Siemens Industrial Ethernet Switches SCALANCE X-200 - Manual (Page 226)

Configuration / diagnostics using remote mechanisms
6.3 Configuration using Web Based Management (WBM) and Command Line Interface (CLI)
SCALANCE X-200
226
Operating Instructions, 12/2011, A5E00349864-19
Yellow:
If the link power margin enters this range, maintenance is necessary. The boundary of the
yellow area is at a link power margin of 2 dB. To ensure long-term functionality of the
system, the maintenance should be performed. If the link power margin is in the yellow
range, this is signaled by the FO LED lighting up.
NOTICE
The page for diagnostics of fiber-optic cable only shows correct link power margins when
plastic optical fiber (POF) is used. If polymer cladded fiber (PCF) is used, diagnostics is not
possible.
6.3.5.35 The "Loop Detection Config" WBM menu
Loop Detection Configuration
On this page, you specify for the ports for which loop detection will be activated. These ports
send test frames. If these frames are sent back to the device, there is a Loop.
Note
Note that the functions of the "Loop Detection Configuration" WBM menu are not available
for X200IRT.
If the frames are received again at another port of the same device, there is a "Local Loop"
involving this device.
If the sent frames are received again at the same port, there is a "Remote Loop" involving
other network components.
Note
Note that loop detection is only possible at ports that were not configured as ring ports.