Troubleshooting | 3Com 2226-SFP, 2250-SFP, 2426-PWR specs

78CHAPTER 5: TROUBLESHOOTING

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3Com 2226-SFP, 2250-SFP, 2426-PWR manual Troubleshooting

Contents

Installation and User Guide 3Com Corporation 350 Campus Drive Marlborough MA Contents Snmp 3COM CLI Reference Guide Page About this Guide Conventions Documentation Comments Product Registration Autosensing of MDI/MDIX Connections Overview of the Baseline SwitchFeatures and Capabilities Autonegotiating 10/100 Mbps Ports Physical Features Power-over-Ethernet CapabilityGigabit Combo Ports RJ-45/SFP Front Panel RJ-45 10/100 Ports Gigabit Combo Ports RJ-45/SFP 10/100BASE-TX Link/Activity Status LEDs SFP Mode Power LED Rear Panel Package Contents Installing the Switch Important Safety Information Positioning the Switch Importante Avviso di Sicurezza Using the Mounting Kit Rack-Mounting or Free-Standing Supplying Power to the Switch Montagesatz AnweisungenPlacing Units On Top of Each Other Checking for Correct Operation Status Meaning Using SFP Tranceivers Approved SFP TransceiversInserting an SFP Transceiver Performing Spot Checks Removing an SFP Transceiver Refer to Troubleshooting on Requirements for Accessing the Web Interface Using the Console Command Line Interface CLI CLI Summary with Default IP Address Logging On to the Web Interface CLI Summary with Assigned IP Address Navigating the Web Interface Menu Menu Item Description Snmp Buttons Port Status Running the 3Com Switch Detect Application 3Com Switch Detect Welcome Screen 3Com Switch Detect Search Screen Connecting to the WEB Interface Configuration Overview Device Summary Information Device View Polling Interval Automatic IP Configuration Administration SettingsModifying the IP Address Settings Color Key IP Setup Backup Configuration Restore Configuration Firmware Upgrade Reboot ResetSystem Access Initialize, keep IP setting User Summary Create User Modify User Remove User Setup System NameSystem Time Configuring VLANs Snmp AddSnmp Remove Vlan Setup Screen Modify Vlan Modify Port Rename Remove Port Detail Sample Vlan Configurations Forwarding Tagged/Untagged FramesVlan Detail Setting Up Two VLANs on the Same Switch Setting Up Vlan Across Two Switches Tagged Vlan Configuration Spanning Tree Summary Spanning Tree Summary Screen Port Setup Spanning Tree Setup Screen Spanning Tree Port Setup Screen Igmp Snooping & Query Broadcast Storm Broadcast Storm Summary Screen QoS VoIP Traffic Settings Modify QoS VoIP Setup Screen OUI Summary OUI Add PoE 3CBLSF26-PWR only QoS OUI Modify Screen Configuring Port Settings Administration Port Administration Summary Screen Detail Port Administration Setup Screen Speed/Duplex for 1000 Mbps Connections Link Aggregation Guidelines for Creating Trunks Create Link Aggregation Summary Screen Use the Remove tab to delete a link aggregation group Security StatisticsRadius Client 802.1X Settings Configure 802.1X Summary Screen Monitoring Address Table Port Mirroring Port Summary Use the Setup tab to create a port mirror session Cable Diagnostics Cable Diagnostic Summary Screen Diagnostics Cable Diagnostic Screen Configuring the Switch from the WEB Interface Troubleshooting Resetting to Factory Defaults Solving LED Issues Forgotten Static IP AddressFiber cable is connected, but the Module Active LED is off If the Problem Persists Link/Activity LED is on, but network performance is poorAll ports appear to show continual activity Troubleshooting Purchase Value-Added Services Troubleshoot Online Access Software DownloadsRegister Your Product Telephone Technical Support and Repair Contact Us Country Telephone Number Latsupportanc@3com.com Physical 3CBLSF26 Related StandardsEnvironmental Electrical 3CBLSF26PWR Related Standards Physical 3CBLSF50 Related StandardsEnvironmental Electrical Appendix B Technical Information PIN-OUTS Console Cable Null Modem Cable PC-AT Serial CableModem Cable Ethernet Port RJ-45 Pin Assignments Pin Number 10/100 1000 Appendix C PIN-OUTS Getting Started with the Command Line Interface Console PortLogging on to the CLI CLI Commands Automatic LogoutConcurrent CLI Sessions Syntax Default Configuration Ping Parameters IpSetup 255.255.255.0 Upgrade Following example resets the Switch to factory defaults Initialize Password Logout Regulatory Notices 100 1000BASE-T Auto-negotiationBandwidth Category 5e Cables Category 3 CablesCategory 5 Cables Category 6 Cables Ieee 802.1D Full DuplexHalf Duplex Ieee 802.1Q Link Aggregation Power over EthernetLayer MAC Address Subnet Address SwitchServer Subnet Mask Vlan Index Numbers Index