Flow Control | 3Com Hub 1000 SX manual

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3Com Hub 1000 SX manual Flow Control

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, California CONTENTS 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 Type and buttons CommandsSETDEFAULT !0 -IP NETaddr = Menu commands INTRODUCTION Hub 1000 SXGeneral 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 Connecting a GBIC ModuleThe 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 Switches 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 Connection Connecting 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 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 Logging On message, return the hub to the supplierAfter 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 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 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 Symbols INDEXNumbers Page Switch 9300 3-2, 3-3 Page SOFTWARE 3Com Corporation LIMITED WARRANTYSTANDARD WARRANTY SERVICE HARDWARE FCC CLASS A VERIFICATION STATEMENT LIMITATION OF LIABILITYGOVERNING LAW