D-Link DES-5200 manual Troubleshooting

Fast Ethernet Switching System User’s Guide

7

Troubleshooting

This troubleshooting section is intended to help you solve the most common problems on the DES-5200.

The Diagnostic LED displays a code if there is a problem. If an error cannot be resolved by implementing the solutions in this section, contact D-Link Technical Support.

All LEDs are explained in detail in Chapter 4, LEDs. If you are having a problem that is not discussed here, contact technical support.

Problem	Solution
POST Errors	The DES-5200 performs a Power On Self Test (POST)
	every time it is powered on. If you are connected to the
	DES-5200 through Local Console Management during the
	POST you can see the results displayed on your monitor.
	The login panel appears after the DES-5200 has completed
	the POST.
	The POST checks all of the hardware components on the
	DES-5200. See Diagnostic LED. If the module fails the
	POST, see Table 16: Modular Status Error LED Indicator
	Chart.
Cables	Faulty cable is the most common source of problems on
	Ethernet and Fast Ethernet networks. Check the cable 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-5200 to the Network, Cable Specifications, for a
	diagram showing the proper pin arrangement for Ethernet
	and Fast Ethernet.
Port States	All ports on the DES-5200 have two modes: auto
	negotiation 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-5200
	and on the link partner to verify settings. See Chapter 4,
	LEDs, for an explanation of all LEDs.
	The port settings on the DES-5200 and the port settings on
	the device you are connecting to must be the same in order

Troubleshooting 125