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3Com DUA1770-0AAA04 manual Solving Communication Problems, IP Addressing

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Solving

Solving Communication Problems

57

Solving

Communication

Problems

If you experience communication problems with the Switch, ensure that:

■The Switch IP address has been configured.

■If the Switch is separated from your management application by a router, ensure that the default gateway IP address within the Switch is the same as the IP address of the router.

■The Switch’s IP address has been entered correctly in your network management application (for example 3Com Network Supervisor).

The following is an brief overview of IP addressing, and how to obtain a registered IP address.

IP Addressing

To be managed correctly, each device on your network (for example a Switch or Hub) must have a unique IP address. IP addresses have the format n.n.n.n where n is a decimal number between 0 and 255. An example IP address is 192.168.100.8.

The IP address is split into two parts:

■The first part (‘192.168.100’ in the example) identifies the network on which the device resides

■The second part (‘.8’ in the example) identifies the device within the network

The natural subnet mask for this example is 255.255.255.0.

If your network has a connection to the external IP network, that is, you access the Internet, you must apply for a registered IP address.

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3Com DUA1770-0AAA04 manual Solving Communication Problems, IP Addressing

Contents

Switch 4900 3C17700 Switch 4900 SX 3C17702 Switch 4924 3C17701 Switch 4900 Series Getting Started GuideSwitch 4950 3C17706 SuperStackENVIRONMENTAL STATEMENT UNITED STATES GOVERNMENT LEGENDEnd of Life Statement Regulated Materials Statement1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIES CONTENTS2 INSTALLING THE SWITCH ABOUT THIS GUIDE3 SETTING UP FOR MANAGEMENT Choosing the Correct Fiber CablesSNMP Management SAFETY INFORMATION PROBLEM SOLVINGC TECHNICAL SPECIFICATIONS D TECHNICAL SUPPORT PIN-OUTSPage ABOUT THIS GUIDE Commands ConventionsNotice Icons Table 2 Text ConventionsRelated DocumentationDocumentation documentation Registration ProductDocumentation CommentsSwitch - Front View Detail 100/1000BASE-T and 10/100/1000BASE-T Ports About the Switches Summary of Hardware Features1000BASE-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 Table 3 Hardware features Hardware Features SwitchesFigure 1 Switch 4900 - front view Switch - Front View DetailFigure 2 Switch 4900 SX - front view 14 CHAPTER 1 INTRODUCING THE SUPERSTACK 3 SWITCH 4900 SERIESSwitch - Front View Detail Figure 3 Switch 4924 - front view Figure 4 Switch 4950 - front viewPorts cross-over Table 4 LED behavior Power/Self Test LEDColor IndicatesView Detail Switch - RearFigure 5 Switch 4900 - rear view Figure 6 Switch 4900 SX - rear viewPower Socket Default Settings supported by your Switchthe Switch units, it is returned to these defaults Package Contents Choosing a Suitable Site Rack-mounting INSTALLING THE SWITCHThe Power-up Sequence Switch 4950 - GBIC Operation Placing Units On Top of Each Other Creating an XRN Distributed FabricPackage 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 Powering-up the The Power-upSwitch SequenceIf there is evidence of a problem, see “Solving Problems Indicated by Fiber Cables Operation Switch 4950 - GBICApproved 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 Overview Manually Configuring IP Information SETTING UP FOR MANAGEMENTViewing Automatically Configured IP Information Methods of Managing a SwitchOverview Setting Upwhole setup process is summarised in Figure 12. Detailed procedural Figure 12 Initial Switch Setup and Management Flow diagramAutomatic IP Configuration Manual IP ConfigurationYou should use the automatic IP configuration method if on pagePre-requisites Manually Configuring IP InformationConfiguring the Workstation with IP Information Connecting the Workstation to the SwitchSetting Up the Switch with IP Information IP addressUsing 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 Viewing Configured IPAutomatically InformationConnecting 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 pageRefer to “Setting Up SNMP Management” on page Command Lineusing Telnet Interfacedescribed in “Setting Up Overview” on page Setting Up Webtelnet Choosing a Browserhttp//xxx.xxx.xxx.xxx Over the Network50 CHAPTER 3 SETTING UP FOR MANAGEMENT c\ pingDefault Users and Setting Up SNMPPasswords system management snmp community command - refer to theYou can change the default passwords using either The security device user modify command on the CLI, orThe gettingStarted command on the CLI, or Default UsersPROBLEM SOLVING Solving Problems Indicated by LEDs Solving Hardware ProblemsSolving Communication Problems Solving Software Upgrade Problems solutions below Solving ProblemsThe Power LED does not light On powering-up, the Power/Self Test LED lights yellowProblems 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-OUTSRJ-45 Pin Modem CableAssignments Pin assignments are identical for 10/100BASE-T and 1000BASE-T RJ-45Pin Number Table 11 Pin assignments10/100BASE-T 1000BASE-T72 APPENDIX B PIN-OUTS Switch 4900 SX Height 65.8 mm 2.59 in. x Width 440 mm 17.3 in TECHNICAL SPECIFICATIONS413 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 lbsProtocols Used for Administration Power SupplyHeat Dissipation Standards SupportedServices ServicesOnline Technical World Wide Web SiteUsername anonymous Europe, Middle East and Africa Asia, Pacific RimLatin America aprtechnicalsupport@3com.comTelephone Number CountryCountry Telephone NumberReturning Products for Repair Telephone Number CountryCountry Telephone NumberNumbers INDEXPage REGULATORY NOTICES How to Identify and Resolve Radio-TV Interference ProblemsFCC STATEMENT INFORMATION TO THE USER