LevelOne GSW-2491TXM Incorrect connections, Faulty or loose cables, Non-standard cables

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6. Troubleshooting

This section is intended to help you solve the most common problems on the LevelOne GSW-2491TXM.

Incorrect connections

The switch port can auto detect straight or crossover cable when you link switch with other Ethernet device. For the RJ-45 connector should use correct UTP or STP cable, 10/100Mbps port use 2 pairs twisted cable and Gigabit 1000T port use 4 pairs twisted cable. If the RJ-45 connector is not correct pin on right position then the link will fail. For fiber connection, please notice that fiber cable mode and fiber module should be match.

Faulty or loose cables

Look for loose or obviously faulty connections. If they appear to be OK, make sure the connections are snug. IF that does not correct the problem, try a different cable.

Non-standard cables

Non-standard and miss-wired cables may cause numerous network collisions and other network problem, and can seriously impair network performance. A category 5 cable tester is a recommended tool for every 100Base-T network installation.

Improper Network Topologies

It is important to make sure that you have a valid network topology. Common topology faults include excessive cable length and too many repeaters (hubs) between end nodes. In addition, you should make sure that your network topology contains no data path loops. Between any two ends nodes, there should be only one active cabling path

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Contents GSW-2491TXM Page Contents STP Snmp Lacp IGMP/GVRP 101 Page Introduction Management FeaturesSoftware Features Software UpgradeQOS Policy Class of ServicePort Trunk Spanning TreePackage Contents Ethernet Switching Technology Front Panel Physical DimensionRear Panel LED IndicatorsAttaching Rubber Feet Desktop InstallationAttach mounting brackets with screws Rack-mounted InstallationMount the switch in an EIA standard 19-inch Rack Power OnSmall Workgroup Network ApplicationSmall Workgroup Application Segment BridgeStacking Workgroup Stackable switch Master Connecting to the SwitchConsole Management Login in the Console InterfaceMain Menu Main MenuConsole Menu Line Control Key description Port Status Status and CountersPort Counters System Information Administration Configuration Switch Static ConfigurationDevice Information IP ConfigurationUser Name Configuration Password Configuration Port ConfigurationTrunk Configuration Port Mirroring Configuration Port Mirroring interface — Vlan ID Port VID 1~255 Type the Pvid Vlan ConfigurationVlan Configure Create Vlan Group „ Create Port-Based Vlan „ Create 802.1Q Vlan Edit / Delete Vlan Group Group Sorted Mode Priority Configuration MAC Address Configuration „ Edit static MAC address Static MAC Address „ Add the Static MAC Address„ Add the Filtering MAC Address „ Delete static MAC addressFiltering MAC Address „ Delete Filtering MAC address Misc Configuration„ Edit Filtering MAC address „ IFG compensation Disable or Enable Misc Configuration interface STP Protocol Related ConfigurationForward Delay Time forward delay time STP SetupSystem Configuration Per Port Setting Snmp Community Strings „ Add Community Strings Snmp System Options„ Delete Community Name „ Edit Community Name„ Add the trap manager Trap Managers„ Delete Trap Manager Select Delete LacpWorking Ports Setting Lacp State Activity Group Status IGMP/GVRP802.1x 802.1x Setup802.1x Setup interface Per Port Configuration Misc Configuration Factory Default System Reset ConfigurationUpdate Firmware System RebootTftp Configuration Tftp Restore Configuration Tftp Backup Configuration Modem Upgrade Page Preparing for Web Management About Web-based ManagementOnline Help System LoginPort status View the Port Information Port StatisticsAdministrator function, it provides the following functions AdministratorIP Address Switch Setting„ MAC Address Table Entry Basic Switch SettingsAdvanced Setting Default is 300 seconds Miscellaneous Setting „ Igmp Theory of Operation Page Port Controls Console Port InformationTrunking Aggregator setting Aggregator Information State Activity Aggregator InformationTrunking State Activity interface Igmp Snooping Forwarding and FilteringStatic MAC Address MAC filtering Vlan configuration Port-based Vlan Vlan PortBase interface 802.1Q Vlan „ Basic Acceptable Frame type Spanning Tree „ Forward Delay Time forward delay time System ConfigurationPer Port Configuration Port Mirroring Prot Mirroring interface „ System Options Snmp Management„ Trap Manager Security Manager„ Community strings 802.1X 802.1x Configuration Per Port Configuration Tftp Update Firmware Tftp Restore Configuration Configuration Backup„ Default IP address „ Default Gateway „ Subnet mask Factory DefaultTftp Backup Configuration Backup File Name fill the file nameIP Stacking System RebootPanel List IP Stacking interface IP Stacking master switch configure finished interface IP Stacking Finished configuring interface „ Improper Network Topologies „ Faulty or loose cablesIncorrect connections „ Non-standard cables„ Cabling Diagnosing LED IndicatorsStandard Switch architectureLED Indicators ConnectorMAC address DimensionsPower Supply Safety