Switches, Aggregating | 3Com Hub 1000 SX instruction

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).

Image 31

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

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