3Com Hub 1000 SX manual A hub connects to a UPS unit through the hub’s AC power cord

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Table 2-4Advanced RPS Configuration Options

2-10CHAPTER 2: INSTALLING THE HUB

Table 2-4Advanced RPS Configuration Options

Option

Connection

Description

 

 

 

Standard usage

Disconnect the hub’s AC power cable from

The hub obtains DC power from a single

 

the AC outlet. Use the straight DC cable

Power Module instead of being powered

 

supplied with the Power Module to connect

directly from a standard AC source. If the

 

the Power Module directly to the hub

Power Module fails, you can swap the faulty

 

through the DC power connector located

module for a new one. This swapping

 

on the hub’s rear panel. (See “Rear Panel”

method requires a reset of the hub, as in

 

in this chapter.)

a power cycle.

 

 

A cold Power Module supplies power after

 

 

about 5 seconds.

 

 

 

Managed redundancy

Connect the hub’s AC power cable to a

If the Hub 1000 SX internal power supply

 

standard AC outlet. Use the straight DC

fails, the hub’s auto-enable feature

 

cable supplied with the Power Module to

automatically enables the Advanced RPS

 

connect the Power Module directly to the

and resets the hub, as in a power cycle.

 

hub through the DC power connector

 

 

located on the hub’s rear panel. (See “Rear

 

 

Panel” in this chapter.)

 

Full redundancy

Disconnect the hub’s AC power cable from

 

the AC outlet. Use a Y DC cable (part

 

number 3C16079) to connect the hub

 

directly to two Power Modules through the

 

DC power connector located on the hub’s

 

rear panel. (See “Rear Panel” in this chapter.)

This configuration offers full resilience for mission-critical installations. The hub is powered from both Power Modules instead of being powered directly from a standard AC source. If one of the Power Modules fails, the other module takes the full load. The faulty module can be hot-swapped, returning the system to full redundancy without the need for a power reset.

When switching from Advanced RPS (DC) to AC power or from AC power to Advanced RPS power, the Hub 1000 SX unit resets itself. For example, if both the RPS and AC cables are plugged in, and then either is removed, the unit resets itself when it changes to the other power source.

Uninterruptible The SuperStack II Uninterruptible Power System (UPS) (part number Power System 3C16010, U.S. version) protects against building power outages,

brownouts, power surges, and spikes. If primary power fails or falters for any reason, the UPS automatically provides power for as long as 7 minutes for up to four SuperStack II system units with 100-volt 50/60 Hz, 120-volt 60 Hz, or 230-volt 50/60 Hz power.

A hub connects to a UPS unit through the hub’s AC power cord.

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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 TECHNICAL SUPPORT SPECIFICATIONSGLOSSARY INDEX 3COM CORPORATION LIMITED WARRANTY FCC CLASS A VERIFICATION STATEMENTPage FIGURES Page TABLES Port Configuration MenuPage Notice Type ABOUT THIS GUIDEIcon DescriptionMenu commands CommandsSETDEFAULT !0 -IP NETaddr = and buttonsGeneral Description INTRODUCTIONHub 1000 SX Full-Duplex Downlinksand Uplink 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 Maximum Cable ConnectorTable 2-1 Downlink Connections TypeColor Table 2-2 Hub 1000 SX IndicatorsIndicator 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 LengthsServers Power WorkgroupAggregating 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 Symptom Figure 3-6 Uplink Connection to a 10/100 Mbps SwitchTable 3-2 Troubleshooting Tips SolutionUSING THE CONSOLE PORT Requirements Connecting theWith Power Console PortConnecting the Console Port A-3 from powerTo connect the console port when the hub is disconnected DisconnectedAfter 4 minutes of inactivity, the CLI logs off automatically Logging Onmessage, return the hub to the supplier Changing the PasswordPort Settings 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 matrix, Y indicates yes and n indicates no. See Table A-3 DisplayingHub Status Table A-3 Hub Status InformationDisplaying Hub Status A-13 Restoring the Factory Default Settings A-14 APPENDIX A USING THE CONSOLE PORTentering option Updating theFirmware Image 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 TECHNICAL SUPPORT ServicesBoard Service Online Technical1 408 654 Access by Analog ModemAccess by Digital Modem C-2 APPENDIX C TECHNICAL SUPPORTLocal access numbers are available within the following countries Central European HQ Santa Clara, CaliforniaCzech Republic/Slovak 305 261 3266 Miami, FloridaTo obtain an RMA number, call or fax Page GLOSSARY access method Carrier Sense Multiple Access/Collision Detection. Channel accesscable is based on CSMA/CD Carrier Sense Multiple Access/Collision transmission of light signalsflow control IEEEincoming Mbpscontrol. See also asymmetric flow control, flow control, pause frame Numbers SymbolsINDEX Page Switch 9300 3-2, 3-3 Page HARDWARE 3Com Corporation LIMITED WARRANTYSTANDARD WARRANTY SERVICE SOFTWAREGOVERNING LAW FCC CLASS A VERIFICATION STATEMENTLIMITATION OF LIABILITY
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