3Com Hub 1000 SX manual

Page 27

Using Optional Power Systems 2-11

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.

To calculate the total power consumption of all units connected to the Advanced RPS:

1Calculate the total wattage of all the units connected to the Advanced RPS.

For example, one Hub 1000 SX has a maximum power consumption of 65 watts; two Hub 1000 SX units have a maximum power consumption of 130 watts, and so forth.

2Divide the total wattage of all units by 0.7, which is the efﬁciency rating (70%) of the Advanced RPS.

If the result is less than 325 watts, your conﬁguration is safe; if the result is higher, then there are too many units connected to the Advanced RPS.

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Contents SuperStack II Hub 1000 SX User GuideA member of the 3Com SuperStack II System UNITED STATES GOVERNMENT LEGENDS 3Com Corporation 5400 Bayfront Plaza Santa Clara, CaliforniaCONTENTS 2 INSTALLING THE HUBABOUT THIS GUIDE 1 INTRODUCTION A USING THE CONSOLE PORT 3 MAKING CONNECTIONSPOST 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 Typeand buttons CommandsSETDEFAULT !0 -IP NETaddr = Menu commandsINTRODUCTION Hub 1000 SXGeneral Description Operation Downlinksand Uplink Full-DuplexFlow Control Functions Features andSuperStack II Hub 1000 SX User Guide INSTALLING THE HUBHub Description The hub’s front and rear panels are shown in Figure Connecting the Hub Installing and4 Repeat steps 2 and 3 for the other side of the hub Type ConnectorTable 2-1 Downlink Connections Maximum CableStatus Table 2-2 Hub 1000 SX IndicatorsIndicator ColorConnecting a GBIC ModuleThe gigabit interface connector GBIC port on the rear panel of the Power Systems Using OptionalCabling Options Power ModulesTable 2-4 Advanced RPS Conﬁguration Options A hub connects to a UPS unit through the hub’s AC power cordYou 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 CONNECTIONSconnecting to the network backbone. See Figure Power WorkgroupAggregating ServersSwitches The Hub 1000 SX does not support bandwidth aggregation trunkingYou can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps 3-4 CHAPTER 3 MAKING CONNECTIONS Figure 3-3 Aggregated Switches ConnectionConnecting Figure 3-4 Mixed ConnectionThe 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 SymptomUSING THE CONSOLE PORT Console Port Connecting theWith Power RequirementsDisconnected from powerTo connect the console port when the hub is disconnected Connecting the Console Port A-3Logging On message, return the hub to the supplierAfter 4 minutes of inactivity, the CLI logs off automatically Conﬁguring PasswordPort Settings Changing theTo display the Port Conﬁguration menu Table A-2 Port Conﬁguration Menu Configuring Port SettingsA-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-3Displaying Hub Status A-13 A-14 APPENDIX A USING THE CONSOLE PORT Restoring the Factory Default SettingsChecking the Updating theFirmware Image entering optionXmodem-CRC To transfer the ﬁrmware image ﬁle during a ﬁrmware update, the CLI displays the following message Logging Offlog in again. To restart the ﬁle transfer, repeat steps 6 and Table A-4 File Transfer Error Messages Table A-5 Fatal Error MessagesWhile saving port settings or SPECIFICATIONS Physical DimensionsEnvironmental Operating Ranges Page Online Technical ServicesBoard Service TECHNICAL SUPPORTC-2 APPENDIX C TECHNICAL SUPPORT Access by Analog ModemAccess by Digital Modem 1 408 654Local access numbers are available within the following countries 305 261 3266 Miami, Florida Santa Clara, CaliforniaCzech Republic/Slovak Central European HQTo 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 methodMbps IEEEincoming ﬂow controlcontrol. See also asymmetric ﬂow control, ﬂow control, pause frame Symbols INDEXNumbers Page Switch 9300 3-2, 3-3 Page SOFTWARE 3Com Corporation LIMITED WARRANTYSTANDARD WARRANTY SERVICE HARDWAREFCC CLASS A VERIFICATION STATEMENT LIMITATION OF LIABILITYGOVERNING LAW