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3Com 2250-SFP, 2226-SFP, 2426-PWR manual Broadcast Storm, Summary, Configuring VLANs

Models: 2426-PWR 2250-SFP 2226-SFP

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Broadcast Storm

A broadcast storm occurs when an incorrect packet is sent out on a network, causing most hosts to respond all at once and typically with wrong answers that start the process over again. Broadcast storms use substantial network bandwidth and may cause network time-outs.

Two tabs are available on the Broadcast Storm page:

■Summary

■Modify

Configuring VLANs

Summary

Use the Summary tab to display the broadcast mode and rate for all the ports.

Figure 44 Broadcast Storm Summary Screen

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3Com 2250-SFP, 2226-SFP manual Two tabs are available on the Broadcast Storm page Summary Modify, Configuring VLANs

Contents

Installation and User Guide 3CBLSF26 3CBLSF26PWR 3CBLSF50Baseline Switch 2226-SFP Plus Baseline Switch 2426-PWR Plus Baseline Switch 2250-SFP PlusEnd of Life Statement 3Com Corporation 350 Campus Drive Marlborough MAUNITED STATES GOVERNMENT LEGEND ENVIRONMENTAL STATEMENTCONTENTS T ROUBLESHOOTING Purchase Value-Added ServicesBroadcast Storm StatisticsConsole Port Getting Started with the Command Line InterfaceCLI Commands PC-AT Serial Cable Modem Cable Ethernet Port RJ-45 Pin AssignmentsPage ABOUT THIS GUIDE Baseline Switch 2226-SFP Plus 3CBLSF26Baseline Switch 2426-PWR Plus 3CBLSF26PWR Baseline Switch 2250-SFP Plus 3CBLSF50http//esupport.3Com.com Documentation CommentsProduct Registration pddtechpubscomments@3Com.comAutosensing of MDI/MDIX Connections INTRODUCING THE BASELINE SWITCHOverview of the Baseline Switch Features and CapabilitiesPower-over-Ethernet Capability Physical FeaturesGigabit Combo Ports RJ-45/SFP 1 RJ-45 10/100 Ports Front Panel3 Console Port 2 Gigabit Combo Ports RJ-45/SFPStatus 4 10/100BASE-TX Link/Activity Status LEDs5 10/100BASE-TX Duplex Status LEDs 3CBLSF26 and 3CBLSF26PWR Only 6 Gigabit Combo Port and Duplex Status LEDsSFP/Duplex SFP Mode1000BASE-T Mode Link/Activity8 Self-adhesive Pads 7 Power LED9 Power Socket Rear PanelPackage Contents Rack-Mounting or Free-Standing Supplying Power to the Switch INSTALLING THE SWITCHImportant Safety Information Important Safety Information Positioning the SwitchIstotne informacje dot. bezpieczeństwa Positioning the SwitchImportante Avviso di Sicurezza Information importante de seguridadRack-Mounting or Free-Standing Using the Mounting KitMontagesatz Anweisungen Supplying Power to the SwitchPlacing Units On Top of Each Other Meaning Reset the Switch. See “Resetting to Factory Defaults” on pageChecking for Correct Operation StatusApproved SFP Transceivers Using SFP TranceiversInserting an SFP Transceiver Removing an SFP Transceiver Performing Spot ChecksIf you experience any problems operating the Switch refer to “Troubleshooting” on pageRequirements for Accessing the Web Interface CONNECTING TO THE WEB INTERFACERequirements for Accessing the Web Interface Using the Console Command Line Interface CLIThe IP address Subnet mask and Logging On to the Web Interface Menu Navigating the Web InterfaceDescription Menu ItemNavigating the Web Interface Description Configures Radius Client settings and sets30 CHAPTER 3 CONNECTING TO THE WEB INTERFACE Menu ItemMenu Item Accessing the Switch using the 3Com Switch Detect ApplicationButtons Port StatusFigure 12 The 3Com Switch Detect Welcome Screen Running the 3Com Switch Detect ApplicationFigure 14 The 3Com Switch Detect Discovered Devices Figure 13 The 3Com Switch Detect Search ScreenAccessing the Switch using the 3Com Switch Detect Application 34 CHAPTER 3 CONNECTING TO THE WEB INTERFACE Configuring Port Settings Security Monitoring CONFIGURING THE SWITCH FROM THE WEBConfiguration Overview Device Summary Information Administration Settings Configuring VLANsPolling Interval Device ViewColor Key Administration SettingsModifying the IP Address Settings Automatic IP ConfigurationBackup Configuration IP SetupFirmware Upgrade Restore ConfigurationInitialize, keep IP setting ResetSystem Access RebootUser Summary The password can be up to 8 characters long and is case-sensitiveCreate User Remove User Modify UserThis page allows you to modify a user’s access level and password SNMP SetupSystem Name System TimeSNMP Add Configuring VLANsSNMP Remove VLAN Setup Modify VLANAvailable options on the Setup screen include Rename Modify PortPort Detail RemoveForwarding Tagged/Untagged Frames Sample VLAN ConfigurationsVLAN Detail Setting Up VLAN Across Two Switches Setting Up Two VLANs on the Same SwitchFigure 39 Tagged VLAN Configuration Spanning TreeSummary Setup Port SetupFigure 41 Spanning Tree Setup Screen IGMP Snooping & Query Choose Enabled or Disabled from the IGMP Snooping Mode drop down menuTwo tabs are available on the Broadcast Storm page Summary Modify Broadcast StormConfiguring VLANs SummaryModify QoS VoIP Traffic SettingsSummary Figure 48 QoS Port Setup Screen SetupPort Setup Figure 47 QoS VoIP Setup ScreenTelephony OUI - Input a new company identifier to add to the list OUI SummaryOUI Add Port DetailSetup PoE 3CBLSF26-PWR onlySummary Administration Configuring Port SettingsSummary Setup DetailPort State - Enables and disables the port Figure 56 Port Administration Setup Screen Speed/Duplex for 1000 Mbps ConnectionsGuidelines for Creating Trunks Link AggregationSummary CreateUse the Create tab to add ports to a group membership Figure 60 Link Aggregation Remove Screen ModifyRemove Figure 59 Link Aggregation Modify ScreenStatistics SecurityRADIUS Client Configure 802.1X SettingsSummary SetupSingle-Host Address Table MonitoringPort Summary Port MirroringSummary Two tabs are available on the Port Mirroring page Setup Remove SetupRemove Figure 69 Cable Diagnostic Summary Screen Cable DiagnosticsSummary Figure 70 Cable Diagnostic Screen DiagnosticsMonitoring 74 CHAPTER 4 CONFIGURING THE SWITCH FROM THE WEB INTERFACE Resetting to Factory Defaults 5 TROUBLESHOOTINGA link is connected, but the Link/Activity LED for the port is off Solving LED Issues4 10/100BASE-TX Link/Activity Status LEDs 7 Power LED Forgotten Static IP AddressThe Link/Activity LED is on, but network performance is poor If the Problem PersistsAll ports appear to show continual activity 78 CHAPTER 5 TROUBLESHOOTING Register Your Product Purchase Value-Added ServicesAccess Software Downloads A OBTAINING SUPPORT FOR YOUR PRODUCTContact Us Telephone Technical Support and Repairhttp//csoweb4.3com.com/contactus Country CountryAsia, Pacific Rim Telephone Technical Support and Repair Contact Ushttp//lat.3com.com/br/support/form.html CountryLatin America Telephone Technical Support and Repair CountryMaximum Power SafetyWeight Power InletPover-over-Ethernet The Baseline Switch 2426-PWR Plus has been3CBLSF26PWR Related Standards MaximumPhysical The Baseline Switch 2250-SFP Plus has been designed3CBLSF50 Related Standards Environmental86 APPENDIX B TECHNICAL INFORMATION RJ-45 SignalC PIN-OUTS Console Cablealways required Null Modem CablePC-AT Serial Cable Modem Cable1000 Ethernet Port RJ-45 Pin AssignmentsPin Number 10/10090 APPENDIX C PIN-OUTS Logging on to the CLI Getting Started with the Command Line InterfaceD 3COM CLI REFERENCE GUIDE Console PortAutomatic Logout CLI CommandsConcurrent CLI Sessions Example Default ConfigurationSyntax User GuidelinesSummary PingParameters ping IP address URL hostnameSyntax ipSetupipSetup Default ConfigurationSyntax Upgradeupgrade Default ConfigurationReboot rebootInitialize Initializelogout Passwordpassword LogoutICES Statement REGULATORY NOTICESFCC Statement Information to the UserPage 1000BASE-LX GLOSSARY10BASE-T 100BASE-TXCategory 6 Cables Category 3 CablesCategory 5 Cables Category 5e CablesIEEE 802.1D Full DuplexHalf Duplex IEEEMAC Address Power over EthernetLayer Link AggregationSubnet Mask SwitchServer Subnet Address106 GLOSSARY VLANNumbers INDEX