Lantronix
SISPM1040-3xxx-L Install Guide
33762 Rev. G
Page
40
of
48
Chapter 4 - Troubleshooting
Basic Troubleshooting
1.
Make sure your switch model supports the feature or function attempted; see
on page
check the Release Notes for your particular firmware version.
2.
Verify the install process; see
Chapter 2 – Installing the Switch
3.
Verify the initial switch configuration; see
Chapter 3 - Initial Switch Configuration on
4.
Troubleshoot connected network devices to pinpoint the problem to the switch.
5.
Run the System Diagnostics. See the
Web User Guide
or the
CLI Reference
.
6.
Reset the switch; see
Reset Button
on page
7.
Restore the switch to its factory default settings; see
Reset Button
on page
8.
If using the CLI, try configuring / testing via the Web UI and vice versa. See the
Web User Guide
or
the CLI
Reference.
Troubleshooting PoE Problems
1.
Note that PoE devices initially draw more power during their boot up sequence than during normal operation.
2.
Turn LLDP off and turn CDP on.
3.
Verify that PoE capability is enabled for the interface.
4.
Make sure the cable is properly seated in the port socket.
5.
Ensure that you have the right and qualified Cat 5 or above Ethernet cable plugged into the right port on the
PD, and that the length of the Ethernet cable is not over 100m.
6.
Confirm the power supply mode (Alternative A vs. Alternative B) with the PD vendor. Note that PoE support
requires both the AC and DC power supplies.
7.
For PD power up failures or power cycling, verify that the power supply is set to Vout of 56 V. See