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This chapter describes how to diagnose and resolve operating problems with
your hub.

Additionally, if you have an HP J3133A AdvanceStack 8U/16U SNMP Module
installed, you can use ASCII console software for certain diagnostic
functions to troubleshoot the hub.

Troubleshooting Approaches

There are three primary ways to diagnose hub problems:

By checking the LEDs on the front of the hub as described in
“Diagnosing with the LEDs” later in this chapter.

By visually inspecting the unit and all its connections as described in
the “Installation Problems” and “Cabling Problems” sections later in
this chapter.

By using the ASCII console’s diagnostic functions as described in the
documentation shipped with the HP AdvanceStack 8U/16U SNMP
Module, and in the software’s online help system.

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Troubleshooting

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Содержание AdvanceStack J2610B

Страница 1: ...HP AdvanceStack 10Base T Hub 8U Installation and Reference Guide ...

Страница 2: ... TO THIS MATERIAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Hewlett Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material Hewlett Packard assumes no responsibility for the use or reliability of its software on equipment...

Страница 3: ...tiport repeater with eight twisted pair network ports With this hub you can connect computers and other devices together in an unshielded twisted pair cable network This hub is compliant with the IEEE 802 3 Type 10Base T standard and supports both 802 3 and Ethernet networks iii ...

Страница 4: ... Twisted pair ports twisted pair port LEDs AUI Xcvr port LED Front of the Hub DC power receptacle cover plate over expansion slot for HP AdvanceStack 8U 16U SNMP Module cover plate over slot for HP AUI and Transceiver Modules Back of the Hub iv ...

Страница 5: ... an optional ThinLAN or fiber optic transceiver installed in the back of the hub An AUI Xcvr Slot in the back of the hub for several types of transceiver modules including ThinLAN AUI twisted pair and fiber optic With the optional ThinLAN transceiver you can hot swap a hub Hot swap means that removing a hub connected to other hubs through the ThinLAN transceiver does not bring down the network you...

Страница 6: ......

Страница 7: ...rvice 1 FTP to Internet IP Address ftp ftp hp com 2 Log in as anonymous and press Enter at the password prompt 3 Enter bin to set the transfer type 4 Enter cd pub networking software 5 Enter get filename to transfer the file to your computer then quit CompuServe 1 Login to CompuServe 2 Go to the hp service 3 Select HP Systems Disks Tapes etc 4 Select Networking Products library 5 Download filename...

Страница 8: ... local area networks Contact your HP Authorized Reseller or the nearest HP Sales and Support Office for more information HP SupportPack Comprehensive Network Support provides complete prob lem resolution for medium to large interconnected local and wide area networks Contact your HP Authorized Reseller or the nearest HP Sales and Support Office for more information HP offers other hardware support...

Страница 9: ...ns 1 10 ThinLAN Connections 1 11 Connecting Hubs to Network Backbones 1 12 Connecting the Hub 8U to a ThinLAN Backbone 1 12 Connecting the Hub 8U to a Fiber Optic Backbone 1 13 5 Connect the hub to an ASCII console optional 1 14 2 Troubleshooting Troubleshooting Approaches 2 2 Diagnosing with the LEDs 2 3 LED Pattern During Self Test 2 3 LED Error Indications 2 4 Installation Problems 2 6 Incorrec...

Страница 10: ... 3 4 AUI Xcvr Slot 3 4 Hub Operation 3 5 Collision Detection 3 5 Auto Partitioning 3 5 Link Beat 3 6 A Cables and Connectors Recommended Cables A 2 Twisted Pair Cable Connector Pin Outs A 3 Twisted Pair Cable for Hub to Computer Network Connection A 3 Twisted Pair Cable Pin Assignments A 4 Twisted Pair Straight Through Cable A 4 ThinLAN Cable Requirements A 4 B Specifications Safety and Regulatory...

Страница 11: ...alling the Hub Installation Summary 1 Install Add in Modules optional 2 Verify the Hub s Operation 3 Mount the Hub 4 Complete the Network Connections to the Hub 5 Connect the Hub to an ASCII Console optional ...

Страница 12: ...abletop 4 Connect the hub to a network or other hubs and connect computer s and or other device s to the hub s ports 5 Optional Connect the hub to the AdvanceStack 8U 16U SNMP management console Included Parts Each HP AdvanceStack Hub 8U has the following components shipped with it HP AdvanceStack Hub 8U Installation and Reference Guide this manual J2610 90101 An ac power cord one of the following...

Страница 13: ...se optional modules before installing the hub under a desk or other location Inspect your installation site and identify whether the hub s module slots will be accessible The HP J3133A AdvanceStack 8U 16U SNMP Module enables you to connect a PC to the hub to configure monitor and troubleshoot the hub C a u t i on To avoid possible damage to module or transceiver circuitry disconnect the power cabl...

Страница 14: ...d HP Transceiver Modules and their cabling configurations are described in their accompanying documentation HP J2608A ThinLAN Transceiver Module for 10Base 2 networks HP J2606A Fiber Optic Transceiver Module for 10Base FL networks HP J2607A Twisted Pair Transceiver Module for 10Base T networks HP J2609A AUI Port Module for connecting a standard IEEE 802 3 external transceiver to the hub Installing...

Страница 15: ...is plugged in To provide power to the hub follow these steps 1 Plug the power supply into the receptacle on the hub marked Power 2 Plug the ac power cord into an ac power source When installing the Hub 8U note that the ac outlet must be installed near the equipment and should be easily accessible Power receptacle on the back of the hub Example of an ac power cord for a U S outlet Plug the ac power...

Страница 16: ...nd nodes to these ports the hub has failed its self test See chapter 2 Troubleshooting for information about diagnosing your hub 4 After the hub has passed its self test you are ready to mount the hub Before mounting the hub unplug it 3 Mount the hub The HP AdvanceStack Hub 8U can be placed on a desk or mounted on any vertical or horizontal surface for example a wall or under a desk To locate the ...

Страница 17: ... same circuits and compare the total with the rating limits for the supply circuits Do not install the HP AdvanceStack hub in an environment where the operating ambient temperature might exceed 55 C 131 F Make sure the air flow around the sides of the hub is not restricted Marking the Location I m p o r t a n t A hub should be mounted only to a wall or wood surface that is at least 1 2 inch 12 7 m...

Страница 18: ...ttom of the hub against the screws For a horizontal mount under a surface such as a desk or table turn the hub upside down and gently place the hub up against the screws 2 Slide the hub in either of the two diagonal directions to secure the hub into place Actual size of number 6 by half inch or M3 x 12 mm pan head wood screw Installing the Hub Installing the Hub 1 8 ...

Страница 19: ...ections Connecting to another HP AdvanceStack Hub or other Ethernet hub Hub to network backbones Connecting to a network backbone This section describes the different ways you can connect your hub to your network Connecting Devices to the Hub To connect a device to the hub push the RJ 45 plug into the RJ 45 jack until the tab on the plug clicks into place RJ 45 plug unshielded twisted pair cable t...

Страница 20: ... and Rx port pins for you This allows you to use straight through cable rather than cross over cable to connect two hubs together In the MDI X position use Port 1 to connect your hub to a PC or similar device using straight through cable In the MDI X position the switch is exposed by 0 10 inches 2 5 mm in front of the bezel C a u t i on You must disconnect the device connected to Port 1 before cha...

Страница 21: ...llowing illustration shows a hub with an HP ThinLAN Transceiver Module connected to a ThinLAN backbone Up to 100 meters PC attached to Port 1 switch in MDI X position and straight through cable is used Hub attached to Port 1 switch in MDI position and straight through cable is used HP J2608A ThinLAN Transceiver Module installed in the AUI Xcvr Slot thin coax cable 50 ohm terminator Installing the ...

Страница 22: ...ement through the entire segment is only two The following illustration shows you how to connect three hubs together from one ThinLAN port to another Connecting Hubs to Network Backbones Connecting the Hub 8U to a ThinLAN Backbone The optional ThinLAN Transceiver Module has a BNC 10Base 2 port that can be used to connect your hub to a ThinLAN backbone ThinLAN coax connecting the hubs together Hub ...

Страница 23: ...he following illustration shows a hub with an HP Fiber Optic Transceiver Module connected to a fiber optic backbone For more information about cabling configuration see the documentation accompanying the optional transceiver modules See the Designing HP AdvanceStack Networks guide for information on valid network topologies ThinLAN backbone HP J2606A Fiber Optic Transceiver Module installed in the...

Страница 24: ...ub to an ASCII console optional The optional HP AdvanceStack 8U 16U SNMP Module enables you to configure monitor and troubleshoot the hub from an ASCII console ASCII console Installing the Hub Installing the Hub 1 14 ...

Страница 25: ...2 Troubleshooting Troubleshooting Approaches Diagnosing with the LEDs Installation Problems Cabling Problems Unusual Network Activity Diagnostic Tests Customer Support Services Replacement Instructions ...

Страница 26: ...ary ways to diagnose hub problems By checking the LEDs on the front of the hub as described in Diagnosing with the LEDs later in this chapter By visually inspecting the unit and all its connections as described in the Installation Problems and Cabling Problems sections later in this chapter By using the ASCII console s diagnostic functions as described in the documentation shipped with the HP Adva...

Страница 27: ...led the AUI Xcvr LED turns off When the self test completes successfully the LEDs go into their normal operational states If a hub hardware fault exists the hub will not complete self test This will be indicated by an abnormal LED pattern The display of the Port LEDs pattern depends on whether the HP AdvanceS tack 8U 16U SNMP Module is installed If you have an HP AdvanceStack 8U 16U SNMP Module in...

Страница 28: ...t Faulty wiring or a bad connection could exist somewhere in that connection The end node or hub attached to the port is off If you have an HP AdvanceStack 8U 16U SNMP Module installed see the module manual If port 1 check the position of the MDI MDI X switch For hub to hub connections set the switch to MDI For hub to PC connections set the switch to MDI X ON OFF Verify that the HP Transceiver Mod...

Страница 29: ...as been auto partitioned because of an excessive collision condition Check cable connections and status of attached network devices for causes of the excess collisions ON Slow Flash The transceiver port has been auto partitioned because of too many collisions Check cable terminations connections SQE setting on any external transceivers and status of attached network devices for causes of the exces...

Страница 30: ...e component correctly Cabling Problems A high percentage of network problems are due to faulty cabling Cabling problems usually result in the failure of a hub to connect to a network another hub or the end nodes Connections All cables attached to the hub should be checked to see that they are properly connected Proper network connections are described in chapter 1 Installing the Hub Properly conne...

Страница 31: ...fter recent changes to a network switch back to the previous topology If you no longer have any trouble the new topology is probably at fault Refer to the guide entitled Designing HP AdvanceStack Networks for topology configuration guidelines Contact your HP authorized LAN dealer or local HP sales office to get a copy of this guide Unusual Network Activity Network activity that exceeds accepted no...

Страница 32: ...tion from the ASCII console or press the Reset button on the module Each of these procedures will power cycle the hub and execute its self test If all of the Port LEDs stay on after 3 seconds the hub may have failed its self test See Diagnosing with the LEDs earlier in this chapter to interpret the LED display C a u t i on Cycling power on the hub will temporarily disable the network and could hav...

Страница 33: ...Link Test option from the card s test program to verify the entire communi cation path between the two PCs In the following illustration two computers are connected together with twisted pair cable to two different ports on the hub See your LAN adapter card s manual for information on running an end to end communication test With the AdvanceStack 8U 16U SNMP module you can also run a Link test dir...

Страница 34: ...l surface or wear an anti static wrist strap that is attached to grounded metal To prevent generating static electricity minimize your movement around the work area or work in an anti static work area Handle the module carefully at all times Avoid flexing it or touching its components The faulty hub should be returned to Hewlett Packard with the AUI Xcvr and management slots empty and the cover pl...

Страница 35: ...d Wide Web Hewlett Packard FTP Library Service on the Internet CompuServ Hewlett Packard BBS HP FIRST FAX Retrieval Service HP Network Phone In Support NPS SNMP firmware for the AdvanceStack 8U 16U SNMP module j3133a exe is available through several of the above services Refer to the card at the front of this manual Troubleshooting Troubleshooting 2 11 ...

Страница 36: ......

Страница 37: ...3 Hub Reference Front of the Hub Back of the Hub Hub Operation ...

Страница 38: ...is being transmitted Normally the LED appears to flicker In heavy traffic it may appear on all the time Collision orange Flickering This LED is on while a collision is detected on any of the attached cable segments If collisions are infrequent which is normal the light may be imperceptible In a network with heavy traffic the LED will glow and flicker dimly indicating collisions are occurring If it...

Страница 39: ...ver Module is properly installed in the hub s back panel slot Off An HP Transceiver Module is not installed Slow Flash The HP Transceiver Module port has auto partitioned See Auto Partitioning later in this chapter Twisted pair Port green On Link beat is detected from the attached node Off The port is not receiving the link beat signal from the attached node Slow Flash The port has been auto parti...

Страница 40: ...ment slot is used to add an HP J3133A AdvanceStack 8U 16U SNMP Module For more information see the Install Add in Modules section in chapter 1 AUI Xcvr Slot The AUI Xcvr Slot is used to add an HP Transceiver Module For more information see the Install Add in Modules section in chapter 1 Hub Reference Hub Reference 3 4 ...

Страница 41: ...dition is removed the hub stops transmitting the jamming signal and normal operation is resumed Auto Partitioning The hub will automatically partition temporarily disable one of its ports if a collision condition exists for an excessive duration between 1024 and 2048 bit times or occurs during each of 32 consecutive attempts to transmit The hub monitors the partitioned port and automatically re en...

Страница 42: ...se This signal informs the hub of the presence of a device connected to it over twisted pair cable and of the integrity of the twisted pair link between them The hub will not transmit packets out of twisted pair ports that do not sense the link beat signal Hub Reference Hub Reference 3 6 ...

Страница 43: ...A Cables and Connectors Recommended Cables Twisted Pair Cable Connector Pin Outs ThinLAN Requirements ...

Страница 44: ...red cabling is the most common cause of problems for LAN communications HP recommends that you work with a qualified LAN cable installer for assistance with your cabling requirements Recommended Cables Cable Function Cable Type HP Product Number Network connections to the hub Hub to end node connection or hub to hub connection using the MDI MDI X switch Twisted pair straight through cable 92268A 4...

Страница 45: ... cable The wiring sequence must conform to AT T 258A not USOC See Twisted Pair Cable Pin Assignments later in this chapter for a listing of the signals used on each pin N o te Pins 1 and 2 must be a twisted pair Pins 3 and 6 must be a twisted pair Pins 4 5 7 and 8 are not used in this application although they may be wired in the cable Straight through cable white orange orange white white green g...

Страница 46: ...le Requirements If you add an HP J2608A ThinLAN Transceiver Module the thin coaxial cables used with the module must comply with the IEEE 802 3 Type 10Base2 requirements Some RG 58 A U or RG 58 C U cables meet these requirements The maximum length of a single thin coaxial cable segment is 185 meters The minimum length for example to connect adjacent hubs in a rack is 0 5 meter Cables and Connector...

Страница 47: ...B Specifications Physical Electrical Environmental Connectors Electromagnetic ...

Страница 48: ...re 0 C to 55 C 32 F to 131 F 40 C to 70 C 40 F to 158 F Relative humidity non condensing 15 to 95 at 40 C 104 F 15 to 90 at 65 C 149 F Maximum altitude 4 6 km 15 000 ft 4 6 km 15 000 ft Connectors The RJ 45 twisted pair ports are compatible with the IEEE 802 3 Type 10Base T standard Safety Complies with IEC 950 1991 A1 A2 EN60950 I 1992 A1 A2 UL1950 CSA 950 NOM 019 SCFI 1994 NOM 001 SCFI 1993 Spec...

Страница 49: ...55022 Class A CISPR 22 Class A VCCI Level I Complies with Canadian EMC Class A requirements Immunity See the Declaration of Conformity for details at the end of the Regulatory Statements Accoustic Noise Not applicable Specifications Specifications B 3 ...

Страница 50: ......

Страница 51: ...C Safety and Regulatory Statements This chapter covers the following topics Safety and Regulatory Statements Declaration of Conformity ...

Страница 52: ...l denotes a hazard that can damage equipment Do not proceed beyond a WARNING or CAUTION notice until you have understood the hazardous conditions and have taken appropriate steps Servicing There are no user serviceable parts inside these products Any servicing adjustment maintenance or repair must be performed only by service trained personnel These products do not have a power switch they are pow...

Страница 53: ...un danger susceptible de causer des dommages à l équipement Ne continuez pas au delà d une rubrique WARNING ou CAUTION avant d avoir bien compris les conditions présentant un danger et pris les mesures appropriées Aucune pièce contenue à l intérieur de ce produit ne peut être réparée par l utilisateur Tout dépannage réglage entretien ou réparation devra être confié exclusivement à un personnel qua...

Страница 54: ... der Dokumentation symbolisiert eine Gefahr die das Gerät beschädigen kann Fahren Sie nach dem Hinweis WARNING oder CAUTION erst fort nachdem Sie den Gefahrenzustand verstanden und die entsprechenden Maßnahmen ergriffen haben Dieses Gerät enthält innen keine durch den Benutzer zu wartenden Teile Wartungs Anpassungs Instandhaltungs oder Reparaturarbeiten dürfen nur von geschultem Bedienungspersonal...

Страница 55: ...o che può danneggiare le attrezzature Non procedere oltre un avviso di WARNING o di CAUTION prima di aver compreso le condizioni di rischio e aver provveduto alle misure del caso Nessun componente di questo prodotto può essere riparato dall utente Qualsiasi lavoro di riparazione messa a punto manutenzione o assistenza va effettuato esclusivamente da personale specializzato Questo apparato non poss...

Страница 56: ...mentación señala un riesgo que podría resultar en averías al equipo No proseguir después de un símbolo de WARNING o CAUTION hasta no haber entendido las condiciones peligrosas y haber tomado las medidas apropiadas Este aparato no contiene pieza alguna susceptible de reparación por parte del usuario Todas las reparaciones ajustes o servicio de mantenimiento debe realizarlos solamente el técnico Est...

Страница 57: ...Safety Information Safety and Regulatory Statements Safety Information 7 ...

Страница 58: ...esidential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference If this equipment causes interference to radio reception which can be determined by unplug ging the power cord from the equipment try these measures Re orient the receiving antenna Relocate the equipment with respect to the...

Страница 59: ...Safety and Regulatory Statements Regulatory Statements 9 ...

Страница 60: ...dvanceStack Hub 8U complies with ISO IEC Guide 22 and EN 45014 The declaration identifies the product the manufacturer s name and address and the applicable specifi cations that are recognized in the European community Safety and Regulatory Statements 10 Declaration of Conformity ...

Страница 61: ...Index ...

Страница 62: ...laration of Conformity C 10 description iii diagnosing with the LEDs 2 3 diagnostic tests 2 8 testing the hub only 2 8 testing twisted pair cabling 2 8 E electrical specifications B 2 electromagnetic specifications B 2 environmental specifications B 2 C 2 Ethernet networks iii external power supply 1 2 F fax using to get HP product information 2 11 features v fiber optic backbone 1 13 front of the...

Страница 63: ...onditions 2 4 Power 3 2 twisted pair ports 3 3 verifying hub operation 1 6 link beat description 3 6 list included parts 1 2 M management slot 3 4 managing the hub 1 14 MDI switch using 1 10 MDI X switch using 1 10 mounting brackets ordering 1 8 mounting the hub 1 7 precautions 1 7 under a desk 1 8 wall mounting 1 7 N Network backbones 1 12 network connections hub to hub connections 1 10 port conn...

Страница 64: ...ansceiver modules part of hub installation 1 3 troubleshooting approaches 2 2 ASCII console 2 8 cabling problems 2 6 diagnosing with the LEDs 2 3 diagnostic tests 2 8 installation problems 2 6 LED pattern during power on 2 3 LED patterns showing errors 2 4 testing the hub 2 8 testing the twisted pair cables 2 8 topology faults 2 7 unusual network activity 2 7 twisted pair cable hub to computer con...

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Страница 67: ... 1997 Hewlett Packard Company Printed in U S A 7 97 Manual Part Number J2610 90201 Edition 1 J2610 90201 H ...

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