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3Com DUA1770-0AAA04 manual Ports cross-over

Models: DUA1770-0AAA04

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16CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES

100/1000BASE-T and The 100BASE-TX/1000BASE-T and 10BASE-T/100BASE-TX/1000BASE-T 10/100/1000BASE-Tports have RJ-45 connectors and are configured as Auto MDIX

Ports (cross-over).

The default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes of a link are automatically detected to provide the highest available bandwidth with the link partner.

Alternatively, auto-negotiation can be disabled. These ports can be manually configured to 10 Mbps half duplex (if supported), 100 Mbps half duplex, 10 Mbps full duplex (if supported), or 100 Mbps full duplex. It is not possible to manually configure a 1000BASE-T link as auto-negotiation is mandatory in the 1000BASE-T standard.

The maximum segment length is 100 m (328 ft) over Category 5 twisted pair cable.

1000BASE-T operation only supports full-duplex mode.

10BASE-T (10 Mbps) is only supported on Switch 4924 and 4950.

1000BASE-SX Ports The default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes are negotiated. As the speed and duplex modes are fixed by the media type, only the flow control is negotiated with the link partner. Alternatively, auto-negotiation can be disabled and the flow control setting can be manually configured.

1000BASE-SX ports do not support auto-negotiation of speed and only support full duplex mode.

GBIC Ports GBIC ports support fiber Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul (LH70) GBIC transceivers in any combination. This offers you the flexibility of using GBIC transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high capacity aggregated link backbone connection.

The default state for these ports is auto-negotiation enabled, where the speed, duplex and flow control modes are negotiated. As the speed and duplex modes are fixed by the media type, only the flow control is negotiated with the link partner. Alternatively, auto-negotiation can be disabled and the flow control setting can be manually configured.

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3Com DUA1770-0AAA04 manual Ports cross-over

Contents

Switch 4900 Series Getting Started Guide Switch 4900 3C17700 Switch 4900 SX 3C17702 Switch 4924 3C17701Switch 4950 3C17706 SuperStackUNITED STATES GOVERNMENT LEGEND ENVIRONMENTAL STATEMENTEnd of Life Statement Regulated Materials StatementCONTENTS 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES2 INSTALLING THE SWITCH ABOUT THIS GUIDEChoosing the Correct Fiber Cables 3 SETTING UP FOR MANAGEMENTSNMP Management PROBLEM SOLVING SAFETY INFORMATIONC TECHNICAL SPECIFICATIONS D TECHNICAL SUPPORT PIN-OUTSPage ABOUT THIS GUIDE Conventions CommandsNotice Icons Table 2 Text ConventionsDocumentation RelatedDocumentation documentation Product RegistrationDocumentation CommentsAbout the Switches Summary of Hardware Features Switch - Front View Detail 100/1000BASE-T and 10/100/1000BASE-T Ports1000BASE-SX Ports GBIC Ports LEDs Switch - Rear View Detail Unit Information Label Power Socket Redundant Power System Socket12 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES Hardware Features Switches Table 3 Hardware featuresSwitch - Front View Detail Figure 1 Switch 4900 - front viewFigure 2 Switch 4900 SX - front view 14 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIESFigure 3 Switch 4924 - front view Figure 4 Switch 4950 - front view Switch - Front View DetailPorts cross-over Power/Self Test LED Table 4 LED behaviorColor IndicatesSwitch - Rear View DetailFigure 5 Switch 4900 - rear view Figure 6 Switch 4900 SX - rear viewPower Socket supported by your Switch Default Settingsthe Switch units, it is returned to these defaults INSTALLING THE SWITCH Package Contents Choosing a Suitable Site Rack-mountingThe Power-up Sequence Switch 4950 - GBIC Operation Placing Units On Top of Each Other Creating an XRN Distributed FabricChoosing a Suitable Package ContentsSite Rack-mounting 4 Repeat steps 2 and 3 for the other side of the Switch The maximum number of Switch units that can be interconnected is two The Power-up Powering-up theSwitch SequenceIf there is evidence of a problem, see “Solving Problems Indicated by Fiber Cables Switch 4950 - GBIC OperationApproved GBIC TransceiversFiber SC connector Type 4 GBIC with internal EEPROM fitted 3 The transceiver connects to the network using a duplex SC connector. Attach a male duplex SC connector on the network cable into the duplex SC connector on the transceiver 32 CHAPTER 2 INSTALLING THE SWITCH SETTING UP FOR MANAGEMENT Setting Up Overview Manually Configuring IP InformationViewing Automatically Configured IP Information Methods of Managing a SwitchSetting Up Overviewwhole setup process is summarised in Figure 12. Detailed procedural Figure 12 Initial Switch Setup and Management Flow diagramManual IP Configuration Automatic IP Configurationon page You should use the automatic IP configuration method ifManually Configuring IP Information Pre-requisitesConnecting the Workstation to the Switch Configuring the Workstation with IP InformationSetting Up the Switch with IP Information IP addressUsing Command Line Interface via Telnet Figure 14 Example top-level command line interface menu Pre-requisitesConnecting the Workstation to the Switch You can find pin-out diagrams for both cables in Appendix B on pageFigure 15 Connecting a workstation to the Switch via the console port Figure 16 Example top-level command line interface menu Setting Up the Switch with IP Information42 CHAPTER 3 SETTING UP FOR MANAGEMENT Configured IP ViewingAutomatically Information44 CHAPTER 3 SETTING UP FOR MANAGEMENT Connecting the Workstation to the SwitchPre-requisites Viewing IP Information via the Console Port Figure 18 Example top-level command line interface menu 46 CHAPTER 3 SETTING UP FOR MANAGEMENTRefer to “Setting Up Command Line Interface Management” on page Refer to “Setting Up Web Interface Management” on pageCommand Line Refer to “Setting Up SNMP Management” on pageusing Telnet InterfaceSetting Up Web described in “Setting Up Overview” on pagetelnet Choosing a BrowserOver the Network http//xxx.xxx.xxx.xxx50 CHAPTER 3 SETTING UP FOR MANAGEMENT c\ pingSetting Up SNMP Default Users andPasswords system management snmp community command - refer to theThe security device user modify command on the CLI, or You can change the default passwords using eitherThe gettingStarted command on the CLI, or Default UsersSolving Problems Indicated by LEDs Solving Hardware Problems PROBLEM SOLVINGSolving Communication Problems Solving Software Upgrade Problems Solving Problems solutions belowThe Power LED does not light On powering-up, the Power/Self Test LED lights yellowSolving Hardware ProblemsA fan failure warning message is received Error message indicating that the GBIC transceiver is faulty Error message indicating that the GBIC transceiver is invalidUnit fails, no SNMP fan failure message is received Solving Communication Problems IP AddressingHow do you obtain a registered IP Address? SAFETY INFORMATION Important Safety Information Important Safety Information 62 APPENDIX A SAFETY INFORMATION L’information de Sécurité Importante AVERTISSEMENT France et Pérou uniquement 3CGBIC91 GBIC SX 3CGBIC92 GBIC LX 3CGBIC97 GBIC LH70 Wichtige Sicherheitsinformationen VORSICHT EuropeWichtige Sicherheitsinformationen 68 APPENDIX A SAFETY INFORMATION B PIN-OUTS PC-AT Serial CableModem Cable RJ-45 PinAssignments Pin assignments are identical for 10/100BASE-T and 1000BASE-T RJ-45Table 11 Pin assignments Pin Number10/100BASE-T 1000BASE-T72 APPENDIX B PIN-OUTS TECHNICAL SPECIFICATIONS Switch 4900 SX Height 65.8 mm 2.59 in. x Width 440 mm 17.3 in413 mm 16.27 in. not including bulge. Weight 6.4 Kg 14.10 lbs 413 mm 16.27 in. not including bulge. Weight 6.91 Kg 15.23 lbsPower Supply Protocols Used for AdministrationHeat Dissipation Standards SupportedServices ServicesOnline Technical World Wide Web SiteUsername anonymous Asia, Pacific Rim Europe, Middle East and AfricaLatin America aprtechnicalsupport@3com.comCountry Telephone NumberCountry Telephone NumberReturning Products for Repair Country Telephone NumberCountry Telephone NumberINDEX NumbersPage How to Identify and Resolve Radio-TV Interference Problems REGULATORY NOTICESFCC STATEMENT INFORMATION TO THE USER