Siemens Industrial Ethernet Switches SCALANCE X-200 - Manual (Page 28)

Network topologies / media redundancy
2.6 HSR
SCALANCE X-200
28
Operating Instructions, 12/2011, A5E00349864-19
2.6 HSR
The "HSR" method allows a reconfiguration time of 0.3 seconds following an interruption in
the ring.
Requirements
The following requirements must be met for problem-free operation with the HSR media
redundancy method:
● HSR is supported in ring topologies with up to 50 devices. Exceeding this number of
devices can lead to a loss of data traffic.
● The ring in which you want to use HSR may only consist of devices that support this
function. This applies, for example, to the following devices: X-400 IE switches, X-300
IE switches, X-200 IE switches and OSM / ESM.
● All devices must be interconnected via their ring ports.
● A device in the ring must be configured as redundancy manager by selecting the "HSR
Manager" setting. You can do this with the button on the front of the device, Web Based
Management, CLI or SNMP.
● On all other devices in the ring, either the "HSR Client" or "Automatic Redundancy
Detection" mode must be activated.
You can do this with Web Based Management, CLI or SNMP.
● In the basic status, the "HSR Client" or "Automatic Redundancy Detection" mode is set as
default.