Lantronix SISPM1040-3166-L Installation Guide Rev G - Page 40

Lantronix SISPM1040-3xxx-L Install Guide Chapter 4 - Troubleshooting Basic Troubleshooting 1. Make sure your switch model supports the feature or function attempted; see Key Features on page 6 and check the Release Notes for your particular firmware version. 2. Verify the install process; see Chapter 2 - Installing the Switch on page 26. 3. Verify the initial switch configuration; see Chapter 3 - Initial Switch Configuration on page 38. 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 24. 7. Restore the switch to its factory default settings; see Reset Button on page 24. 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 Power Supply Specifications on page 33. 33762 Rev. G https://www.lantronix.com/ Page 40 of 48