D-Link DES-3216 manual Troubleshooting, Problem Solution

10/100 Auto Negotiation Switch User’s Guide

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Troubleshooting

This troubleshooting section is intended to help you solve the most common problems on the DES-3216.

The DES-3216 does not have external LED error messages. If there is an error and it 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-3216 performs a Power On Self Test (POST) every time it is
	powered on. If you are connected to the DES-3216 through Local
	Console Management during the POST you can see the results
	displayed on your monitor. The login screen appears after the DES-
	3216 has completed the POST.
	The POST checks all of the hardware components on the DES-3216.
Cables	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-3216 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-3216 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-3216 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-3216 and the port settings on the device
	you are connecting to must be the same in order for them to
	communicate. Check the speed and duplex setting on both the port and
	device you are connecting to.

Power LED is Off Check the power plug and verify that you are getting power from the wall socket. If the DES-3216 is on, the power LED is not working properly. Return the DES-3216. If the DES-3216 is not powering on

Troubleshooting 55