Chapter 46 Troubleshooting
ES3500 Series User’s Guide
336
One of the LEDs does not behave as expected.
1
Make sure you understand the normal behavior of the LED. See
2
Check the hardware connections. See
.
3
Inspect your cables for damage. Contact the vendor to replace any damaged cables.
4
Turn the Switch off and on.
5
Disconnect and re-connect the power cord to the Switch.
6
If the problem continues, contact the vendor.
A device that you expect to be powered via Ethernet doesn’t receive power over Ethernet.
1
Make sure the PoE LED for the port supplying power over Ethernet is on.
2
Make sure the Switch port has PD selected so it can supply power over Ethernet. See
3
Inspect your Ethernet cables for damage. Replace any damaged cables.
4
Check cable lengths.
5
Disconnect the device that you expect to be powered via Ethernet and make sure the Switch has
enough remaining power to supply the device before re-connecting it. See
6
Increase the priority of the port. See
A port is cabled correctly, but the port status is down.
1
Disable Green Ethernet on the port. See
for details of how to do this. If the
port comes up, then the port at the other end of the link probably doesn’t support Green Ethernet.
If the port comes up, then try disabling and re-enabling the port again.
2
Inspect your Ethernet cables for damage. Replace any damaged cables.
3
Check cable lengths.
4
Check that the device at the other end of the link is powered on.