Link Check - Siemens SCALANCE XM-400 Configuration Manual
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- Configuration manual (960 pages) ,
- Operating instructions manual (80 pages) ,
- Instructions manual (60 pages)
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Configuring with Web Based Management
5.5 The "Layer 2" menu
5.5.9.3
Link Check
Requirements
● You cannot enable Link Check on ports with 10 Gbps.
● You can only enable the Link Check function with optical ring ports of an HRP or MRP ring.
Note
Replacing: media modules: Optical → electrical
If you run Link Check on an optical port of a media module, not the following:
● Link Check is activated on the optical port of a media module.
● You want to replace the media module with a module without optical ports.
1. Disable the link check on the ports of the inserted module.
2. Replace the media module.
● Link Check must be enabled on two neighboring devices (connection partners) within an
HRP or MRP ring.
● The ring ports on which you enable Link Check must be connected.
Monitoring optical connections in the ring
With the Link Check function, you can monitor the transmission quality of optical sections within
an HRP or MRP ring, identify disturbed connections and under certain conditions turn them
off. When the disturbed section is turned off, the redundancy manager can close the ring and
restore communication.
NOTICE
Make sure that the frames used by Link Check for monitoring the optical connections are not
supplanted by an overload of high priority frames in the network.
An overload of high priority frames can, for example, be caused by the following:
● Network loops that can cause duplication of the high priority frames
● Changing the priorities for forwarding frames
Note
Enable Link Check on only one of two connection partners This can lead to incorrect behavior.
Note
If Link Check is enabled on all devices of a ring at the same time, and several connections
within the ring have problems, this leads to fragmentation of the ring.
1. During commissioning enable the Link Check function for one connection section after the
other by enabling Link Check for the two connection partners connected to a line.
2. To ensure an error-free connection, wait 1 min. before you enable Link Check for the next
connection.
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SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
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