D-Link DES-5024 manual Troubleshooting, ProblemSolution

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Fast Ethernet Switching System User’s Guide

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Troubleshooting

This troubleshooting section is intended to help you solve the most common problems on the DES-5024.

The Diagnostic LED displays a code if there is a problem on the DES-5024. 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.

ProblemSolution

POST Errors The DES-5024 performs a Power On Self Test (POST) every time it is powered on. If you are connected to the DES-5024 through Local Console Management during the POST you can see the results displayed on your monitor. The login screen appears after the DES-5024 has completed the POST.

The POST checks all of the hardware components on the DES-5024. See Table 8: 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-5024 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-5024 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-5024 and on the link partner to verify settings. See Chapter 4, LEDs, for an explanation of all LEDs.

The port settings on the DES-5024 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-5024 is on and the power LED is not working properly return the DES-5024. If the DES-

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Contents DES-5024 Fast Ethernet Switching System User’s Guide Link Limited Warranty Hardware North, Central, and South America Copyright Statement Wichtige Sicherheitshinweise Table of Contents Page Page Audience About This GuideOrganization Introduction FeaturesPage DES-5024 Front Panel Front PanelDES-5024 Rear Panel Rear PanelUpdating Firmware Management MethodsLocal Console Management Telnet ManagementUnpacking the DES-5024 Installing the DES-5024Installation Options Install Feet on Bottom Desktop/ Shelf InstallationAttach Feet Rack Installation Attach Mounting Brackets Insert into Rack Installing Modules Remove Blank Bracket Insert Optional Module Power On Cable Specifications Connecting the DES-5024 to the NetworkCopper Cable Cable Diagram Fiber Optic Cable MDI-X Ports PortsFiber Optic Ports RS-232 PortDES-5024 to DES-5024 Connection Connecting the DES-5024 to other Switches and HubsDES-5024 LEDs LEDsCPU Module PowerLED Link Port 10/100-TX ModuleCol Port 100BASE-FX ModuleLit Dark Act Port 1000BASE-SX ModuleManaging the DES-5024 ∙ 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 ConfigurationUser Account Management Spanning Tree Configuration 100BASE-FX/ 1000BASE-SX Switch Port ModuleSnmp Management Configuration Vlan Port ManagementSystem Reset System Configuration MenuFactory Reset to Default Config Values System InformationBoot Prom Firmware Version Software UpdateSystem Information Menu Hardware RevisionMAC Address LAN Default GatewaySystem Description System NameSystem Reset System ResetFactory Reset Factory ResetFactory Reset confirmation Advantages of Store and Forward System Rate ControlDisadvantages 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 ManagementConfirm Password PasswordAccess Level Create New UserPage Status Delete UsersDelete Page Old Password Change PasswordNew Password Page Switch Port Configuration State Switch Port Configuration MenuPhysical Priority Port StateFlow Control Spanning Tree Configuration Menu Spanning Tree ConfigurationSTA Operation Levels Spanning Tree Algorithm Forward Delay TimeBridge Priority Root CostRoot Port Root BridgeSnmp Management Configuration Snmp Manager Setting Snmp Management Configuration MenuAccess Right Snmp Community StringAuthentication Failure Snmp Trap Manager SettingCold Start Link Change EventPage Vlan Port Management Vlan Port Management menu Vlan Port Management MenuNew Vlan Name Create New VlanPort # TrunkGroupPage Vlan Name Delete Vlan MenuVirtual LAN Name Modify Vlan MenuTrunking Port Management menu Trunking Port Management MenuNew Trunking Group Name Create New Trunking PortName Page Trunking Port Delete Trunking PortModify Trunking Port Modify Trunking Port Trunking Port NameProblemSolution TroubleshootingPage Diagnostic LED Switch Specifications Appendix a DES-5024 Technical SpecificationsPort Specifications 10BASE-T EMI Fast Ethernet Switching System User’s Guide Performance Index Access LevelUser Name 50, 52