3Com DUA1770-0AAA04 manual Color Indicates Port Status LEDs, Module Status LEDs, Unit LEDs

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Switch — Front View Detail 17

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 26.

Table 4 LED behavior

LED	Color	Indicates

Port Status LEDs
Packet	Yellow	Packets are being transmitted/received on the port.
	Off	No packets are being transmitted/received on the port.
Status	Green	A high speed (1000 Mbps) link is present, and the port
		is enabled.
	Green flashing	A high speed (1000 Mbps) link is present, but the port
		is disabled.
	Yellow	A low speed (100 Mbps on 4900, 10/100 Mbps on
		4924/4950) link is present, and the port is enabled.
		(Not applicable on 4900 SX.)
	Yellow flashing	A low speed (100 Mbps on 4900, 10/100 Mbps on
		4924/4950) link is present, but the port is disabled.
		(Not applicable on 4900 SX.)
	Off	No link is present.
Module Status LEDs
	Green	The Module is installed and supported. The Link Status
		has been determined for a single port Module.
	Yellow	The Module is installed and supported. The Module
		has multi-ports or there is no Link for a single port
		Module.
	Yellow flashing	The Module is installed but not supported. Note that
		the Switch will continue to operate normally.
	Off	The Module is not installed.
Unit LEDs
1–4	Green	Determines the identity of the Switch when
		interconnected to another Switch to create an XRN
		Distributed Fabric and that a link is present.
	Off	A fault has occurred.
Power/Self Test LED
	Green	The Switch is powered-up and operating normally.
	Green flashing	The Switch is either downloading software or is
		initializing (which includes running a Power On Self
		Test).
	Yellow	The Switch has failed its Power On Self Test.
	Off	The Switch is not receiving power.

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Setting UP for Management PIN-OUTS Page About this Guide Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation SuperStack 3 Switch 4900 Series Getting Started Guide Please include the following information when commenting3Com recommends that you copy the Docs/referenceguide Directory as a whole to maintain the structure of the filesIntroducing Introducing the Superstack 3 Switch 4900 Series Hardware Features Switches Switch 4900 front view Switch Front View DetailSwitch 4924 front view Ports cross-over Color Indicates Port Status LEDs Power/Self Test LEDModule Status LEDs Unit LEDsSwitch 4900 rear view Switch RearSwitch 4924 rear view Power SocketSwitch units, it is returned to these defaults Default SettingsSupported by your Switch Installing the Switch Site Package ContentsChoosing a Suitable Rack-mounting Flow through the side panels of the SwitchDesk, or attach it to a wall Have been fittedFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchInterconnecting two Switch 4900 units Powering-up Power-upSwitch SequencePower System output That contain alignment pins can cause damage to your Switch RJ-45 connector is now a grounded portYour Switch OptionsOperation Switch 4950 GbicApproved Gbic TransceiversInserting a Gbic Transceiver into a Switch Fiber SC connector Type 4 Gbic with internal Eeprom fittedSwitch 4950 Gbic Operation 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 SwitchConfiguring the Workstation with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu 19,200 baud Data bits Connecting a workstation to the Switch via the console portSetting Up the Switch with IP Information Automatically Configured IPViewing Pre-requisites Viewing IP Information via the Console Port Example top-level command line interface menu Refer to Setting Up Command Line Interface Management on Network Using Telnet Command LineInterface Management CLI Management viaChoosing a Browser Setting Up WebInterface Http//xxx.xxx.xxx.xxx Over the NetworkPasswords Setting Up SnmpDefault Users Security Device User Modify operation on the web interface User Default Name Password Access LevelFor Technical Support information, see Appendix D Problem SolvingSolutions below Solving ProblemsPower LED does not light On powering-up, the Power/Self Test LED lights yellowSolving Hardware ProblemsFan failure warning message is received For further information about RMON, refer to StatusUnit fails, no Snmp fan failure message is received Error message indicating that the Gbic transceiver is faultyIP Addressing Solving Communication ProblemsHow do you obtain a registered IP Address? Safety Information This must be approved for the country where it is used Important Safety InformationImportant Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Schko ’information de Sécurité ImportanteAppendix a Safety Information 3CGBIC91 Gbic SX 3CGBIC92 Gbic LX Der Netzstecker muß die Norm CEE 7/7 erfüllen Schuko Wichtige SicherheitsinformationenWichtige Sicherheitsinformationen Appendix a Safety Information Pin to 9-pin PC-AT Serial CableNull Modem Cable 9-pin to RS-232 25-pin Modem Cable ConnectorsRJ-45 Pin AssignmentsPin Number 10/100BASE-T 1000BASE-T Appendix B PIN-OUTS Safety Physical DimensionsPower Consumption Same unless otherwise statedProtocols Used for Administration Power SupplyHeat Dissipation Standards SupportedOnline Technical ServicesUsername anonymous From this region, email Asia, Pacific RimEurope, Middle East and Africa From this region, enter the URLEurope, Middle East and Africa Asia, Pacific RimCountry Telephone Number Asia, Pacific Rim Country Telephone Number Latin America Numbers IndexPasswords Regulatory Notices