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3Com DUA1770-0AAA04 manual If there is evidence of a problem, see “Solving Problems Indicated by

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Page 27

The Power-up Sequence 27

If there is evidence of a problem, see “Solving Problems Indicated by

LEDs” on page 54 for a list of suggested solutions.

Connecting a You can connect a SuperStack 3 Advanced Redundant Power System to Redundant Power the Switch. This unit, which is also known as an RPS, is designed to

System maintain the power to your Switch if a power supply failure occurs.

For normal redundancy, the unit requires one Type 3 Power Module (part number 3C16075).

For full redundancy, the unit requires two Type 3 Power Modules combined using a Type 3 Y-Cable (part number 3C16077).

WARNING: If you are connecting the Switch to a Type 3 Power Module, read the Safety Information section in the Type 3 Power Module User Guide.

CAUTION: The Switch can only use a SuperStack Advanced Redundant

Power System output.

CAUTION: The Switch has no ON/OFF switch; the only method of connecting or disconnecting mains power is by connecting or disconnecting the power cord.

Choosing the Correct If your Switch has 10/100/1000BASE-T ports, these ports are Auto-MDIX, 10/100/1000BASE-Tthat is they have a cross-over capability. These ports can automatically

Cables detect whether to operate in MDI or MDIX mode. Therefore you can make a connection to one of the ports with a straight-through (MDI) or a cross-over cable (MDIX).

The Auto-MDIX feature only operates when auto-negotiation is enabled.

If auto-negotiation is disabled, all the Switch ports are configured as MDIX (cross-over). If you want to make a connection to another MDIX port, you need a cross-overcable. Many ports on workstations and servers are configured as MDI (straight-through). If you want to make a connection to an MDI port, you need to use a standard straight-throughcable. See Table 7.

3Com recommends that you use at least Category 5 twisted pair cable — the maximum segment length for this type of cable is 100 m (328 ft).

Image 27

3Com DUA1770-0AAA04 manual If there is evidence of a problem, see “Solving Problems Indicated by

Contents

SuperStack Switch 4900 Series Getting Started GuideSwitch 4900 3C17700 Switch 4900 SX 3C17702 Switch 4924 3C17701 Switch 4950 3C17706Regulated Materials Statement UNITED STATES GOVERNMENT LEGENDENVIRONMENTAL STATEMENT End of Life StatementABOUT THIS GUIDE CONTENTS1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES 2 INSTALLING THE SWITCH3 SETTING UP FOR MANAGEMENT Choosing the Correct Fiber CablesSNMP Management PIN-OUTS PROBLEM SOLVINGSAFETY INFORMATION C TECHNICAL SPECIFICATIONS D TECHNICAL SUPPORTPage ABOUT THIS GUIDE Table 2 Text Conventions ConventionsCommands Notice IconsRelated DocumentationDocumentation documentation Comments ProductRegistration DocumentationUnit Information Label Power Socket Redundant Power System Socket About the Switches Summary of Hardware FeaturesSwitch - Front View Detail 100/1000BASE-T and 10/100/1000BASE-T Ports 1000BASE-SX Ports GBIC Ports LEDs Switch - Rear View Detail12 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES Table 3 Hardware features Hardware Features Switches14 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES Switch - Front View DetailFigure 1 Switch 4900 - front view Figure 2 Switch 4900 SX - front viewSwitch - Front View Detail Figure 3 Switch 4924 - front view Figure 4 Switch 4950 - front viewPorts cross-over Indicates Power/Self Test LEDTable 4 LED behavior ColorFigure 6 Switch 4900 SX - rear view Switch - RearView Detail Figure 5 Switch 4900 - rear viewPower Socket Default Settings supported by your Switchthe Switch units, it is returned to these defaults Placing Units On Top of Each Other Creating an XRN Distributed Fabric INSTALLING THE SWITCHPackage Contents Choosing a Suitable Site Rack-mounting The Power-up Sequence Switch 4950 - GBIC OperationPackage Contents Choosing a SuitableSite 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 Sequence The Power-upPowering-up the SwitchIf there is evidence of a problem, see “Solving Problems Indicated by Fiber Cables Transceivers Switch 4950 - GBICOperation Approved GBICFiber 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 Methods of Managing a Switch SETTING UP FOR MANAGEMENTSetting Up Overview Manually Configuring IP Information Viewing Automatically Configured IP InformationFigure 12 Initial Switch Setup and Management Flow diagram Setting UpOverview whole setup process is summarised in Figure 12. Detailed proceduralAutomatic IP Configuration Manual IP ConfigurationYou should use the automatic IP configuration method if on pagePre-requisites Manually Configuring IP InformationIP address Connecting the Workstation to the SwitchConfiguring the Workstation with IP Information Setting Up the Switch with IP InformationUsing Command Line Interface via Telnet Pre-requisites Figure 14 Example top-level command line interface menuYou can find pin-out diagrams for both cables in Appendix B on page Connecting the Workstation to the SwitchFigure 15 Connecting a workstation to the Switch via the console port Setting Up the Switch with IP Information Figure 16 Example top-level command line interface menu42 CHAPTER 3 SETTING UP FOR MANAGEMENT Information Configured IPViewing AutomaticallyConnecting the Workstation to the Switch 44 CHAPTER 3 SETTING UP FOR MANAGEMENTPre-requisites Viewing IP Information via the Console Port 46 CHAPTER 3 SETTING UP FOR MANAGEMENT Figure 18 Example top-level command line interface menuRefer to “Setting Up Web Interface Management” on page Refer to “Setting Up Command Line Interface Management” on pageInterface Command LineRefer to “Setting Up SNMP Management” on page using TelnetChoosing a Browser Setting Up Webdescribed in “Setting Up Overview” on page telnetc\ ping Over the Networkhttp//xxx.xxx.xxx.xxx 50 CHAPTER 3 SETTING UP FOR MANAGEMENTsystem management snmp community command - refer to the Setting Up SNMPDefault Users and PasswordsDefault Users The security device user modify command on the CLI, orYou can change the default passwords using either The gettingStarted command on the CLI, orPROBLEM SOLVING Solving Problems Indicated by LEDs Solving Hardware ProblemsSolving Communication Problems Solving Software Upgrade Problems On powering-up, the Power/Self Test LED lights yellow Solving Problemssolutions below The Power LED does not lightProblems Solving HardwareA fan failure warning message is received Error message indicating that the GBIC transceiver is invalid Error message indicating that the GBIC transceiver is faultyUnit fails, no SNMP fan failure message is received IP Addressing Solving Communication ProblemsHow 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 VORSICHT Europe Wichtige SicherheitsinformationenWichtige Sicherheitsinformationen 68 APPENDIX A SAFETY INFORMATION PC-AT Serial Cable B PIN-OUTSPin assignments are identical for 10/100BASE-T and 1000BASE-T RJ-45 Modem CableRJ-45 Pin Assignments1000BASE-T Table 11 Pin assignmentsPin Number 10/100BASE-T72 APPENDIX B PIN-OUTS 413 mm 16.27 in. not including bulge. Weight 6.91 Kg 15.23 lbs TECHNICAL SPECIFICATIONSSwitch 4900 SX Height 65.8 mm 2.59 in. x Width 440 mm 17.3 in 413 mm 16.27 in. not including bulge. Weight 6.4 Kg 14.10 lbsStandards Supported Power SupplyProtocols Used for Administration Heat DissipationWorld Wide Web Site ServicesServices Online TechnicalUsername anonymous aprtechnicalsupport@3com.com Asia, Pacific RimEurope, Middle East and Africa Latin AmericaTelephone Number CountryTelephone Number CountryReturning Products for Repair Telephone Number CountryTelephone Number CountryNumbers INDEXPage INFORMATION TO THE USER How to Identify and Resolve Radio-TV Interference ProblemsREGULATORY NOTICES FCC STATEMENT