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HP 100Base-T Hub 8 Installation and Reference Guide

Troubleshooting

A-3

Hub Integrity

As a last resort verify the hub’s integrity with a power-on reset. Turn the
power to the hub off and then on a few times. If the problem still persists
and you have completed all the preceding diagnoses, contact your HP-
authorized dealer or reseller for further assistance.

100hub8.book : 100hub8A.fm Page 3 Monday, April 27, 1998 10:06 AM

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Summary of Contents for J4091A

Page 1: ...Installation and Reference Guide HP J4091A HP ProCurve 100Base T Hub 8 ...

Page 2: ...ANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Hewlett Packard shall not be liable for errors con tained herein or for incidental or consequential damages in connection with the fur nishing performance or use of this material Hewlett Packard assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Hewlett Packard Warranty See the warranty booklet ...

Page 3: ... 3269 Europe Russia 0950 3268 China 0950 2809 Japan 0950 3267 United Kingdom Hong Kong 0950 3270 U S Canada Mexico Taiwan Brazil Columbia 0950 3274 æ Four rubber foot pads æ Installation and Reference Guide J4091 90001 æ Warranty booklet æ README notice Please inform your dealer immediately should there be any wrong missing or damaged parts If possible retain the carton including the original pack...

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Page 5: ...0 4 Connect any devices that use a standard network interface to the RJ 45 MDI X ports e g a workstation server bridge or router Use 100Ω Category 5 STP or 100Ω Category 5 UTP cable to connect to the hub and be sure the length of any twisted pair connection does not exceed 100 meters Refer to Chapter 3 for sample configurations 5 To cascade to another hub or switch run straight through twisted pai...

Page 6: ...s the hub s indicators show link status 9 If you encounter any problems in installing the HP 100Base T Hub 8 refer to Chapter 2 for a detailed description of installation procedures Chapter 3 for sample configurations or Appendix A for help in troubleshooting Note Refer to Chapter 2 for a more detailed description of calculating the maximum cable length permitted between two end nodes for Fast Eth...

Page 7: ...view Brief description of this hub and a summary of its important features and specifications Chapter 2 Installing the System Installing an HP 100Base T Hub 8 and making basic network connections Chapter 3 Configuring the Network Sample network configurations for a local area network Chapter 4 Hardware Reference Detailed description of indicator panel and ports Appendices Troubleshooting cable ass...

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Page 9: ...istance Limit for Fast Ethernet Cabling 2 3 Providing Power to the Hub 2 4 Verifying Port Status 2 4 Verifying System Operation 2 5 Chapter 3 Configuring the Network 3 1 Standalone 3 1 Connecting Multiple Hubs 3 2 Chapter 4 Hardware Reference 4 1 Front Panel 4 1 Pwr 4 2 Statistical Display for System Performance 4 2 Port Status Display 4 3 RJ 45 100Base T Ports 4 5 Rear Panel 4 5 Power Connector 4...

Page 10: ...y and Regulatory Statements D 1 Mounting Precautions D 1 Power Precautions D 2 Safety Information D 3 Informations concernant la sécurité D 4 Hinweise zur Sicherheit D 5 Considerazioni sulla sicurezza D 6 Consideraciones sobre seguridad D 7 Safety Information Chinese D 8 Safety Information Japanese D 9 Regulatory Statements D 10 Declaration of Conformity D 14 Glossary Index ...

Page 11: ...one Configuration 3 1 Figure 3 2 Multiple Hub Configuration Using the Cascade Port 3 2 Figure 4 1 Front Panel 4 1 Figure 4 2 Indicators 4 2 Figure 4 3 Rear Panel 4 5 Figure B 1 RJ 45 Connector on the Hub Side B 1 Tables Table A 1 Problems and Solutions A 1 Table B 1 RJ 45 Pin Assignments B 1 ...

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Page 13: ...bling Fast Ethernet can be easily integrated into an existing 10 Mbits s Ethernet environment with no need for protocol translation or changes to network software HP ProCurve 100Base T Hub 8 The HP J4091A ProCurve 100Base T Hub 8 is an 8 port Class II repeater With this type of hub you can connect computers and other devices together in an twisted pair cable network This hub is compliant with the ...

Page 14: ...guards including automatic partitioning and reconnection jabber lockup protection and automatic polarity detection for network cabling With automatic partitioning and reconnection any port is automatically isolated if excessive collisions occur on it When the condition is cor rected the port is automatically reconnected With the jabber lock up function the hub automatically stops transmis sion of ...

Page 15: ...nected Verify the following installation requirements Power connector requirements 13 19 Vdc 800 mA Power source One of the following external power adapters Specifications shown on adapter label The hub should be located in a cool dry place with at least 10 cm of space at the front and back for ventilation Place the hub out of direct sunlight and away from heat sources or areas with a high amount...

Page 16: ...lso to a network interconnection device such as a bridge or router depending on the port type implemented 1 Prepare the network devices you wish to network Make sure you have installed suitable 100Base T network interface cards for making a connection to any of the hub s ports You also need to prepare straight through shielded or unshielded twisted pair cables with RJ 45 plugs at both ends Use 100...

Page 17: ...ation delay to the packet which can be equated to a certain number of bit times The propagation delay repeater delay of the HP 100Base T Hub 8 is 80 bit times or a cable equivalent length of 72 meters The 100Base T maximum cable distance network diameter is 367 meters And the maximum distance from a hub to an end node is 100 meters To cascade two HP 100Base T Hub 8s together we must do this calcul...

Page 18: ...the power adapter is plugged in Caution Use only the power adapter that is supplied with the hub Use of other adapters including those meant for other HP network products may result damage to the equipment and will void the warranty Verifying Port Status Check each connection by viewing the port status indicators listed below For a more detailed description of these indicators refer to Chapter 4 L...

Page 19: ...J 45 plug snaps into place when attached Verify that if the cable is connected to an MDI X port on the hub the other end must be to an MDI port of the network device and vice versa Test by alternately connecting to the 8MDI and 8MDI X ports See if the twisted pair cable is functioning properly by using it for another port and attached device that already displays valid indications when connected t...

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Page 21: ...multiple hub configuration Some of the common applications for this Fast Ethernet hub are described in this chapter Standalone This hub can be used in a simple standalone configuration as illustrated below In compliance with IEEE 802 3u standards the maximum cable distance between the hub and any workstation is 100 meters for twisted pair cable Figure 3 1 Standalone Configuration ...

Page 22: ...nd Reference Guide 3 2 Configuring the Network Connecting Multiple Hubs You can easily connect to another hub via the MDI cascade port Figure 3 2 shows a sample configuration Figure 3 2 Multiple Hub Configuration Using the Cascade Port ...

Page 23: ...e 8 RJ 45 MDI X ports and 1 RJ 45 MDI cascade port on the front panel Moreover the system indicators provide a simple interface for monitoring the hub The front panel includes a power indicator a statistical display for network traffic a collision indicator and port status indicators as shown below Figure 4 1 Front Panel The indicator panel simplifies monitoring of various network conditions by pr...

Page 24: ...tem Performance Utilization Utilization The statistical indicators show the percentage of valid data passing through all ports compared to overall network bandwidth updated every 0 5 seconds There are 6 LEDs representing the percentage of network utilization The corresponding LEDs light up to show that the utilization of LAN bandwidth has reached this level When active these LEDs behave like a ste...

Page 25: ...he Col indicator Note If the hub displays a high collision rate check to see if any of the connected devices are malfunctioning or if a loop has been formed in your network connections Otherwise you may need to reconfigure your network to balance the traffic load Port Status Display Link Activity Color Green Function Detects a successful connection to another hub or end node on this port Detects p...

Page 26: ...t is automatically partitioned the port continues to receive data from the segment However data is not transmitted onto the segment When the problem is corrected or a valid data packet is received through the port the port is automatically reconnected When partitioning occurs the port s corresponding Partition LED will be continually lit yellow light Otherwise this LED should be OFF unlit Note Whe...

Page 27: ... MDI X and port 8 MDI at the same time Note Use Category 5 straight through twisted pair cable STP or UTP for all standard connections However if you must cascade between two hubs using similar port types at both ends of the cable use a crossover cable Rear Panel The rear panel on the hub includes a power connector Figure 4 3 Rear Panel Power Connector The power connector accepts range 13 19 Vdc 8...

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Page 29: ...D is still not on use the Test Link option in the user s LAN Adapter test program to verify the communication path between two PCs connected to the hub is working Connect a different cable from the end user to the hub Perform a self test on the LAN adapter in the user s computer and or the device that can not be reached Verify cable lengths do not exceed 100 meters I have tried every thing but the...

Page 30: ...aight through cable for all standard twisted pair connections 2 Make sure all devices are connected to the network Equipment may have been unintentionally disconnected from the network 3 When cascading two devices using RJ 45 ports at both ends of the cable i e not the MDI port make sure a crossover cable is used A cross over cable should only be used if a cascade port is not available LAN Adapter...

Page 31: ...ntegrity As a last resort verify the hub s integrity with a power on reset Turn the power to the hub off and then on a few times If the problem still persists and you have completed all the preceding diagnoses contact your HP authorized dealer or reseller for further assistance ...

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Page 33: ...r cable are shown below RJ 45 Port Pin MDI X Assignment Port 1 8 MDI Assignment Cascade Port 8 1 Receive Data Transmit Data 2 Receive data Transmit Data 3 Transmit Data Receive Data 6 Transmit Data Receive data 4 5 7 8 Not Used Not Used Straight Through Crossover 1 IRD 2 IRD 3 OTD 6 OTD 1 OTD 2 OTD 3 IRD 6 IRD 1 IRD 2 IRD 3 OTD 6 OTD 1 OTD 2 OTD 3 IRD 6 IRD Hub Adapter Hub Hub ...

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Page 35: ...m x 116 mm x 36 mm 7 72 x 4 57 x 1 42 Weight 635 grams 1 4 pounds Power Input Range 13 19 Vdc 0 8 Amp max Temperature 0 C to 55 C 32 to 131 F Operating 40 C to 70 C 40 to 158 F Non Operating Humidity Noncondensing 15 to 80 at 40 C 104 F Operating 15 to 95 at 40 C 104 F Non Operating Maximum Altitude 4 6 km 15 000 ft Operating 4 6 km 15 000 ft Non Operating Certification CE Mark Emissions FCC Class...

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Page 37: ...ched to the hub and the ports that will be used Verify that there is room for the grouped cables to trail out from the side of the hub Allow at least 2 54 cm 1 inch in the front of the hub In the back of the hub allow at least 3 8 cm 1 1 2 inches of space for the power cord Ensure that the HP 100Base T Hub 8 does not overload the power cir cuits wiring and over current protection To determine the ...

Page 38: ...he hub in an environment where the operating ambient tempera ture might exceed 45 C 113 F Power Precautions Follow these precautions when unplugging and plugging in power to the hub Caution Use only the power adapter supplied with the HP 100Base T Hub 8 Using other adapters including those meant for other HP networking equipment may result in damage to the equipment and will void the warranty Note...

Page 39: ... to hazardous transient voltages such as lightning or disturbances in the electrical utilities power grid Handle exposed metal components of the network with caution 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 powered on when ...

Page 40: ...tensions transitoires dangereuses telles que la foudre ou des per turbations dans le réseau d alimentation public Manipulez les com posants métalliques du réseau avec précautions 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 qualifié Cet appareil ne comporte pas ...

Page 41: ...s Elektrizitätswerks Bei der Handhabung exponierter Metallbestandteile des Netzwerkes Vorsicht walten lassen Dieses Gerät enthält innen keine durch den Benutzer zu wartenden Teile Wartungs Anpassungs Instandhaltungs oder Reparaturarbeiten dürfen nur von geschultem Bedienungspersonal durchgeführt werden Dieses Gerät hat keinen Netzschalter es wird beim Anschließen des Netzkabels eingeschaltet Symbo...

Page 42: ... cavi LAN possono occasionalmente andare soggetti a pericolose ten sioni transitorie ad esempio provocate da lampi o disturbi nella griglia d alimentazione della società elettrica siate cauti nel toccare parti esposte in metallo della rete Nessun componente di questo prodotto può essere riparato dall utente Qualsiasi lavoro di riparazione messa a punto manutenzione o assistenza va effettuato esclu...

Page 43: ...posible que los cables de la LAN se vean sometidos de vez en cuando a voltajes momentáneos que entrañen peligro rayos o alteraciones en la red de energía eléctrica Manejar con precaución los componentes de metal de la LAN que estén al descubierto Este aparato no contiene pieza alguna susceptible de reparación por parte del usuario Todas las reparaciones ajustes o servicio de mantenimiento debe rea...

Page 44: ...HP 100Base T Hub 8 Installation and Reference Guide D 8 Safety and Regulatory Statements Safety Information Chinese ...

Page 45: ...HP 100Base T Hub 8 Installation and Reference Guide Safety and Regulatory Statements D 9 Safety Information Japanese ...

Page 46: ...ed cables This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause in...

Page 47: ... Safety and Regulatory Statements D 11 Japan VCCI Class A For Japan Only VCCI Class B For Japan Only Canada This product complies with Class A Canadian EMC requirements when using unshielded cables and Class B EMC requirements when using shielded cables ...

Page 48: ...for Class A products The bottom statement is for Class B products European Community This equipment complies with ISO IEC Guide 22 and EN55022 Class A with unshielded cables and EN55022 In a domestic environment this product may cause radio interfe ence in which case the user may be required to take adequate measures ...

Page 49: ...HP 100Base T Hub 8 Installation and Reference Guide Safety and Regulatory Statements D 13 Taiwan Australia New Zealand Complies with Australia New Zealand EMC Class A requirements ...

Page 50: ...claration of Conformity The following Declaration of Conformity for the HP J4091A ProCurve 100Base T Hub 8 complies with ISO IEC Guide 22 and EN 45014 The declaration identifies the product the manufacturer s name and address and the specifications that are recognized in the European community ...

Page 51: ...nterconnection service Cascade Port An MDI RJ 45 port used to cascade compatible devices in a cascade configuration using straight through twisted pair cable To cascade two devices either run a connection from the cascade port on one device to an MDI X port on the other device or cascade the two devices by running crossover cable between similar port types on both devices Fast Ethernet 100 Mbit s ...

Page 52: ... hub to any device that has a standard network interface e g workstation server bridge or router Pin out assignments are shown in Appendix B RJ 45 Connector Most common terminator for twisted pair wiring Shielded Twisted Pair STP Twisted pair wire covered with an external aluminum foil or woven copper shield designed to reduce excessive noise pick up or radiation The STP cable refered to in this m...

Page 53: ...00Base T Hub 8 Installation and Reference Guide Glossary 17 Unshielded Twisted Pair UTP Cable composed of two insulated wires twisted together to reduce electrical interference used in common telephone cord ...

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Page 55: ...orts 2 2 procedures 2 2 verifying 2 5 crossover cable B 1 D daisy chain port 1 1 E Ethernet ports 4 5 F Fast Ethernet introduction 1 1 features product 1 1 front panel 4 1 H hardware description 4 1 hub power 2 4 hub specifications C 1 I indicator panel 4 2 installation requirements 2 1 J jabber lockup 1 2 L LED indicators Col 4 3 Link 2 5 Link Activity 4 3 Partition 4 4 Pwr 4 2 Link indicator 2 5...

Page 56: ...eatures 1 1 R rear panel 4 5 regulatory information D 1 repeater delay 2 3 requirements environmental 2 1 location 2 2 power 2 1 resetting the hub A 3 S safety information D 1 specifications C 1 standalone configuration 3 1 status LEDs 4 2 system operation verifying 2 5 system performance display 4 2 T troubleshooting cabling A 2 configuration A 2 hub indicators A 1 installation A 2 twisted pair c...

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