Siemens SCALANCE X-300 Configuration Manual page 21

Topology
The following schematic shows a possible topology for devices in a ring with MRP.
Figure 2-2
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 1616.
SCALANCE X-300 / X-400
Configuration Manual, 10/2014, C79000-G8976-C187-22
Example of a ring topology with the MRP media redundancy protocol
Network management for industrial networks
2.3 Options of media redundancy
21