HP J3188A manual DIsconnect, When to Use IPconfig

Page 37

Managing the Hub

Console Command Reference

DIsconnect

To terminate the console session and reset the console port baud rate to be automatically sensed. The command also disconnects the phone link if you accessed the console using modems.

IPconfig

 

To set IP (Internet Protocol) configuration parameters on the hub.

 

By default, the hub is configured to use BOOTP (Internet Boot Protocol) to

 

automatically retrieve the IP parameters from a BOOTP server, and to enable

 

Telnet access to the hub’s console interface. Use this command if you want

 

to manually configure the IP address or disable Telnet.

 

The IP configuration must be carefully controlled. If each device’s IP address

 

is not unique on the network, severe network performance problems will

 

occur. A network administrator should maintain responsibility for the IP

 

settings. See Appendix D, “Network Addressing,” for information on setting

 

the IP configuration.

 

 

N o t e

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 process completes, press

 

[Enter] several times for the prompt.

 

When to Use IPconfig

 

 

If any of the following is true, the hub’s IP parameters must be configured,

 

either on a BOOTP server or on the hub through the console interface:

 

The hub will be managed remotely with a network management product,

 

such as CiscoWorks over an IP network (a network that uses IP commu-

 

nications, for example TCP/IP).

 

The network cable segments attached to the hub will be tested using the

 

IP “Ping” test.

 

Telnet access to the hub is desired.

Managing the Hub

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Contents HP J3188A Page HP 10Base-T Hub-16M J3188A Installation and Reference GuidePublication Number Front of the Hub HP 10Base-T Hub-16M J3188ABack of the Hub IiiNetwork Connections FeaturesContents Cables and Connectors Vii Security InformationPage Installing the Hub Verify included parts Installing and Configuring Your HubConnect the external transceiver Verify the hub operates correctlyTime Cord connected directly to the hub for proper operationPattern LEDRack or Cabinet Mounting Mount the hubTable Mounting Connect the hub to your network Connecting Hubs Together Connecting Devices to the HubTwisted-Pair Cascade Connections ThinLAN Connections InstallingOhm terminator Interpreting LED Status Connecting the Hub-16M to a Fiber-Optic BackboneInterpreting Hub Status LEDs Following table provides LED port information Interpreting Port Status LEDsPage Troubleshooting Approaches TroubleshootingTroubleshooting Using a Checklist to Diagnose the Hub Using a Checklist to Diagnose the HubProblem Solution LED Operation Diagnostic Tips Troubleshooting LED OperationPower Coll Hub will automatically recover afterTesting the Hub Only Hub Maintenance TasksClearing a Password for the Ascii Console Running Connectivity Tests Troubleshooting Hub Maintenance TasksObtaining Firmware Enhancements Managing the Hub Setting up the Ascii ConsoleRemotely, Using Telnet Directly, Using a Serial Cable and a TerminalManaging the Hub Starting the Console Remotely, Using a Modem and a Terminal Commands are described in the rest of the chapter Console Command Reference Example HE ST This displays help for the Status command Syntax Conventions on Help ScreenDefault Description BAckupCOunters CDpstatusCounter Name Definition Valid Range RangeWhen to Use IPconfig IPconfigDIsconnect Using Novell NetWare IPX Configuring for Network ManagementUsing IP Following table explains the IP parametersMAnagers SHow Parameter Default Value DefinitionManager Address IP or IPX Receive Alarms? CommandTo end your editing MEssageinterval Displays the other devices that are using CDP protocolNEighbor Table entry with ID 1 would now be a blank lineClear a password PAsswordPIng Community namePOrt port ON/OFF REsetRObustness SEcure portSHowCLear Security Configuration Parameter DefinitionsManaging the Hub Configuring Security on All Twisted-Pair Ports Configuring Security on a Single PortEavesdrop Prevention, must be set to on Address Selection Authorized Clearing Security Violation Indicators Showing the Security ConfigurationSTatus SPeed new speedStatus Information What It Means TEstlink Network links, see the , Troubleshooting16M will respond with the correct packet To sendPage Recommended Cables Cables and ConnectorsFollowing table shows PC connections to the RS-232 port Following table shows network connections to the hub Cables and ConnectorsCable Function Cable Type HP Product Number Pins 1 and 2 must be a twisted pair Twisted-Pair Cable/Connector Pin-OutsPins 3 and 6 must be a twisted pair Twisted-Pair Cable for Hub-to-Computer Network ConnectionInstaller for assistance with your cabling requirements RS-232 Connector and Cable Pin-OutsCable pin-out described below Minimum pin-out will function correctlyMinimum Cable Pinout for Ascii Console Connection SignalRS-232 Modem Cable Twisted-Pair Straight-Through Cable Twisted-Pair Cable Pin AssignmentsHub End MDI-X Physical SpecificationsElectrical EnvironmentalSpecifications ConnectorsElectromagnetic US Robotics Courier V.FC/V.34 Modem ConfigurationMegahertz XJ2288 Pcmcia card modem Intel 14.4EX Practical Peripherals PM288MT IISupra FAX Communication Between the Hub Network Management Station Network AddressingIP Addresses for IP and Non-IP Networks IPX Addressing for Novell NetWareIPX Addressing Notes Globally Assigned IP Network AddressesCountry Device IP ConfigurationCompany Name/Address Bootp Process Using BootpDefinitions of the table entry fields Bootp Table File EntriesPage How Backup Links Work Backup LinksLimitations Backup LinksAdditional Notes How the Backup Function Works Examples of Backup LinksHub to a Switch Hub to a ServerHub can monitor only one link T e G g e s t i o nConfiguration/Installation Sequence Configuring a Backup LinkIndications of Backup Link Activation Identifying the Backup LinkReactivating the Primary Link Page Understanding Network Security Security InformationHow Eavesdrop Prevention Works How Intruder Prevention WorksAuthorized MAC address Security InformationAssigning the Authorized MAC address Setting Inbound Security with Intruder Prevention Send Alarm Auto Port DisableSetting Outbound Security with Eavesdrop Prevention Security Information Page Mounting Precautions Safety and Regulatory StatementsTemperature might exceed 45C 113F Power PrecautionsSettings to configure Equipment and should be easily accessibleGrounding Safety InformationTible de causer des dommages à léquipement Informations concernant la sécuritéHinweise zur Sicherheit Considerazioni sulla sicurezza Consideraciones sobre seguridad Safety Information Japanese FCC Class a Statement for U.S.A. Only Regulatory StatementsEuropean Community CanadaDeclaration of Conformity Index IndexDiagnosing with the LEDs … 2-2 diagnostic tests Late collision … 3-13 mounting the hub … LED description … Verifying hub operation … Page J3188-90001