Chapter 46 Troubleshooting
One of the LEDs does not behave as expected.

1Make sure you understand the normal behavior of the LED. See Section 3.2 on page 33.

2Check the hardware connections. See Section 3.1 on page 28.

3Inspect your cables for damage. Contact the vendor to replace any damaged cables.

4Turn the Switch off and on.

5Disconnect and re-connect the power cord to the Switch.

6If the problem continues, contact the vendor.

A device that you expect to be powered via Ethernet doesn’t receive power over Ethernet.

1Make sure the PoE LED for the port supplying power over Ethernet is on.

2Make sure the Switch port has PD selected so it can supply power over Ethernet. See Chapter 8 on page 96.

3Inspect your Ethernet cables for damage. Replace any damaged cables.4Check cable lengths.

5Disconnect 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 Chapter 8 on page 94.

6Increase the priority of the port. See Chapter 8 on page 94.A port is cabled correctly, but the port status is down.

1Disable Green Ethernet on the port. See Chapter 34 on page 266 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.

2Inspect your Ethernet cables for damage. Replace any damaged cables.3Check cable lengths.4Check that the device at the other end of the link is powered on.

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ES3500 Series User’s Guide