LevelOne GEL-5261, User Manual

Page: 113 / 570

Chapter 4
| Interface Configuration
Port Configuration
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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.
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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.
Web Interface
To configure threshold values for optical transceivers:
1.
Click Interface, Port, Transceiver.
2.
Select a port from the scroll-down list.
3.
Set the switch to send a trap based on default or manual settings.
4.
Set alarm and warning thresholds if manual configuration is used.
5.
Click Apply.
Figure 41: Configuring Transceiver Thresholds
Performing Cable
Diagnostics
Use the Interface > Port > Cable Test page 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.
Command Usage
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Cable diagnostics are performed using Time Domain Reflectometry (TDR).
TDR detects a cable fault by sending a signal through the cable and reading the
signal that is reflected back. TDR can only determine if a link is valid or faulty.