D-Link DES-5016 manual Troubleshooting, Problem Solution Post Errors, Cables, Port States

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Fast Ethernet Switching System User’s Guide

6

Troubleshooting

This troubleshooting section is intended to help you solve the most common problems on the DES-5016.

The Diagnostic LED displays a code if there is a problem on the DES-5016. 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-5016 performs a Power On Self Test (POST) every time
	it is powered on. If you are connected to the DES-5016 through
	Local Console Management during the POST you can see the
	results displayed on your monitor. The login screen appears after
	the DES-5016 has completed the POST.
	The POST checks all of the hardware components on the DES-
	5016. See Table 9: Diagnostic LED for proper actions.
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-5016 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-5016 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-5016 and on the link partner to verify settings.
	See Chapter 4, LEDs, for an explanation of all LEDs.
	The port settings on the DES-5016 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 three pronged power plug and verify that you are getting power from the wall socket. If the DES-5016 is on and the power

Troubleshooting

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Contents DES-5016 Fast Ethernet Switching System User’s Guide Software Link Limited Warranty HardwareLink Offices for Registration and Warranty Service North, Central, and South AmericaEurope and Israel Copyright Statement Wichtige Sicherheitshinweise Table of Contents Page Page About This Guide AudienceOrganization Introduction FeaturesPage DES-5016TX Front PanelDES-5016TF DES-5016TFDES-5016 Rear Panel Rear PanelTelnet Management Management MethodsUpdating Firmware Local Console ManagementUnpacking the DES-5016 Installing the DES-5016Installation Options Install Feet on Bottom Desktop/ Shelf InstallationAttach Feet Attach Mounting Brackets Rack InstallationInsert into Rack Installing Optional Modules Remove Blank Bracket Insert Optional Module Power On Connecting the DES-5016 to the Network Cable SpecificationsCopper Cable Cable Diagram Fiber Optic Cable RS-232 Port PortsMDI-X Ports Fiber Optic PortsDES-5016 to DES-5016 Connection Connecting the DES-5016 to other Switches and HubsDES-5016TF LEDs LEDsStatus PowerDiagnostic CPU ModuleLED 100/10 Port TX ModuleLink ActPort TX Module LEDs Link/ Act Port FX ModuleCol Port 100BASE-FX ModuleLit Dark Gigabit Module LED Port 1000BASE-SX ModuleManaging the DES-5016 ∙ Data bits ∙ Parity None ∙ Stop bits ∙ Flow Control None Local Console ManagementTelnet Log ∙ Default User Name D-Link ∙ Default Password D-LinkHelp Message Help MessageSpacebar Panel ConventionsConsole Program System ConfigurationSwitch Port 1-8, 9-16 and Optional Module Configuration 100BASE-FX/ 1000BASE-SX Switch Port ModuleTrunking Port Management Spanning Tree ConfigurationSnmp Management Configuration Vlan Port ManagementSystem Information System Configuration MenuSystem Reset Factory Reset to Default Config ValuesHardware Revision Software UpdateBoot Prom Firmware Version System Information MenuSystem Name LAN Default GatewayMAC Address System DescriptionSystem Reset System ResetFactory Reset Factory ResetFactory Reset Confirmation System Rate Control Advantages of Store and ForwardDisadvantages of Store and Forward Disadvantages of Cut-Through Advantages of Cut-ThroughSoftware Update menu Software Update MenuTransfer Firmware Xmodem User Account Change Menu User Account ManagementCreate New User PasswordConfirm Password Access LevelPage Delete Users StatusDelete Page Change Password Old PasswordNew Password Page Switch Port Configuration Switch Port Configuration Menu StatePhysical Port State PriorityFlow Control Spanning Tree Configuration Spanning Tree Configuration MenuSTA Operation Levels Root Cost Forward Delay TimeSpanning Tree Algorithm Bridge PriorityRoot Port Root BridgeSnmp Management Configuration Snmp Community String Snmp Management Configuration MenuSnmp Manager Setting Access RightLink Change Event Snmp Trap Manager SettingAuthentication Failure Cold StartPage Vlan Port Management Vlan Port Management menu Vlan Port Management MenuTrunkGroup Create New VlanNew Vlan Name Port #Page Vlan Name Delete Vlan MenuVirtual LAN Name Modify Vlan MenuTrunking Port Management menu Trunking Port Management MenuCreate New Trunking Port New Trunking Group NameName Page Delete Trunking Port Trunking PortModify Trunking Port Modify Trunking Port Trunking Port NamePort States TroubleshootingProblem Solution Post Errors CablesPage Diagnostic LED Appendix a DES-5016 Technical Specifications Switch SpecificationsPort Specifications Page Fast Ethernet Switching System User’s Guide General EMI Fast Ethernet Switching System User’s Guide Performance Act IndexUser Name 52, 54