3Com Switches, The Hub 1000 SX does not support bandwidth aggregation trunking, Aggregating

Page 31

You can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps

Aggregating Switches

3-3

SuperStack II

Switch 9300

Single-mode fiber-optic cable

SuperStack II

Maximum distance: 3 km

Hub 1000 SX

62.5/125 ∝ fiber-optic cable

Maximum distance: 260 m

Servers with 3C985-SX

Gigabit EtherLink Server NICs

High-end

workstations

Figure 3-2Power Workgroup Connection

Aggregating	You can use the Hub 1000 SX downlinks to aggregate 10/100 Mbps
Switches	switches such as the 3Com SuperStack II Switch 1000, Switch 3000,
	or Switch 3900. The Switch 1000 and Switch 3000 units must be
	equipped with Gigabit Ethernet uplink devices (SuperStack II Switch
	Gigabit Ethernet SX Module, part number 3C16925). The Switch 3900
	has one built-in Gigabit Ethernet port, which can be used to connect with
	the Hub 1000 SX.

First, install 3C16925 uplink devices in the SuperStack II Switch 1000 or SuperStack II Switch 3000 switches. Then connect up to eight switches to the Hub 1000 SX through the eight downlinks. The hub’s optional GBIC uplink can connect to a 3Com SuperStack II Switch 9300 Gigabit Ethernet switch, thereby connecting to the network backbone. See Figure 3-3.

The Hub 1000 SX does not support bandwidth aggregation (trunking).

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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, California2 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 Typeand buttons CommandsSETDEFAULT !0 -IP NETaddr = Menu commandsHub 1000 SX INTRODUCTIONGeneral 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 ColorGBIC Module Connecting aThe 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 ServersThe 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 ConnectionFigure 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 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-3message, return the hub to the supplier Logging OnAfter 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 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 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 INDEX SymbolsNumbers Page Switch 9300 3-2, 3-3 Page SOFTWARE 3Com Corporation LIMITED WARRANTYSTANDARD WARRANTY SERVICE HARDWARELIMITATION OF LIABILITY FCC CLASS A VERIFICATION STATEMENTGOVERNING LAW