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Troubleshooting

This chapter describes ways to troubleshoot the hub. Topics covered are:

■

troubleshooting approaches

■

using a checklist to diagnose the hub

■

interpreting the LED pattern during self test

■

hub maintenance tasks

Troubleshooting Approaches

There are three primary ways to diagnose hub problems:

■

By checking the LEDs on the front of the hub as described in the section,
“Using a Checklist to Diagnose the Hub” later in this chapter.

■

By using the ASCII console’s diagnostic functions as described in chapter
3, “Managing the Hub.”

■

By using the CiscoView network management application as described in
the CiscoView online help.

MUCHO.BK : ch2.fm5 Page 1 Thursday, June 26, 1997 11:37 AM

Summary of Contents for J3188A

Page 1: ...Installation and Reference Guide HP J3188A HP 10Base T Hub 16M MUCHO BK cvrf r1 ft5 Page 1 Thursday June 26 1997 11 37 AM ...

Page 2: ...MUCHO BK cvrf r1 ft5 Page 2 Thursday June 26 1997 11 37 AM ...

Page 3: ...HP 10Base T Hub 16M J3188A Installation and Reference Guide MUCHO BK ch0 fm5 Page i Thursday June 26 1997 11 37 AM ...

Page 4: ...t notice HEWLETT PACKARD COMPANY MAKES NO WARRANTY OF ANY KIND WITH REGARD 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...

Page 5: ...ng the hub s port LED when it detects the connected device is powered on and cable is good retransmitting data that did not successfully arrive at the destination device collision detection temporarily disabling a port if a device connected to the port persistently causes problems for the network auto partioning Twisted Pair port status LEDs RPS Status Twisted pair ports MDI MDI X switch for port ...

Page 6: ...ded SNMP agent code enabling the hub to be managed remotely from a network management station that supports Simple Network Management Protocol SNMP over IP using the configured IP address or Novell NetWare IPX TheagentcodealsoprovidesHPEASE EmbeddedAdvancedSamplingEnvironment which samples network data for enhanced diagnostics from a network management station Other Features Extended hub managemen...

Page 7: ... Status 1 11 Interpreting Hub Status LEDs 1 12 Interpreting Port Status LEDs 1 13 2 Troubleshooting Troubleshooting Approaches 2 1 Using a Checklist to Diagnose the Hub 2 2 LED Operation 2 3 Hub Maintenance Tasks 2 5 Testing the Hub Only 2 5 Clearing a Password for the ASCII Console 2 5 Running Connectivity Tests 2 6 Obtaining Firmware Enhancements 2 6 3 Managing the Hub Setting up the ASCII Conso...

Page 8: ... 1 Electrical B 1 Environmental B 1 Connectors B 2 Electromagnetic B 2 C Modem Configuration D Network Addressing Communication Between the Hub and Network Management Station D 1 IPX Addressing for Novell NetWare D 2 IPX Addressing Notes D 2 IP Addresses for IP and Non IP Networks D 2 Globally Assigned IP Network Addresses D 2 Device IP Configuration D 3 Using BOOTP D 4 The BOOTP Process D 4 BOOTP...

Page 9: ...avesdrop Prevention Works F 2 Authorized MAC address F 2 Setting Inbound Security with Intruder Prevention F 4 Auto Port Disable F 5 Send Alarm F 5 Setting Outbound Security with Eavesdrop Prevention F 6 G Safety and Regulatory Statements Mounting Precautions G 1 Power Precautions G 2 Safety Information G 3 Informations concernant la sécurité G 4 Hinweise zur Sicherheit G 5 Considerazioni sulla si...

Page 10: ...MUCHO BK mucho TOC Page viii Thursday June 26 1997 11 37 AM ...

Page 11: ...er describes how to install the hub Topics in this chapter include installing and configuring the hub connecting devices to the hub connecting hubs together interpreting hub LEDs MUCHO BK ch1 fm5 Page 1 Thursday June 26 1997 11 37 AM ...

Page 12: ... 1378 power cord Accessory kit 5064 2053 bumper feet 4 hub to rack screws 10 32 4 bracket to hub screws 10 32 4 nylon finishing washer 4 bracket to hub screws 2 AUI retainer assembly 2 Connect the external transceiver Because of the way the external transceiver protrudes out from hub once it is connected you may want to install the external transceiver before installing the hub Inspect your instal...

Page 13: ... is the primary power source for the hub disconnect the AC power cord connected directly to the hub for proper operation No te The hub does not have a power switch it is powered on when the power cord is plugged in HP recommends that you only use one power source at a given time If not connecting a Redundant Power Supply connect included power cord here and to an alternating current power source O...

Page 14: ...will be indicated by an abnormal LED pattern If the self test time elapses and the Fault LED continues to stay on instead of turning off the hub may have an error condition If repeating the self test does not correct the problem and the Fault LED still stays continu ously on contact your reseller for replacement information After the hub has passed its self test you are ready to mount the hub LED ...

Page 15: ...lling over Please see Appendix G Safety andRegulatoryStandards forprecautionsandwarningsassociatedwithrack mounting 1 Using a Phillips T 10 screwdriver attach the mounting brackets to the hub with 10 32 x 7 16 silver screws included in the accessory kit 2 Position the hub in the rack or cabinet and slide it up or down until the rack holes line up with the bracket holes 3 Then attach the hub to the...

Page 16: ...ntal surface no special tools are necessary Apply the four feet included in the accessory kit onto the bottom of the hub Be certain to pick a sturdy table in an uncluttered area You may want to secure the hub s cables to the leg of the table to prevent people from tripping over them MUCHO BK ch1 fm5 Page 6 Thursday June 26 1997 11 37 AM ...

Page 17: ... now ready to connect the hub to your network Typical hub connections are hub to device connections Connecting to network devices such as computers and printers hub to hub connections Connecting to another HP 10Base T 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 MUCHO BK ch1 fm...

Page 18: ... the twisted pair cable connected to Port 16 The hub is shipped with the switch in the MDI X position The switch has two positions In the MDI position use Port 16 to connect your hub to another hub In thisposition the hub reversesthe Tx andRx portpairsforyou Thisallows you to use straight through cable rather than cross over cable to connect two hubs together The cable can be up to 100 meters in l...

Page 19: ...LAN Connections With an HP ThinLAN External Transceiver for 10Base2 networks you can connect your hub or a stack of hubs to a thin LAN network The following illustration shows a hub with an HP ThinLAN External Transceiver Hub attached to Port 16 switch in MDI position and straight through cable is used Up to 100 meters PC attached to Port 16 switch in MDI X position and straight through cable is u...

Page 20: ...he module the maximum repeater hop count increment through the entire segment is only two The following illustration shows you how to connect three hubs together from one ThinLAN port to another No te Each ThinLAN cable segment must be terminated using a 50 ohm terminator at each end In the illustration above a 50 ohm terminator is placed at each end of the cable segment ThinLAN coax connecting th...

Page 21: ...configuration see the documentation accompanying the optional transceiver modules Interpreting LED Status Two types of LEDs exist on the hub They are Hub Status LEDs These LEDs reflect certain conditions that exist on the hub at large and are not explicitly referring to a given port Port Status LEDs These LEDs reflect basic conditions for example Link Beat being enabled that exist on a specific po...

Page 22: ...all the time FLT Fault Orange On Off Flash An error has been detected on the hub No error has been detected on the hub Flashes simultaneously with port LEDs indicating the port is partitioned SEC Security Orange On Off Flash A security violation has occurred Hub security has not been violated Flashes simultaneously with port LEDs indicating the port had a security violation RPS RPS green On Off Th...

Page 23: ...iving the link beat signal from the attached node Slow Flash The port has been auto partitioned This port has been auto partitioned disabled duetoexcessivecollisions Thisportwill reenable when the connected device no longer causes collisions AUI Port green On The AUI port is enabled Off The AUI port is disabled Slow Flash The port has been auto partitioned The slow flash is approximately once ever...

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Page 25: ...pproaches There are three primary ways to diagnose hub problems By checking the LEDs on the front of the hub as described in the section Using a Checklist to Diagnose the Hub later in this chapter By using the ASCII console s diagnostic functions as described in chapter 3 Managing the Hub By using the CiscoView network management application as described in the CiscoView online help MUCHO BK ch2 f...

Page 26: ...adifferent outlet or try a different power cord If this condition persists call your HP authorized LAN dealerorHP representative for assistance I lost the password Pressthepasswordresetbuttonfor10seconds See page 2 4 for more details IP configuration errors have been reported Use the ASCII console s IP Configuration function as described in the chapter 3 Managing the Hub Iwanttoseeifeachcableiscon...

Page 27: ...nto a different outlet or try a different power cord If this condition persists call your HP authorized LAN dealer or HP representative for assistance ON OFF Check cabling on the indicated port all the way out to the device attached to that port Faulty wiring or a bad connection could exist somewhere in that connection The end node or hub attached to the port is off The port may be disabled Use th...

Page 28: ...uccessfully met ON Fast Flash Network management security violation occurred See SEcure command for details ON ON The hub has failed its self test Power cycle the hub If this condition persists call your HP authorized LAN dealer or HP representative for assistance ON OFF The internal power supply is operating properly and the RPS is not being used ON ON The internal power supply has failed or has ...

Page 29: ...This procedure will cause the hub to complete its power on self test If any error conditions exist in the hub the LEDs should display the condition Clearing a Password for the ASCII Console You can use the Password Reset button to clear a forgotten console password that was previously configured on the hub The password is configured from the ASCII console To clear the password follow these steps 1...

Page 30: ...ning Firmware Enhancements In the future Hewlett Packard may provide improvements to this product through firmware upgrades The upgrade code can be downloaded from a PC attached to the hub s RS 232 port or over the network The update procedures are described in documents that come with the firmware enhancements You can determine the current firmware version on the hub from the ASCII console Look f...

Page 31: ...work management product except HP AdvanceStack Assistant Setting up the ASCII Console You can begin a console session in the hub in the following ways directly using a serial cable and a terminal or a PC using a terminal emulator remotely using Telnet remotely using a modem and a terminal The HP Hub 16M supports a single console session only If a console session is already running a second console...

Page 32: ... when you press Enter Remotely Using Telnet The HP Hub 16M supports a Telnet console session Your Telnet syntax depends on your TCP IP software or your terminal server By default Telnet is enabled You can disable Telnet by using the IPconfig console command described on page 3 7 To establish a Telnet session follow these steps 1 Verify that the hub has been configured with an IP address and that i...

Page 33: ...the modem instructions 5 Press Enter several times for the or Password prompt The baud rate for communication between the hub and the modem is set automatically when you press Enter Starting the Console The console session starts with a display similar to the following the actual version numbers may be different HP J3188A Hub 16M ROM A 01 00 EEPROM A 01 00 HW A 01 00 Use console commands for hub c...

Page 34: ...screen shown above or if you include a specific command the syntax and description of that specific console command For the cmd parameter use the first two letters of the command you wish to see Example HE ST This displays help for the Status command Indicates a required parameter Indicates an optional parameter Used as a separator between acceptable variable values For example SE port SHow CLear ...

Page 35: ...d It is not automatically re enabled When the primary port is re enabled the backup port is disabled automatically and returned to backup mode See the appendix on Backup Links This appendix also covers more information on backup links including requirements limitations and sample topologies BAckup Default Description Backup Port Disabled The port used for the backup link Enter the port ID Or enter...

Page 36: ...the network Replace bad cables and or transceiversifproblemspersist Rarely you may have a defective LAN adapter Late Collisions Number of collisions which went undetected by the sending end node Less than 1 of good packets Too many repeaters between end nodes or cables which are too long or bad cable CRC Alignment Errors Number of packets transmitted incorrectly and number of incorrectly aligned p...

Page 37: ... responsibility for the IP settings See Appendix D Network Addressing for information on setting the IP configuration No te At the end of the process of changing the IP configuration the hub will be reset This terminates the console session and disconnects the phone line if using a modem and resets the console port baud rate to be automatically sensed To restart a console session when the reset pr...

Page 38: ... the network and from its own MAC address physical address or Ethernet address See your Novell documentation for more information on IPX communications and addressing Using IP You can use IP by using one of the following methods using BOOTP by adding an entry for the hub in the BOOTP table on your BOOTP server and enabling BOOTP through the hub s console interface this is the default setting using...

Page 39: ...t using BOOTP to provide the hub s IP configuration you should set this parameter to NO Telnet access enabled YES Determine whether users are allowed to use Telnet to access the hub s console interface IP address 0 0 0 0 The IP address of the hub written in the format X X X X Each X is a decimal number between 0 and 255 separated by a decimal point This address will be used unless the BOOTP protoc...

Page 40: ...you want to restrict which management stations are allowed to manage the hub delete entry 0 Then add the allowed management stations with the A command At the interface prompt enter MA the current authorized managers list is displayed and you are prompted to add or delete an entry in the list or to enter E to end your editing To add an entry enter A at the prompt Enter the IP or IPX address of the...

Page 41: ...ation to be deleted Example To delete the entry made in the example above the steps would be Add entry A Delete entry D or End changes E D Enter ID of entry to delete 1 Add entry A Delete entry D or End changes E E The table entry with ID 1 would now be a blank line To enter a new value that will indicate how much time in seconds should lapse between transmissions of CDP messages Displays the curr...

Page 42: ...the hub from the ASCII console and from SNMP management stations will no longer be password protected A new password can be assigned from the ASCII console or CiscoWorks To test the path between the hub and another device that responds to IP packets The hub sends Internet Control Message Protocol ICMP Echo Request Ping packets to another node with the specified IP address and waits for Echo Respon...

Page 43: ... to repeat data If the hub is faulty at the end of the reset process the Fault LED will stay on This command also terminates the console session and disconnects the phone line if you are using a modem to access the console and resets the console port baud rate to be automatically sensed To restart the console session first re establish the phone link if used then press Enter several times for the ...

Page 44: ...n An additional parameter Disable port when intruder detected is set automatically by your selection of the address selection method See Auto Port Disable in Appendix F Security Information on this parameter Address selection method or authorized MAC address This is the method by which the hub automatically learns the address of the device that is authorized to use the port or you can enter a spec...

Page 45: ...dress a security violation has occurred In that case the port is automatically disabled and the Security and affected port LEDs flash An alarm is also sent to the authorized network management station s if the Send Alarm parameter is set to YES Port Security Off disables port security This is a convenient way to remove the port security It automatically sets the Send Alarm and Eaves drop Preventio...

Page 46: ...rity on a port at least one of the parameters Send Alarm or Eavesdrop Prevention must be set to ON Configuring Security on All Twisted Pair Ports To set or change the security configuration for all the twisted pair ports together enter SE ALL This method is most useful when you are using the same security configuration for all the twisted pair ports either at initial setup or when you want to chan...

Page 47: ... address or press Enter to retain the current value Continue this process until all of the ports are displayed If you do not want to configure all twisted pair ports note that you can terminate the address selection method by pressing Enter once In either case you are then prompted for the settings for the Send Alarm and Eavesdrop Prevention parameters as described on the next page Port ADDRESS SE...

Page 48: ... Disable Port parameter will be YES If the method is Continuous the Disable Port parameter is always automatically set to NO Clearing Security Violation Indicators Enter the command SE CL to clear any security violation indicators and to rearm the indicators to be ready for the next intrusion The indications are slightly different between port security violations and network management security vi...

Page 49: ...iolation Disable Port YES to re enable the port you must enter the port ON command for that port The Security Clear command does not remove the cause of the security violation for example the wrong device being attached to a port Until the cause is removed the violation can reoccur immediately after issuing the SE CL command It may appear as if the violation indication was never cleared Change the...

Page 50: ...es that the port is the primary link see the Backup command Port Status The status of each port ON means the port is enabled and is not auto segmented OFF means that the port has been disabled by the Port command or because of a security violation PARTITIONED means the port has been auto partitioned See Auto Partitioning in the chapter that provides information on the Product Description ON REVERS...

Page 51: ... The HP Hub 16M will respond with the correct packet You will be prompted for the 12 digit hexadecimal MAC address of the destination device You will then be prompted for the number of test packets to send If any errors are reported during this test there may be a fault on the link being tested or on the destination device For more information about testing network links see the chapter 2 Troubles...

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Page 53: ...out will function correctly Recommended Cables The following table shows PC connections to the RS 232 port Console PC connection to the RS 232 port Purpose Cable Description Part No Connecting the PC directly to the module s RS 232 port 9 pin male RS 232 9 pin female to 9 pin female null modem or cross over cable F1047 80002 or F1047 60901 or 5182 4794 25 pin male 25 pin female RS 232C 9 pin femal...

Page 54: ...e Function Cable Type HP Product Number Network connections to the hub Hub to end node connectionorhubto hub connection using the MDI MDI X switch Twisted pair straight through cable 92268A 4 pair 4 meters 92268B 4 pair 8 meters 92268C 4 pair 16 meters 92268D 4 pair 32 meters 92268N 4 pair 300 meters The maximum total length of any twisted pair segment is 100 meters MUCHO BK CA FM5 Page 2 Thursday...

Page 55: ...le The twisted pair wires must be twisted through the entire length of the cable The wiring sequence must conform to AT T 258A not USOC See Twisted Pair Cable Pin Assignments at the end of this chapter for a listing of the signals used on each pin No 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 wir...

Page 56: ...imum pin out information so if you wish to use an unlisted cable you can verify that the cables used in your installation are correctly wired Note that each pin out does not necessarily match the pin out for the corresponding HP cable but cables manufactured to follow the minimum pin out will function correctly No te Incorrectly wired cabling is the most common cause of problems for LAN communicat...

Page 57: ... Connection RS 232 Modem Cable PC end 9 pin male Hub end 9 pin male 2 2 Rx 3 3 Tx 5 5 GND Modem end 25 pin male Hub end 9 pin male Signal 2 3 Tx 3 2 Rx 4 7 RTS 5 8 CTS 6 6 DSR 7 5 GND 8 1 CD OR DCD 20 4 DTR 22 9 RI 23 DRS typically on V 24 European modems not connected MUCHO BK CA FM5 Page 5 Thursday June 26 1997 11 37 AM ...

Page 58: ...ors Twisted Pair Cable Pin Assignments Twisted Pair Straight Through Cable Hub End MDI X Computer or Transceiver End MDI Signal Pins Pins Signal receive receive transmit transmit 1 2 3 6 1 2 3 6 transmit transmit receive receive MUCHO BK CA FM5 Page 6 Thursday June 26 1997 11 37 AM ...

Page 59: ...Width 42 5 cm 16 8 in Depth 23 8 cm 9 4 in Height 4 36 cm 1 7 in Weight 8 lbs and 7 oz 8 7 lbs ac voltage 100 127 volts 200 240 volts Maximum current 0 3A max 0 2A max Frequency range 50 60 Hz 50 60 Hz Operating Non Operating Temperature 5 C to 45 C 23 F to 113 F 40 C to 70 C 40 F to 158 F Relative humidity non condensing 10 to 95 at 40 C 104 F 10 to 90 at 65 C 149 F Maximum altitude 3 000 m 9 843...

Page 60: ...EN 55022 Class A CISPR 22 Class A VCCI Level I Complies with Canadian EMC Class A requirements Complies with Australia New Zealand EMC Class A requirements Immunity SeetheDeclarationofConformityfordetailsattheendofAppendix G Safety and Regulatory Statements in this guide Safety IEC950 EN60950 CSA950 NOM 019 SCFI 1993 UL1950 MUCHO BK CB FM5 Page 2 Thursday June 26 1997 11 37 AM ...

Page 61: ...ries ULTRA Smartmodem 14400 US Robotics Courier V FC V 34 Megahertz XJ2288 PCMCIA card modem At the hub end Issue the following AT command A0101 AT FQ2 C2 D3S0 1 W0 if C2 gives error use C0 Next Rev AT FQ2 C1 D3S0 1 W0 At the user end Issue the following AT command AT FW1 C1 W At the hub end Issue the following AT command A0101 AT F C0S0 1 W0 Next Rev AT F C1S0 1 W0 At the user end Issue the follo...

Page 62: ... end Issue the following AT command AT F0 W0 At the hub end Set the A B switch to A Issue the following AT command AT F0 R1 W0 At the user end Set the A B switch to A Issue the following AT command AT F0 W0 At the hub end Issue the following AT command A0101 AT F0 C0S0 1Q2 D3 K3 W0 Next Rev AT F0 C1S0 1Q2 D3 K3 W0 At the user end Issue the following AT command AT F0 W0 MUCHO BK CC FM5 Page 2 Thurs...

Page 63: ...tandard and have standard SNMP MIB browser function ality The communication between the SNMP network management station and the hub takes place using the network layer protocols IPX for Novell networks or IP for TCP IP networks Which protocol you use depends on the protocol being used by the network management station Additionally if the network management station is on the other side of a router ...

Page 64: ...ddressing Notes Because the IPX address is assigned automatically no IPX configuration is necessary therefore no IPX configuration is provided on the hub console interface By default the hub is ready to be managed by an SNMP network management station that is configured for IPX communications IP Addresses for IP and Non IPNetworks If you have chosen to manage your hub with an SNMP IP network manag...

Page 65: ...ault value is automatically generated and depends on the class of IP address that you entered See your network administrator for the subnet mask address All devices on your IP network must use the same subnet mask address Default Router The routingIPaddressofthenearestrouterinyournetwork The default is 0 0 0 0 If no routers are in your network enter the IP address of this device Country Phone Numb...

Page 66: ...t mask for the subnet on which the hub is installed the default router If you have configured the hub s IP parameters on a BOOTP server you do not need to use the IPConfig command in the ASCII console As shipped from the factory the hub is configured to use BOOTP to retrieve the IP configura tion information The BOOTP Process When the hub is powered on it broadcasts BOOTP requests that contain the...

Page 67: ...can only contain letters numbers periods or hyphens hphub16M is a user defined symbolic name to help you find the correct section of the bootptab file If you have multiple hubs that will be using BOOTP to get their IP configuration you should use a unique symbolic name for each hub ht is the hardware type tag For the HP 10Base T hubs set this to ether for Ethernet This tag must precede the ha tag ...

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Page 69: ...on which the redundant link is configured hub A in the illustration the Monitoring Hub is responsible for monitoring the link It sends IEEE 802 2 Test packets to the hub at the other end of the link hub B in the illustration the Remote Hub and looks for response packets from that hub If the response packets fail to come back the primary link is considered as having failed and the backup link which...

Page 70: ...ssions on the monitoring hubs For all the backup links in which the remote hub is involved the time configured on the moni toring hubs for those links should be increased by one second for each additional backup link beyond two links Add one to this count if the remote hub is also functioning as a primary monitoring hub in a different link Additional Notes Any port on the hub can be used for eithe...

Page 71: ...Backup Function Works The hub on which the redundant link is configured is responsible for moni toring the link It sends packets to the station at the other end of the link and looks for response packets from that station If the response packets fail to come back the primary link is considered as having failed and the backup link which had not been carrying any traffic is enabled automatically If ...

Page 72: ...om a monitoring hub If the remote device has more than 2 backup links functioning it may not be able to respond to the test packets fast enough when there is a high level of data traffic on the network segments This ability to respond may be improved by increasing the time between test packet transmissions on the monitoring hubs For all the backup links in which the remote device is involved the t...

Page 73: ...k Configuration Installation Sequence If a hub is installed in a network that includes two connections to another hub and the backup link has not yet been configured a loop in the network now existsthatwillcausesomenetworkperformancedegradation Forthisreason it is better to configure the backup link on the hub before the hub is installed in the network It is best to follow these steps 1 Attach a P...

Page 74: ...t is identified by pri the backup port by bkup Indications of Backup Link Activation When the primary link fails n consecutive test packet responses were not received on the primary port from the other device the backup link is automatically enabled Theeffectofthischangeisdisplayedonthemonitoring hub s LEDs and management interface Activation of the backup link does not change the status of any of...

Page 75: ...SCII console select Port Segment Configuration then Disable and enable ports option then enable ports From CiscoView re enable the primary port See the network manage ment product documentation for details on how to enable a port Power cycle the hub When the primary portis re enabled the backup portis automatically disabled and returned to backup mode MUCHO BK CE FM5 Page 7 Thursday June 26 1997 1...

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Page 77: ...data from the end user to the hub Eavesdrop Prevention for outbound data from the hub to the end user Both of these types of security can be configured on each port individually all twisted pair ports and the AUI port through the SEcure command on the ASCII console interface These per port security features are enabled by comparing the source and destination address of each packet received or tran...

Page 78: ... on a port the hub compares the port s authorized MAC address with the destination address of any outbound packet If the addresses match the hub concludes that the packet is destined for the computer attached to the port and it sends the packet out through the port unaltered However if the addresses do not match the hub prevents the computer from seeing the packet s contents by substituting a mean...

Page 79: ...vice It learns the device s address from the source address field in the packet First Heard Method The first heard method automatically assigns the first address detected on the portas the authorized MAC address This method is useful to quickly identify and authorize end users whose ports may require both Eavesdrop Prevention and Intruder Prevention Under this method the port will be disabled auto...

Page 80: ...e and a send alarm security violation notification feature These features are described on the next page In the above illustration the authorized end user is represented by PC 101 and the intruder is represented by PC 202 Intruder For illustration purposes the numbers101 and202 are usedtorepresent12 digit hexadecimal MAC addresses The HP hub compares the authorized MAC address 101 to the source ad...

Page 81: ...s and the source address do not match the HP hub will automatically disable the port Once a port is disabled because of a security violation to resume operation the port must be re enabled either by using the hub console interface s Port command or from the network management station A bit error in the source address field of the packet will not cause the port to be disabled In this case the hub d...

Page 82: ...ics The illustration on the next page shows the use of outbound data security using Eavesdrop Prevention This type of data security should be enabled on any port that is to receive data on a need to know basis The port must have an authorized MAC address configured and must be connected to only one end user Eavesdrop Prevention may not be used on cascaded ports or ports connected to a network with...

Page 83: ...F 7 Security Information Setting Outbound Security with Eavesdrop Prevention Security Information MUCHO BK CF FM5 Page 7 Thursday June 26 1997 11 37 AM ...

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Page 85: ...uped 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 11 2inches ofspaceforthepowercord IfyouareusingaRedundant Power Supply allow the appropriate amount of space for the RPS connector Ensure that the HP Hub 16M does not overload the power circuits wiring and over current protection To determine the poss...

Page 86: ...nt temperature might exceed 45 C 113 F Make sure the air flow around the sides of the hub is not restricted Power Precautions Follow these precautions when unplugging and plugging in power to the hub as well as adding or removing modules No te The hub does not have a power switch it is powered on when the power cord is plugged in The hub s power supply automatically adjusts to any AC power source ...

Page 87: ...volt ages such aslightning or disturbancesin the electrical utilities power grid Handle exposed metal componentsofthe 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 the power cord is plugged i...

Page 88: ...oires dangereuses telles que la foudre ou des perturba tions dans le réseau d alimentation public Manipulez les composants 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 de commutateur pr...

Page 89: ... 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 Symbol für Dokumentationsverw...

Page 90: ...casionalmente andare soggetti a pericolose tensioni transitorie ad esempio provocate da lampi o disturbi nella griglia d alimen tazione 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 esclusi vamente da person...

Page 91: ...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 realizarlos sola me...

Page 92: ...G 8 Safety and Regulatory Statements Safety Information Japanese Safety and Regulatory Statements Safety Information Japanese MUCHO BK CG FM5 Page 8 Thursday June 26 1997 11 37 AM ...

Page 93: ... used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area may cause harmful interference in which case the user will be required to correct the interference at his own expense VCCI Class 1 For Japan Only European Community This equipment complies with ISO IEC Guide 22 and EN55022 Class A with unshielded ...

Page 94: ...onformity Thefollowing Declaration ofConformity forthe HPJ3188A Hub 16Mcomplies with ISO IEC Guide 22 and EN 45014 The declaration identifies the product the manufacturer s name and address and the specifications that are recog nized in the European community MUCHO BK CG FM5 Page 10 Thursday June 26 1997 11 37 AM ...

Page 95: ...1 5 cables network connections A 2 RS 232 console port A 1 twisted pair connector pin outs A 3 CDpstatus command 3 6 clearing a password 2 5 Collision LED 1 4 1 12 2 3 collision monitoring 3 13 collisions definition 3 6 command 3 9 commands BAckup 3 5 COunters 3 6 DIsconnect 3 7 HElp 3 4 3 6 3 11 IPconfig 3 7 PIng 3 12 POrt 3 13 REset 3 13 RObustness 3 13 SEcure 3 14 SPeed 3 19 STatus 3 19 TEstlin...

Page 96: ...ment Module cables for A 1 hub at a glance iii connecting to fiber optic backbone 1 11 description iii features iv mounting 1 5 reference 1 12 ThinLAN connections 1 9 troubleshooting 2 1 hub operation verifying 1 2 hub to hub network connections with the MDI switch 1 8 I IEEE 802 3 Type 10Base T standard iii included parts 1 2 installing the hub mounting procedures 1 5 network connections 1 7 veri...

Page 97: ...3 12 pin outs minimum cable A 5 POrt command 3 13 Port LED 1 13 Port LEDs 1 4 2 3 port LEDs twisted pair 1 13 ports connection procedures 1 8 power cord plugging into the hub 1 2 plugging into the wall 1 3 Power LED 1 4 1 12 2 3 power on 1 4 procedures configuring a backup link E 5 network connections to the hub 1 7 network port connections 1 8 R rack mounting 1 5 instructions for 1 5 recommended ...

Page 98: ...tors B 2 electrical B 1 electromagnetic B 2 environmental B 1 physical B 1 SPeed command 3 19 Starting a console session 3 1 STatus command 3 19 status LEDs description 1 12 Syntax conventions for console commands 3 4 T table mounting 1 6 Telnet session establishing 3 2 terminator for a thin LAN segment 1 10 TEstlink command 3 21 ThinLAN Connection 1 9 ThinLAN connections 1 9 ThinLAN port and 50 o...

Page 99: ...MUCHO BK cvrb r1 ft5 Page 5 Thursday June 26 1997 11 37 AM ...

Page 100: ...n in this document is subject to change without notice Copyright 1997 Hewlett Packard Company Printed in Singapore 6 97 Manual Part Number J3188 90001 J3188 90001 MUCHO BK cvrb r1 ft5 Page 6 Thursday June 26 1997 11 37 AM ...

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HP J3188A, Installation And Reference Manual

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