Troubleshooting Checklist; Checking Network Connectivity - 3Com 3C2000 User Manual

12 Troubleshooting
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Troubleshooting Checklist

WARNING: Before removing or inserting the NIC, please review all
precautions outlined under "Safety Precautions" on page 3.
The following checklist provides recommended actions to take to resolve problems
installing the NIC or running it in your system.
• Inspect all cables and connections. Verify that the cable connections at the NIC
and the switch are attached properly. Make sure that the cable length and rating
are compliant with the requirements listed in "Connecting the Network Cable" on
page 5.
• Check the NIC installation by reviewing Chapter 2, "Installing and Connecting the
NIC". Make sure that the NIC is properly seated in a PCI slot. Check for specific
hardware problems, such as obvious damage to board components or the PCI
edge connector.
• Check the configuration settings and change them if they are in conflict with
another device.
• Make sure that your system is using the latest BIOS.
• Try inserting the NIC in another PCI slot. If the new slot works, the original slot in
your system may be defective.
• Replace the failed NIC with one that is known to work properly. If the second NIC
works in the slot where the first one failed, the failed NIC is probably defective.
• Install the NIC in another functioning system and run the tests again. If the NIC
passes the tests in the new system, the original system may be defective.
• Remove all other NICs from the system and run the tests again. If the NIC passes
the tests, other NICs may be causing contention.

Checking Network Connectivity

Use the 3Com Connection Assistant included on the 3Com Installation CD to test for
network connectivity. For installation instructions, see Chapter 10, "Installing and
Using the 3Com Connection Assistant".
Checking Connectivity in Windows
If the 3Com Connection Assistant is not installed, use the PING command in Windows
to determine if the NIC has network connectivity.
1 Open the Windows Start menu and select Run.
• For Windows XP, Windows 2000, and Windows NT 4.0, type: cmd and then
click OK.
• For Windows Me, Windows 98SE, type: command, and then click OK.
2 Type ipconfig/all to display the command window.
3 Enter ping <IP address of default gateway> from the command line.
Network connectivity information is displayed.
Checking Connectivity in Linux
To verify that the NIC interface is up and running in Linux, run ifconfig.
To check statistics on the NIC, run netstat -i.
Refer to your Linux user guide for more information on ifconfig and netstat.