PoE troubleshooting suggestions
Here are some tips for correcting PoE problems that might occur:
•
Make sure that the PoE Max LED is off. If the PoE Max LED is solid yellow, disconnect
one or more PoE devices to prevent PoE oversubscription. Start by disconnecting
the device from the highest-numbered port.
•
Make sure that the Ethernet cables are plugged in correctly. For each powered
device (PD) that is connected to the switch, the right port LED on the switch lights
solid green. If the right port LED lights solid yellow, a PoE fault occurred and PoE
halted because of one of the conditions that are listed in the following table.
Table 5. PoE fault conditions and possible solutions
Possible Solution
PoE Fault Condition
The problem is most likely with the
attached PD. Check the condition
of the PD or restart the PD by
disconnecting and reconnecting
the PD.
A PoE-related short circuit occurred on the port.
The PoE power demand of the PD exceeded the maximum level that the
switch permits. The maximum level is 15.4W for a PoE connection, 30W
for a PoE+ connection, and 60W for a PoE++ connection.
The PoE current on the port exceeded the classification limit of the PD.
Restart the switch to see if the
condition resolves itself.
The PoE voltage of the port is outside the range that the switch permits.
Hardware Installation Guide
29
Troubleshooting
8-port Ultra60 PoE++ Multi-Gigabit (2.5G) Ethernet Plus Switch MS108EUP