Siemens Industrial Ethernet Switches SCALANCE X-200 User Manual Page 188

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Configuration / diagnostics using remote mechanisms
6.3 Configuration using Web Based Management (WBM) and Command Line Interface (CLI)
SCALANCE X-200
188 Operating Instructions, 12/2011, A5E00349864-19
Maximum delay (ms) (relevant only when the redundancy role "HSR Manager" or "MRP
Manager" was adopted)
This shows how much a test frame was delayed. (Test frames are placed on the ring to
detect interruptions in the ring.) For reliable functioning of the network, values < 20 ms are
necessary.
Note
The standby function always requires an activated HSR client. If the standby manager is
"enabled", the following message appears if you attempt to disable ring redundancy or to
switch to redundancy manager:
Cannot disable "Redundancy" if "Standby Manager" is enabled.
Note
When shipped, ring ports are set as default, refer to the section "Overview of the product
characteristics", table "Overview of the connection options".
Note
Note the following when configuring an HSR ring:
If no redundancy "HSR Manager" has been specified yet, the ring must be interrupted at
one point. This avoids circulating frames.
If an MRP ring is configured, at least one device in the ring must be set to "Automatic
Redundancy Detection" mode. The role of the redundancy manager is adopted
automatically by a device with this setting.
If you reconfigure an MRP ring to create an HSR ring, open the ring while you reconfigure
the devices.
This avoids circulating frames.
NOTICE
Note the following when configuring an MRP ring:
With devices having more than 8 ports, the selection of the ring ports when using MRP
is restricted:
With SCALANCE X216 and X224, ports 1 to 8 can be selected as MRP ring ports.
With SCALANCE X212-2 and X212-2LD, ports 9 to 14 can be selected as MRP ring
ports.
The default ring ports are adapted automatically if you select MRP. Make sure that the
ring ports are set correctly.
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