Interpreting LED Status | HP J3188A instruction

Installing the Hub

Interpreting LED Status

Connecting the Hub-16M to a Fiber-Optic Backbone

With an HP Fiber-Optic external transceiver for 10Base-FL networks, you can connect your hub to a fiber-optic backbone. The following illustration shows a hub with an HP Fiber-Optic external transceiver connected to a fiber-optic backbone:

Fiber-optic cable to a fiber-optic backbone

HP J2606A Fiber-Optic

For more information about cabling 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 port.

Status information for both are described in the following tables.

Installing the Hub

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HP J3188A manual Interpreting LED Status, Connecting the Hub-16M to a Fiber-Optic Backbone

Contents

HP J3188A Page HP 10Base-T Hub-16M J3188A Installation and Reference Guide Publication Number Front of the Hub HP 10Base-T Hub-16M J3188ABack of the Hub Iii Network Connections Features Contents Cables and Connectors Vii Security InformationPage Installing the Hub Verify included parts Installing and Configuring Your HubConnect the external transceiver Verify the hub operates correctly Time Cord connected directly to the hub for proper operation Pattern LED Rack or Cabinet Mounting Mount the hub Table Mounting Connect the hub to your network Connecting Devices to the Hub Connecting Hubs TogetherTwisted-Pair Cascade Connections ThinLAN Connections Installing Ohm terminator Interpreting LED Status Connecting the Hub-16M to a Fiber-Optic Backbone Interpreting Hub Status LEDs Following table provides LED port information Interpreting Port Status LEDsPage Troubleshooting Approaches Troubleshooting Using a Checklist to Diagnose the Hub Troubleshooting Using a Checklist to Diagnose the HubProblem Solution LED Operation Diagnostic Tips Troubleshooting LED OperationPower Coll Hub will automatically recover after Hub Maintenance Tasks Testing the Hub OnlyClearing a Password for the Ascii Console Troubleshooting Hub Maintenance Tasks Running Connectivity TestsObtaining Firmware Enhancements Managing the Hub Setting up the Ascii Console Directly, Using a Serial Cable and a Terminal Remotely, Using TelnetManaging the Hub Starting the Console Remotely, Using a Modem and a Terminal Commands are described in the rest of the chapter Console Command ReferenceExample HE ST This displays help for the Status command Syntax Conventions on Help Screen Default Description BAckup COunters CDpstatusCounter Name Definition Valid Range Range IPconfig When to Use IPconfigDIsconnect Using Novell NetWare IPX Configuring for Network ManagementUsing IP Following table explains the IP parameters MAnagers SHow Parameter Default Value Definition Command Manager Address IP or IPX Receive Alarms?To end your editing MEssageinterval Displays the other devices that are using CDP protocolNEighbor Table entry with ID 1 would now be a blank line Clear a password PAsswordPIng Community name REset POrt port ON/OFFRObustness SEcure portSHowCLear Security Configuration Parameter Definitions Managing the Hub Configuring Security on a Single Port Configuring Security on All Twisted-Pair PortsEavesdrop Prevention, must be set to on Address Selection Authorized Clearing Security Violation Indicators Showing the Security Configuration STatus SPeed new speed Status Information What It Means TEstlink Network links, see the , Troubleshooting16M will respond with the correct packet To sendPage Cables and Connectors Recommended CablesFollowing table shows PC connections to the RS-232 port Cables and Connectors Following table shows network connections to the hubCable 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 Connection Installer for assistance with your cabling requirements RS-232 Connector and Cable Pin-OutsCable pin-out described below Minimum pin-out will function correctly Signal Minimum Cable Pinout for Ascii Console ConnectionRS-232 Modem Cable Twisted-Pair Cable Pin Assignments Twisted-Pair Straight-Through CableHub End MDI-X Physical SpecificationsElectrical Environmental Connectors SpecificationsElectromagnetic Modem Configuration US Robotics Courier V.FC/V.34Megahertz XJ2288 Pcmcia card modem Practical Peripherals PM288MT II Intel 14.4EXSupra FAX Communication Between the Hub Network Management Station Network Addressing IP Addresses for IP and Non-IP Networks IPX Addressing for Novell NetWareIPX Addressing Notes Globally Assigned IP Network Addresses Device IP Configuration CountryCompany Name/Address Bootp Process Using Bootp Definitions of the table entry fields Bootp Table File EntriesPage How Backup Links Work Backup Links Backup Links LimitationsAdditional Notes How the Backup Function Works Examples of Backup LinksHub to a Switch Hub to a Server Hub can monitor only one link T e G g e s t i o n Configuration/Installation Sequence Configuring a Backup Link Indications of Backup Link Activation Identifying the Backup Link Reactivating the Primary Link Page Understanding Network Security Security Information How Eavesdrop Prevention Works How Intruder Prevention WorksAuthorized MAC address Security Information Assigning the Authorized MAC address Setting Inbound Security with Intruder Prevention Send Alarm Auto Port Disable Setting Outbound Security with Eavesdrop Prevention Security Information Page Mounting Precautions Safety and Regulatory Statements Temperature might exceed 45C 113F Power PrecautionsSettings to configure Equipment and should be easily accessible Grounding Safety Information Tible de causer des dommages à léquipement Informations concernant la sécurité Hinweise zur Sicherheit Considerazioni sulla sicurezza Consideraciones sobre seguridad Safety Information Japanese FCC Class a Statement for U.S.A. Only Regulatory StatementsEuropean Community Canada Declaration of Conformity Index Index Diagnosing with the LEDs … 2-2 diagnostic tests Late collision … 3-13 mounting the hub … LED description … Verifying hub operation … Page J3188-90001