3Com Hub 1000 SX manual Repeat steps 2 and 3 for the other side of the hub

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4Repeat steps 2 and 3 for the other side of the hub.

2-4CHAPTER 2: INSTALLING THE HUB

.

®

Figure 2-2Attaching a Bracket for Rack Mounting

3Insert the two screws and tighten with a screwdriver. Do not overtighten the screws.

4Repeat steps 2 and 3 for the other side of the hub.

5Mount the hub in the rack and secure it with suitable screws, as shown in

Figure 2-3.

TX	1
	RX
	TX	2
		RX
3C510-SX		TX	3
3C510-SX			RX

TX	RX	1000BASE-SX
TX	4

TX

5

RX

TX

6

RX

TX	7	100
	RX	100
	TX	8
		RX
		50	ACTIVITY				PORT	STATUS
			ACTIVITY				PORT
			LINK
		10	LINK
		10		1	2	3
		%	BW USAGE		2	3	4	5				OVERTEMP
			BW USAGE					5	6			OVERTEMP
									6	7	8	RPS ON
											9	PWR
												RPS FAIL

SUPER STACK UNIT STATUS PAUSE

SuperStack		II
HUB
	1000 SX

Figure 2-3Rack Mounting the Hub

6Remove the protective rubber cap from each downlink port and attach the proper cable to make the desired network connection. Table 2-1 provides connector and cable information for downlink connections. For guidelines on making typical connections, see Chapter 3.

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Contents A member of the 3Com SuperStack II System SuperStack II Hub 1000 SXUser Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California UNITED STATES GOVERNMENT LEGENDSABOUT THIS GUIDE 1 INTRODUCTION CONTENTS2 INSTALLING THE HUB POST Messages A USING THE CONSOLE PORT3 MAKING CONNECTIONS SPECIFICATIONS GLOSSARY INDEX 3COM CORPORATION LIMITED WARRANTYTECHNICAL SUPPORT FCC CLASS A VERIFICATION STATEMENTPage FIGURES Page TABLES Port Conﬁguration MenuPage ABOUT THIS GUIDE IconNotice Type DescriptionCommands SETDEFAULT !0 -IP NETaddr =Menu commands and buttonsGeneral Description INTRODUCTIONHub 1000 SX Downlinks and UplinkFull-Duplex OperationFlow Control Features and FunctionsINSTALLING THE HUB SuperStack II Hub 1000 SX User GuideHub Description The hub’s front and rear panels are shown in Figure Installing and Connecting the Hub4 Repeat steps 2 and 3 for the other side of the hub Connector Table 2-1 Downlink ConnectionsMaximum Cable TypeTable 2-2 Hub 1000 SX Indicators IndicatorColor StatusThe gigabit interface connector GBIC port on the rear panel of the Connecting aGBIC Module Using Optional Power SystemsPower Modules Cabling OptionsA hub connects to a UPS unit through the hub’s AC power cord Table 2-4 Advanced RPS Conﬁguration OptionsYou can connect a UPS unit to an Advanced RPS unit as long as you do not exceed the maximum wattage 325 watts for the UPS unit. To verify that the UPS unit’s maximum wattage is not exceeded, calculate the total power consumption of all units connected to the Advanced RPS. If the result is less than 325 watts, your conﬁguration is safe if the result is greater than 325 watts, then there are too many units connected to the Advanced RPS Page MAKING CONNECTIONS Table 3-1 Gigabit Ethernet Maximum Cable LengthsPower Workgroup AggregatingServers connecting to the network backbone. See FigureYou can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps SwitchesThe Hub 1000 SX does not support bandwidth aggregation trunking Figure 3-3 Aggregated Switches Connection 3-4 CHAPTER 3 MAKING CONNECTIONSThe best use of the hub uplink is as a backbone connection to a 3Com ConnectingFigure 3-4 Mixed Connection Figure 3-6 Uplink Connection to a 10/100 Mbps Switch Table 3-2 Troubleshooting TipsSymptom SolutionUSING THE CONSOLE PORT Connecting the With PowerRequirements Console Portfrom power To connect the console port when the hub is disconnectedConnecting the Console Port A-3 DisconnectedAfter 4 minutes of inactivity, the CLI logs off automatically Logging Onmessage, return the hub to the supplier Password Port SettingsChanging the ConﬁguringTo display the Port Conﬁguration menu Configuring Port Settings Table A-2 Port Conﬁguration MenuA-8 APPENDIX A USING THE CONSOLE PORT Configuring Port Settings and be conﬁgured to receive pause frames Configuring Port Settings A-11 Displaying Hub Statusmatrix, Y indicates yes and n indicates no. See Table A-3 Table A-3 Hub Status InformationDisplaying Hub Status A-13 Restoring the Factory Default Settings A-14 APPENDIX A USING THE CONSOLE PORTUpdating the Firmware Imageentering option Checking theXmodem-CRC To transfer the ﬁrmware image ﬁle log in again. To restart the ﬁle transfer, repeat steps 6 and during a ﬁrmware update, the CLI displays the following messageLogging Off While saving port settings or Table A-4 File Transfer Error MessagesTable A-5 Fatal Error Messages Environmental Operating Ranges SPECIFICATIONSPhysical Dimensions Page Services Board ServiceTECHNICAL SUPPORT Online TechnicalAccess by Analog Modem Access by Digital Modem1 408 654 C-2 APPENDIX C TECHNICAL SUPPORTLocal access numbers are available within the following countries Santa Clara, California Czech Republic/SlovakCentral European HQ 305 261 3266 Miami, FloridaTo obtain an RMA number, call or fax Page GLOSSARY Carrier Sense Multiple Access/Collision Detection. Channel access cable is based on CSMA/CD Carrier Sense Multiple Access/Collisionaccess method transmission of light signalsIEEE incomingﬂow control Mbpscontrol. See also asymmetric ﬂow control, ﬂow control, pause frame Numbers SymbolsINDEX Page Switch 9300 3-2, 3-3 Page 3Com Corporation LIMITED WARRANTY STANDARD WARRANTY SERVICEHARDWARE SOFTWAREGOVERNING LAW FCC CLASS A VERIFICATION STATEMENTLIMITATION OF LIABILITY