3Com 3 Color Indicates Port Status LEDs 10BASE-T/100BASE-TX ports, Port Status LEDs SFP ports

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About the Switch 4200 Series 15

negotiated with the link partner. Alternatively, auto-negotiation can be disabled and the flow control setting can be manually configured.

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 “Solving Problems Indicated by LEDs” on page 54.

It is not possible to determine the duplex mode from the LEDs. For more detailed information, refer to the “SuperStack 3 Switch Management Interface Reference Guide” on the CD-ROM that is supplied with the Switch.

Table 4	LED behavior

LED	Color	Indicates

Port Status LEDs 10BASE-T/100BASE-TX ports
	Green	A 100 Mbps link is present and the port is enabled.
	Green flashing	Packets are being transmitted/received on the port.
	Yellow	A 10 Mbps link is present and the port is enabled.
	Yellow flashing	Packets are being transmitted/received on the port.
	Green / Yellow	A 10 or 100 Mbps link is present, but the port is disabled.
	alternating
	Off	No link is present.

Port Status LEDs SFP ports

Green	A 1000 Mbps link is present and the port is enabled.
Green flashing	Packets are being transmitted/received on the port.

Port Status LEDs 10/100/1000BASE-T ports

	Green	A 1000 Mbps link is present and the port is enabled.
	Green flashing	Packets are being transmitted/received on the port.
	Yellow	A 10 or 100 Mbps link is present and the port is enabled.
	Yellow flashing	Packets are being transmitted/received on the port.
	Green / Yellow	A 10, 100 or 1000 Mbps link present but disabled.
	alternating
	Off	No link is present.
Unit LEDs
1–4	Green	When the Switch forms a stack with other Switch 4200
		Family units the LED indicates the position of the unit in the
		stack and that a link is present. Unit LED number 1 can also
		indicate a stand-alone Switch.
	Off	The Switch initialization process is not complete.

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Contents SuperStack United States Government Legend 3Com Corporation 350 Campus Drive Marlborough, MAContents Setting UP for Management PIN-OUTS Page About this Guide Conventions Icon DescriptionConvention Description Documentation RelatedAbout this Guide Introducing Family About the SwitchFront View Detail Switch 4200 FamilyIntroducing the Superstack 3 Switch 4200 Family Unit LEDs Color Indicates Port Status LEDs 10BASE-T/100BASE-TX portsPort Status LEDs SFP ports Port Status LEDs 10/100/1000BASE-T portsLED Color Indicates Power/Self Test LED Rear View DetailAlert LED Quality of Service QoS Feature Switch 4200 Family Automatic IP ConfigurationDuplex Mode Rmon AlarmIntroducing the Superstack 3 Switch 4200 Family Installing the Switch Package Contents Choosing a SuitableSite Rack-mounting Fitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchPlacing Units On Top of Each OtherStacking Units Sequence Power-upPowering-up Switch 4200 FamilySFP port on the Switch 4200 28-Port SFP OperationColor State Installing the Switch Transceiver Your SwitchChoosing Correct CablesCross-over Cable Straight-through Cable Fiber CablesChoosing the Correct Cables Installing the Switch Setting UP for Management Overview Setting UpConfigure IP information manually for your Switch or view Automatically configured IP informationAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationConnecting the Workstation to the Switch Configuring the Workstation with IP InformationSetting Up the Switch with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu Connecting a workstation to the Switch via the console port Setting Up the Switch with IP Information Example top-level command line interface menu Configured IP ViewingAutomatically Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Methods of Managing a Switch Refer to Setting Up Command Line Interface Management on CLI Management via Command LineNetwork Using Telnet Interface ManagementSetting Up Web InterfaceChoosing a Browser Management workstation Setting Up SnmpManagement Protocol Snmp can manage a Switch if Over the NetworkUser Default Access Level Name Password Default UsersSecurity Device User Modify operation on the web interface Security device user modify command on the CLI, orSetting UP for Management For Technical Support information, see Appendix D Problem SolvingOn powering-up, the Power/Self Test LED lights yellow Solving ProblemsSolutions below Power LED does not lightSolving Communication Problems Error message indicating that the SFP transceiver is faultyIP Addressing Solving Software Upgrade ProblemsSolving Stack FormationSafety Information This must be approved for the country where it is used Important Safety InformationImportant Safety Information ’information de Sécurité Importante Schko Wichtige Sicherheitsinformationen Vorsicht Europe Información de seguridad importante Schuko Importanti informazioni di sicurezza Avvertenza Lunità deve disporre di messa a terra Prodotto Laser Classe Pin to 9-pin Null Modem CablePC-AT Serial Cable Pin to RS-232 25-pinPin Number 10/100 1000 Modem CableRJ-45 Pin AssignmentsPin Number 10/100 1000 Appendix B PIN-OUTS Switch 4200 26-Port 3C17300A Switch 4200 50-Port 3C17302A Switch 4200 28-Port 3C17304A Appendix C Technical Specifications Purchase ServicesRegister Your ProductDownloads Access SoftwareTroubleshoot OnlineContact Us Country Telephone Number Latin America Telephone Technical Support and RepairUS and Canada Telephone Technical Support and Repair Numbers IndexSFP ports 14 SFP transceiver Regulatory Notices

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