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The most common problems that occur on IP networks result from errors in
the addressing scheme. It is important to test your address configuration before
continuing with further configuration steps. Basic testing of a
network should proceed in sequence from one OSI reference model layer
to the next. Each test presented in this section focuses on network
operations at a specific layer of the OSI model. As shown in the
Figure, telnet, ping, trace, show
ip route, show
interfaces
and
debug
are commands that allow you to
test your network.
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