Installing and, Connecting the Hub | 3Com Hub 1000 SX guide

Installing and

Preparing the Site 2-3

Rear Panel The AC input socket accepts a 100–240 V AC power cord. Power can be supplied through optional 3Com SuperStack II Advanced Redundant Power System (Advanced RPS) and SuperStack II Uninterruptible Power System (UPS) units. These units use the DC power connector. See “Using Optional Power Systems” later in this chapter.

The console port, a DB-9 standard male connector, can connect to a PC through a null modem cable. For information on the console functions, see Appendix A.

The Reset button resets the hub’s on-board CPU.

The GBIC port accepts an optional 3Com GBIC module that lets the hub connect to a Gigabit Ethernet device.

Preparing the Site Make sure that the installation site meets the following conditions:

■The hub is accessible and you can easily connect the cables.

■The cables are away from:

■Sources of electrical noise, such as: heating, ventilation, and air conditioning (HVAC); radios; transmitters; and broadband ampliﬁers

■Power lines and ﬂuorescent lighting ﬁxtures

■Water or moisture cannot enter the hub’s case.

■Airﬂow around the unit and through the vents is not restricted. Provide a minimum of 1-inch (2.5-cm) clearance on all four sides of the unit.

■No objects are placed directly on top of the unit.

Installing and	You can mount the hub in a standard 19-inch rack or place it on a desk
Connecting the Hub	or table.

Mounting in a Rack Two brackets and four screws allow rack mounting in a standard 19-inch rack.

1Place the hub on a level surface, with the front panel facing you.

2Position a bracket over the mounting holes on one side of the hub, as shown in Figure 2-2.

Image 19

3Com Hub 1000 SX manual Installing and, Connecting the Hub

Contents

User Guide SuperStack II Hub 1000 SXA member of the 3Com SuperStack II System UNITED STATES GOVERNMENT LEGENDS 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 2 INSTALLING THE HUB CONTENTSABOUT THIS GUIDE 1 INTRODUCTION 3 MAKING CONNECTIONS A USING THE CONSOLE PORTPOST Messages FCC CLASS A VERIFICATION STATEMENT SPECIFICATIONSGLOSSARY INDEX 3COM CORPORATION LIMITED WARRANTY TECHNICAL SUPPORTPage FIGURES Page Port Conﬁguration Menu TABLESPage Description ABOUT THIS GUIDEIcon Notice Type and buttons CommandsSETDEFAULT !0 -IP NETaddr = Menu commands Hub 1000 SX INTRODUCTIONGeneral Description Operation Downlinksand Uplink Full-Duplex Flow Control Functions Features and SuperStack II Hub 1000 SX User Guide INSTALLING THE HUB Hub Description The hub’s front and rear panels are shown in Figure Connecting the Hub Installing and 4 Repeat steps 2 and 3 for the other side of the hub Type ConnectorTable 2-1 Downlink Connections Maximum Cable Status Table 2-2 Hub 1000 SX IndicatorsIndicator Color GBIC Module Connecting aThe gigabit interface connector GBIC port on the rear panel of the Power Systems Using Optional Cabling Options Power Modules Table 2-4 Advanced RPS Conﬁguration Options A hub connects to a UPS unit through the hub’s AC power cord You 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 Table 3-1 Gigabit Ethernet Maximum Cable Lengths MAKING CONNECTIONS connecting to the network backbone. See Figure Power WorkgroupAggregating Servers The Hub 1000 SX does not support bandwidth aggregation trunking SwitchesYou can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps 3-4 CHAPTER 3 MAKING CONNECTIONS Figure 3-3 Aggregated Switches Connection Figure 3-4 Mixed Connection ConnectingThe best use of the hub uplink is as a backbone connection to a 3Com Solution Figure 3-6 Uplink Connection to a 10/100 Mbps SwitchTable 3-2 Troubleshooting Tips Symptom USING THE CONSOLE PORT Console Port Connecting theWith Power Requirements Disconnected from powerTo connect the console port when the hub is disconnected Connecting the Console Port A-3 message, return the hub to the supplier Logging OnAfter 4 minutes of inactivity, the CLI logs off automatically Conﬁguring PasswordPort Settings Changing the To display the Port Conﬁguration menu Table A-2 Port Conﬁguration Menu Configuring Port Settings A-8 APPENDIX A USING THE CONSOLE PORT Configuring Port Settings and be conﬁgured to receive pause frames Configuring Port Settings A-11 Table A-3 Hub Status Information DisplayingHub Status matrix, Y indicates yes and n indicates no. See Table A-3 Displaying Hub Status A-13 A-14 APPENDIX A USING THE CONSOLE PORT Restoring the Factory Default Settings Checking the Updating theFirmware Image entering option Xmodem-CRC To transfer the ﬁrmware image ﬁle Logging Off during a ﬁrmware update, the CLI displays the following messagelog in again. To restart the ﬁle transfer, repeat steps 6 and Table A-5 Fatal Error Messages Table A-4 File Transfer Error MessagesWhile saving port settings or Physical Dimensions SPECIFICATIONSEnvironmental Operating Ranges Page Online Technical ServicesBoard Service TECHNICAL SUPPORT C-2 APPENDIX C TECHNICAL SUPPORT Access by Analog ModemAccess by Digital Modem 1 408 654 Local access numbers are available within the following countries 305 261 3266 Miami, Florida Santa Clara, CaliforniaCzech Republic/Slovak Central European HQ To obtain an RMA number, call or fax Page GLOSSARY transmission of light signals Carrier Sense Multiple Access/Collision Detection. Channel accesscable is based on CSMA/CD Carrier Sense Multiple Access/Collision access method Mbps IEEEincoming ﬂow control control. See also asymmetric ﬂow control, ﬂow control, pause frame INDEX SymbolsNumbers Page Switch 9300 3-2, 3-3 Page SOFTWARE 3Com Corporation LIMITED WARRANTYSTANDARD WARRANTY SERVICE HARDWARE LIMITATION OF LIABILITY FCC CLASS A VERIFICATION STATEMENTGOVERNING LAW