HP Embedded Firewall manual Troubleshooting Hubs, RJ-45 Cabling Pinouts Copper NIC Only

Page 63

RJ-45 Cabling Pinouts (Copper NIC Only)

Troubleshooting Hubs

A crossover cable can be used to identify the type of failure when hub performance or connectivity is in question.

To use a crossover cable:

1Connect a file server and a client PC back-to-back with a crossover cable to verify that the NIC and network operating system are properly configured.

2To make a crossover cable, connect TD+ to RD+ and TD– to RD–.

The cable performs the crossover that is usually performed by the hub.

RJ-45 Cabling Pinouts (Copper NIC Only)

The following illustration compares the cabling pinouts for straight-through and crossover cables on the 3CR990B-97 NIC.

If the file server and client PC function together as a small network, then either the existing cabling or the hub is failing.

When a crossover cable is used, the LED on the NIC functions differently than it would under normal operating conditions. For example, with a correct crossover connection, the LED lights, whereas with a straight-through connection, the LED does not light. If you make a crossover cable and the polarity is mismatched (that is, TD+ to RD– instead of TD+ to RD+), the LED blinks.

57

Image 63
Contents 10/100 Secure Network Interface Card User GuideUnited States Government Legend Contents Installing and Configuring Data Encryption Offloads Configuring the NIC Running NIC Diagnostics Installing and Connecting the NIC Minimum Installation RequirementsInstallation Overview Safety Precautions Preparing the NIC and the ComputerNetwork Environment Cable Required Maximum Cable Length Installing and Connecting the NIC 3CR990B-97 NIC Double click Network Connections Installing the Network DriverVerifying the Network Driver Installation Install without Diagnostic Program-installs the driver onlyWindows 2003 Server Driver Installation Windows XP Driver Installation Windows XP Driver Installation Windows 2000 Driver Installation Windows 2000 Driver Installation Click Have Disk Windows NT 4.0 Driver InstallationVerifying the Network Driver Installation Windows 98 SE Driver Installation Windows 98 SE Driver Installation Novell NetWare Driver Installation Installing the Driver in Novell NetWare Server 5.1Installation During Novell OS Installation Select Save parameters and load driver Installation with Novell Already InstalledIdentifying the Slot Number Choose Select a driverLoad ODINEB.NLM Verifying or Modifying NIC ParametersRemoving Drivers from Autoexec.ncf Installing the Driver in Novell NetWare Server Page Cd /tmp/3c990/3c990 make Linux 2.4 Driver InstallationLinux 2.4 Driver Installation Overview Offloading Encryption ProcessingSelecting Basic or Strong Encryption Processing Configuring IPSec in Windows 2003, Windows XP, and Windows Creating a Security PolicyEncryption Type Level Description Select IP Security Policy Management, and then click Add Clear the Activate the default response rule check boxDefining the Console Creating the PolicyCreating a Filter Binding the FilterCreating the Filter Action Select Un-assign Binding the Filter ActionEnabling Encryption Disabling EncryptionInstalling and Configuring Data Encryption Offloads Installing 3Com Advanced Server Features for Windows About the Advanced Server Features3Com DynamicAccess Advanced Server Features Failover Load BalancingVLANs Server Features Using Other NICsVerifying the Installation Installing 3Com Advanced Server SoftwarePlanning the Configuration Configuring Groups and VLANsNumber of VLANs Working With Server FeaturesCreating a Group Windows 2003, Windows XP, and WindowsWindows NT Specifying a Dedicated IP Address Adding NICs to a GroupSpecifying Traffic Priorities Click ConfigureCreating a Vlan Changing an IP AddressRemoving a NIC from a Group Saving the ConfigurationDisabling Load Balancing for a Group Changing the Primary NICDisplaying Group Properties Troubleshooting a Load Balancing ConfigurationSymptomTip Displaying NIC PropertiesDouble-clickNetwork Adapters Enabling Offloads Value Offload Function EnablesConfiguring Offloads for a Group of Different NICs Disabled Configuring the NICDefault NIC Settings Option Description SettingsAll Configuring the NICMethod Description Requirements Configuration MethodsInstalling the 3Com NIC Diagnostics Program Changing General NIC Configuration SettingsUsing the 3Com NIC Diagnostics Program Starting the 3Com NIC Diagnostics ProgramUsing the 3Com DOS Configuration Program BBS BIOS-Compatible PCs Configuring the Managed PC Boot Agent MBAEnabling or Disabling the Boot ROM Setting Booting From the NetworkDisabling the 3Com Logo Non-BBS BIOS-Compatible PCsState Meaning Troubleshooting the NICInterpreting the NIC LEDs 3CR990B-97 NICViewing the NIC LEDs in the Diagnostics Program Troubleshooting Problems with the LEDs3CR990B-FX-97 NIC Accessing Release Notes and Frequently Asked Questions Accessing 3Com Support DatabasesAccessing the 3Com Knowledgebase Accessing the 3Com NIC Help SystemTroubleshooting the NIC Installation Problems or Error MessagesCleaning Up a Failed Installation Tip Description Troubleshooting the Network ConnectionTroubleshooting a Network Connection Troubleshooting Remote Wake-UpRJ-45 Cabling Pinouts Copper NIC Only Troubleshooting HubsRemoving the Network Driver Windows 2003, Windows XP, and WindowsWindows NT Windows 98 SE Removing 3Com DynamicAccess Advanced Server Features From the Start menu, select Settings/Control PanelNetWare Running the 3Com DOS Diagnostics Program Running NIC DiagnosticsTab Description Running the NIC Diagnostics TestsRunning the Network Test Running the NIC TestClick Perform NIC Test Viewing the NIC LEDs in the 3Com Diagnostics Program Using the 3Com Icon in the Windows System TrayViewing Network Statistics Removing the 3Com NIC Diagnostics Program Enabling the IconDisplaying Network Statistics Running NIC Diagnostics Standards Conformance 3CR990B-97 NIC SpecificationsHardware Network Interface3CR990B-FX-97 NIC Specifications Cabling Requirements RJ-45 Connector Pin Assignments About the 3Com DMI Agent Installing the 3Com DMI AgentNetwork Management Requirements Installing the 3Com DMI AgentClick NIC Software Click Install 3Com DMI Agent Now System RequirementsPage Installing the 3Com DMI Agent Obtaining Support for your Product Contact Us Telephone Technical Support and RepairCountry Telephone Number Asia, Pacific Rim Country Telephone Number Europe, Middle East, and AfricaLatin America North America Telephone Support and Repair 1 CountryInterference Handbook FCC Class B StatementFCC Declaration of Conformity MIC Class B Compliance Korea Safety Compliance Statement