3Com 3CR17451-91 Color Indicates Port Status/Packet LEDs, Stacking Status LED, Stack Master LED

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Switch 3870 — Front View Detail 13

LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their status according to color. For information on using the LEDs for problem solving, see “Checking for Correct Operation of LEDs” on page 23.

Table 4	LED behavior

LED	Color	Indicates

Port Status/Packet LEDs
	Green	A high speed (1000 Mbps) link is present, and the port
		is enabled.
	Green flashing	A high speed (1000 Mbps) link is present and active.
	Yellow	A low speed (10/100 Mbps) link is present, and the
		port is enabled.
	Yellow flashing	A low speed (10/100 Mbps) link is present and active.
	Green for one	POST in operation, all LEDs perform a one second lamp
	second, Amber	test.
	for one second,
	then OFF until
	operational.
	Alternate yellow	A port has failed a loop back test during POST.
	then green
	flashing (fast)
	Alternate yellow	A link is present but the port has been disabled.
	then green
	flashing
	Off	No link is present.
Stacking Status LED
	Green	The uplink/downlink is operating normally.
	Yellow	One-sided connection (one side of the cable is
		connected but the other side is not).
	Off	No stacking link is present.
Stack Master LED
	Green	Master unit - normal stack operation status.
	Yellow	Slave unit - normal stack operation status.
	Yellow flashing	The system is in arbitration/election status.
	Off	The system is not stacked.

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Contents SuperStack 3 Switch 3870 Family Getting Started Guide United States Government Legend 3Com Corporation Campus Drive Marlborough MA USAContents Setting UP for Management PIN-OUTS Page About this Guide Conventions Icon DescriptionConvention Description Related DocumentationDocumentation documentation Comments To access the online documentation from the CD-ROM3870 SwitchHardware Features Switch Front View Detail Switch1000BASE-T Ports Color Indicates Port Status/Packet LEDs Stacking Status LEDStack Master LED Unit LED Power/Self Test LEDFault LED Color Indicates Module LEDsView Detail Port Speed Feature Switch Port StatusDuplex Mode Type of Unit Total Units in the Stack Maximum Modules PortDefault Settings Introducing the Superstack 3 Switch Installing the Switch Package Contents Choosing a SuitableSite Rack-mounting Power lines and fluorescent lighting fixturesTo rack-mount your Switch Switch, as shown in FigureFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchSequence Power-upPowered-up and ready for operation SwitchCross-over Cable Straight-through Cable Power System outputSFP Operation Remove the plastic protective cover if fitted Your Switch TransceiverRemoving an SFP Installing the Switch Setting UP for Management Overview Setting UpAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationSetting Up the Switch with IP Information Connecting the Workstation to the SwitchExample top-level command line interface menu Configured IP ViewingAutomatically Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Refer to Setting Up Command Line Interface Management on Management Command LineInterface Management Web InterfaceWhere xxx.xxx.xxx.xxx is the IP address of the Switch Network Using TelnetOver the Network Setting Up WebInterface Choosing a BrowserSetting Up Snmp Default UsersPasswords Security Device User Modify operation on the web interface User Default Access Level Name PasswordProblem Solving Indicated by LEDs Solving ProblemsPower/Self Test LED does not light On powering-up, the Power/Self Test LED remains yellowPort Status LED is flashing green/yellow ProblemsRefer to the list of suggested solutions below Solving HardwareUnit fails or Snmp thermal shutdown trap is received Fan failure warning message is receivedSolving Communication Problems Error message indicating that the SFP transceiver is faultyIP Addressing How do you obtain a registered IP Address? Solving Software Upgrade Problems Problem Solving Safety Information This must be approved for the country where it is used Power Cord Set Japan Important Safety InformationImportant Safety Information Class ’information de Sécurité Importante’information de Sécurité Importante Dispositif Laser De Classe Vorsicht Europe Wichtige SicherheitsinformationenLaser Gerät der Klasse Información de seguridad importanteSchuko Appendix a Safety Information CSA Importanti Informazioni di SicurezzaSolo Regno Ważne informacje o zabezpieczeniach Appendix a Safety Information Laser Produkt Klasa Appendix a Safety Information PC-AT Serial Cable Null Modem Cable RJ-45 to RS-232 25-pinRJ-45 to 9-pin Pin Number 10/100 1000 Modem CableRJ-45 Pin Assignments RJ-45 to RS-232 25-pinPin Number 10/100 1000 Appendix B PIN-OUTS Switch 3870 24 Port Switch 3870 48 Port Purchase Product to Gain Service BenefitsServices Register YourTelephone Technical Access SoftwareDownloads Contact UsAustralia 800 678 Philippines US and Canada Telephone Technical Support and Repair Index SFP Page Chapter Index Regulatory Notices