Lantronix SISPM1040-582-LRT Installation Guide Rev H PDF 1.61 MB - Page 35

Lantronix SISPM1040-582-LRT Install Guide 5 Troubleshooting, Support, and Compliance Troubleshooting This section provides steps to troubleshoot problems by taking actions based on the suggested solutions. General Troubleshooting Most problems are caused by the following situations. Check for these items first when starting troubleshooting: 1. Make sure your switch model supports the feature or function attempted; see Key Features on page 5. 2. Verify the install process; see chapter 3. Installation on page 18. 3. Troubleshoot connected network devices to pinpoint the problem to the switch. 4. Connecting to devices that have a fixed full- duplex configuration. Make sure all devices connected to the Switch devices are configured to auto negotiate or are configured to connect at half duplex. 5. Faulty or loose cables. Look for loose or obviously faulty connections. If they appear to be OK, make sure the connections are snug. If that does not correct the problem, try a different cable. 6. Non-standard cables. Non-standard and miswired cables may cause network collisions and other network problems and can seriously impair network performance. Use a new correctly-wired cable. A cable tester is a recommended tool for every Ethernet network installation. 7. Improper Network Topologies. Make sure you have a valid network topology. If you no longer experience the problems, the new topology is probably at fault. Also, make sure your network topology contains no data path loops. 8. Check the port configuration. A port on your Switch may not be operating as you expect because it has been put into a "blocking" state by Spanning Tree, GVRP (automatic VLANs), or LACP (automatic trunking). Note that the normal operation of the Spanning Tree, GVRP, and LACP features may put the port in a blocking state. Make sure the port was not configured as disabled via software. 9. SYS LED is Off. Check connections between the switch, the power cord and the wall outlet. Contact Tech Support for assistance. See LED Troubleshooting below. 10. Link LED is Off. Verify that the switch and attached device are powered on. Be sure the cable is plugged into the switch and corresponding device. If the switch is installed in a rack, check the connections to the punchdown block and patch panel. Verify that the proper cable type is used, and its length does not exceed specified limits. Check the adapter on the attached device and cable connections for possible defects. Replace the defective adapter or cable if necessary. 11. For PD power up failures or power cycling, verify that the power supply is set to Vout of 56 VDS. See Connecting Powered Devices (PDs) on page 25. 12. Contact Tech Support for assistance. 33755 Rev. H https://www.lantronix.com/ Page 35 of 51