User's Manual

User’s Manual of SGS-5240 Series Managed Switch
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 A high-threshold alarm or warning message is sent if the current value is greater than or equal to the threshold, and the
last sample value was less than the threshold. After a rising event has been generated, another such event will not be
generated until the sampled value has fallen below the high threshold and reaches the low threshold.
 A low-threshold alarm or warning message is sent if the current value is less than or equal to the threshold, and the last
sample value was greater than the threshold. After a falling event has been generated, another such event will not be
generated until the sampled value has risen above the low
 threshold and reaches the high threshold.
 Threshold events are triggered as described above to avoid a hysteresis effect which would continuously trigger event
messages if the power level were to fluctuate just above and below either the high threshold or the low threshold.
 Trap messages configured by this command are sent to any management station configured as an SNMP trap
manager using the Administration > SNMP (Configure Trap) page.
4.2.2.4 Cable Test
Switch Management>Interface>Cable Test page is used to test the cable attached to a port. The cable test will check for any
cable faults (short, open, etc.). If a fault is found, the switch reports the length to the fault.
Otherwise, it reports the cable length. It can be used to determine the quality of the cable, connectors, and terminations.
Problems such as opens, shorts, and cable impedance mismatch can be diagnosed with this test.
 Port – Switch port identifier.
 Type – Displays media type. (GE – Gigabit Ethernet, Other – SFP+)
 Link Status – Shows if the port link is up or down.
 Test Result – The results include common cable failures, as well as the status and approximate distance to a fault, or the
approximate cable length if no fault is found.
To ensure more accurate measurement of the length to a fault, first disable power-saving mode on the link partner before
running cable diagnostics.
For link-down ports, the reported distance to a fault is accurate to within +/- 2 meters. For link-up ports, the accuracy is +/-
10 meters.
 Last Updated – Shows the last time this port was tested.