Specifications

General

Category	Industrial Communication Software
Manufacturer	Siemens
Operating Systems	Windows, Linux
Protocols Supported	PROFIBUS, PROFINET, OPC UA
Compatibility	Siemens PLCs, Third-party devices with supported protocols