3Com 3CR17450-91, 3CR17451-91 manual 1000BASE-T Ports

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12CHAPTER 1: INTRODUCING THE SUPERSTACK 3 SWITCH 3870

10BASE-T/The 10BASE-T/100BASE-TX/1000BASE-T ports have RJ-45 connectors and 100BASE-TX/are configured as Auto MDIX (cross-over).

1000BASE-T Ports

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, 100 Mbps half duplex, 10 Mbps full duplex or 100 Mbps full duplex. It is not possible to manually configure a 1000 Mbps link as auto-negotiation is mandatory in the 1000 Mbps standard. If auto-negotiation is disabled, Auto MDIX cannot function and the ports are fixed as MDIX (cross-over) mode.

If auto-negotiation is disabled on a 1000 Mbps port, the speed will drop to the highest available speed. By default this is 100 Mbps.

Dual Personality SFP The 4 Dual Personality SFP (Small Form Factor Pluggable) ports support Ports fiber Gigabit Ethernet short-wave (SX), long-wave (LX) and long-haul

(LH70) transceivers in any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and remote 1000 Mbps workgroups or to create a high capacity aggregated link backbone connection.

The SFP ports are capable of auto-negotiating flow control. 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.

Console Port The console port allows you to connect a terminal and perform remote or local out-of-band management. As the console port on the Switch is an RJ-45 port, you will need to connect an RJ-45 to DB9 converter cable to a standard null modem cable in order to connect a terminal.

The standard null modem cable is set to autobaud (up to a maximum of 19,200 baud), 8 data bits, no parity and 1 stop bit.

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Contents SuperStack 3 Switch 3870 Family Getting Started Guide 3Com Corporation Campus Drive Marlborough MA USA United States Government LegendContents Setting UP for Management PIN-OUTS Page About this Guide Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation To access the online documentation from the CD-ROM CommentsSwitch 3870Hardware Features Switch Switch Front View Detail1000BASE-T Ports Stack Master LED Color Indicates Port Status/Packet LEDsStacking Status LED Color Indicates Module LEDs Power/Self Test LEDFault LED Unit LEDView Detail Type of Unit Total Units in the Stack Maximum Modules Port Feature Switch Port StatusDuplex Mode Port SpeedDefault Settings Introducing the Superstack 3 Switch Installing the Switch Site Package ContentsChoosing a Suitable Switch, as shown in Figure Power lines and fluorescent lighting fixturesTo rack-mount your Switch Rack-mountingRepeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack-mountingSwitch Power-upPowered-up and ready for operation SequencePower System output Cross-over Cable Straight-through CableSFP Operation Remove the plastic protective cover if fitted Removing an SFP Your SwitchTransceiver Installing the Switch Setting UP for Management Setting Up OverviewManual IP Configuration Automatic IP ConfigurationSetting UP for Management Manually Configuring IP Information Pre-requisitesConnecting the Workstation to the Switch Setting Up the Switch with IP InformationExample top-level command line interface menu Automatically Configured IPViewing Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Refer to Setting Up Command Line Interface Management on Web Interface Command LineInterface Management ManagementNetwork Using Telnet Where xxx.xxx.xxx.xxx is the IP address of the SwitchChoosing a Browser Setting Up WebInterface Over the NetworkPasswords Setting Up SnmpDefault Users User Default Access Level Name Password Security Device User Modify operation on the web interfaceProblem Solving On powering-up, the Power/Self Test LED remains yellow Solving ProblemsPower/Self Test LED does not light Indicated by LEDsSolving Hardware ProblemsRefer to the list of suggested solutions below Port Status LED is flashing green/yellowFan failure warning message is received Unit fails or Snmp thermal shutdown trap is receivedIP Addressing Solving Communication ProblemsError message indicating that the SFP transceiver is faulty How do you obtain a registered IP Address? Solving Software Upgrade Problems Problem Solving Safety Information Power Cord Set Japan Important Safety Information This must be approved for the country where it is usedImportant Safety Information ’information de Sécurité Importante Class’information de Sécurité Importante Dispositif Laser De Classe Wichtige Sicherheitsinformationen Vorsicht EuropeInformación de seguridad importante Laser Gerät der KlasseSchuko Appendix a Safety Information Importanti Informazioni di Sicurezza CSASolo Regno Ważne informacje o zabezpieczeniach Appendix a Safety Information Laser Produkt Klasa Appendix a Safety Information RJ-45 to 9-pin PC-AT Serial CableNull Modem Cable RJ-45 to RS-232 25-pin RJ-45 to RS-232 25-pin Modem CableRJ-45 Pin Assignments Pin Number 10/100 1000Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 3870 24 Port Switch 3870 48 Port Register Your Product to Gain Service BenefitsServices PurchaseContact Us Access SoftwareDownloads Telephone TechnicalAustralia 800 678 Philippines US and Canada Telephone Technical Support and Repair Index SFP Page Chapter Index Regulatory Notices