Advanced Troubleshooting Procedures; Troubleshooting Physical Network Problems - SMC Networks D3CM1604V Administrator's Manual

Advanced Troubleshooting Procedures

Most advanced troubleshooting procedures fall into one of the following categories:
Physical - an underlying problem with cables, a bad EMTA, or similar hardware problem.
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See page 49.
Configuration - a problem with the configuration of one or more of network components.
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See page 50.
Software - a failure of one or more software applications, an undesired interaction
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between two or more applications, or an undesired application that has been introduced
into the network. See page 54.

Troubleshooting Physical Network Problems

When you experience network troubles, start by checking the physical network devices and
connections. These problems are the most easily fixed and include:
Performing a thorough physical inspection of your network.
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Checking that all hardware devices, including the EMTA, are plugged in and physically
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connected to the network.
Making sure you are using the proper network cables (for example, not using a
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crossover cable with a NIC that requires a straight-through cable).
Making sure all network cables are in good condition and well seated. Often, reseating
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the cable into a connector is all that is required to ensure a firm connection.
In addition, some operating systems, such as Microsoft Windows XP, show errors, such as
when a network cable is unplugged. Figure 2, for instance, shows examples of how
Microsoft Windows XP shows connection statuses in the Network Connections window. For
information about other operating systems, refer to the documentation for those operating
systems.
Troubleshooting Procedures
D3CM1604V EMTA Cable Modem Administrator Manual
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