D-Link 3224TG Product Manual - Page 68

10/100 Auto Negotiation Switch User's Guide 6 Troubleshooting This troubleshooting section is intended to help you solve the most common problems on the DES-3224. Many problems on the DES-3224 are indicated by the Utilization LED during the powering on process. All LEDs are explained in detail in Chapter 4, LEDs. Error codes are displayed on the Utilization LED. Table 8, System Error LED Indicators, displays the meaning of the error code. If you are having a problem that is not discussed here, contact technical support. Problem Solution POST Errors Cables Port States The DES-3224 performs a Power On Self Test (POST) every time it is powered on. If you are connected to the DES-3224 through Local Console Management during the POST you can see the results displayed on your monitor. The login screen appears after the DES-3224 has completed the POST. The POST checks all of the hardware components on the DES-3224. Faulty cables are the most common source of problems on Ethernet and Fast Ethernet networks. Check the cables first if you are having any problems connecting to a device. Ethernet is more fault tolerant than Fast Ethernet. If you are moving from Ethernet to Fast Ethernet, make sure the cables are pinned out correctly. See Chapter 3, Connecting the DES-3224 to the Network, Cable Specifications, for a diagram showing the proper pin arrangement for Ethernet and Fast Ethernet. All ports on the DES-3224 have two modes: auto negotiation mode and forced mode. Ports in auto negotiation mode auto negotiate the proper speed and duplex mode. Ports in forced mode have been manually set to a particular speed and duplex mode. Check the LEDs on the DES-3224 and on the Network Interface Card to verify settings. See Chapter 4, LEDs, for an explanation of all LEDs. The port settings on the DES-3224 and the port settings on the device you are connecting to must be the same in Troubleshooting 58