HP Embedded Firewall Series Manuel d'utilisateur télécharger pdf (Page 62)

12 Troubleshooting the NIC

Troubleshooting Remote Wake-Up

If your computer does not boot in response to a Remote Wake-Up event, perform these

troubleshooting steps:

1 Make sure that you are using the latest driver for the NIC.

This driver is shipped with the NIC on the 3Com Installation CD. It can also be

downloaded from the 3Com Software Library. Point your Web browser to the 3Com

home page:

http://www.3com.com/

Under Service and Support, click Software, Drivers, and INFs.

2 Check the computer BIOS.

• Boot the computer and enter the BIOS.

For instructions on entering the BIOS, refer to the computer documentation or

consult the computer vendor.

• Locate the Wake-Up on LAN event setting.

• Verify that the setting is enabled.

3 If the previous steps have failed, install a known functioning Remote Wake-Up NIC in

the computer.

• If Remote Wake-Up works with the new NIC installed, consult your computer

vendor for a replacement NIC.

• If Remote Wake-Up does not work with the new NIC installed, there may be a

problem with the computer motherboard. Consult your computer manufacturer.

Troubleshooting a Network Connection

When working with 10BASE-T or 100BASE-TX cabling, concentrators, and NICs from different

vendors, it is possible to connect everything but still have no network communication.

To narrow the range of possible causes of common network connection problems:

3CR990B-97 NIC

1 Determine whether your equipment complies with the 10BASE-T or 100BASE-TX

standard.

This is particularly important for data concentrators (hubs or repeaters).

2 Connect a straight-through cable from the computer to the hub.

The hub performs an internal crossover so that the signal can go from TD+ to RD+

and TD– to RD–. When you look at an RJ-45 connector from the front (that is, the

opposite side from where the wires enter the connector), pin 1 is identified on the

right side when the metal contacts are facing up.

3 Make sure that the TD+ and TD– wires are twisted together, and that the RD+ and

RD– are twisted together.

Using wires from opposing pairs can cause signals to be lost.

NOTE: Wake-On-Error is enabled by default.

NOTE: For additional network troubleshooting information, see “Running the NIC

Diagnostics Tests” on page 62.

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HP Embedded Firewall Series Manuel d'utilisateur Page 62