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TCP/IP Configuration Utilities (ipconfig, winipcfg and ifconfig)
(Page 3 of 5)
The ipconfig Utility
Windows takes a somewhat different
approach to network configuration than UNIX. As we have seen, the UNIX
ifconfig program can be used both to view and modify a wide range
of configuration parameters. In Windows, however, most setup and parameter
modification is done using the Windows Control Panel. Windows does include
a utility that is somewhat similar to UNIXs ifconfig, but
it has far less functionality, and is used mainly to inspect the existing
configuration, not change it. It also allows an administrator to easily
perform a few simple functions on a host.
ipconfig Options and Parameters
On most newer versions of Windows,
the equivalent of ifconfig is a command-line utility called ipconfig.
Like ifconfig, the Windows utility is controlled using options
that are supplied to the program. However, because it is so much simpler
than ifconfig, there are only a few different options that can
be used. These are summarized in Table 308.
Table 308: Typical Windows ipconfig Options and Parameters
Option
/ Parameters
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Description
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(none)
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When called with no options or
parameters, ipconfig displays the IP address, subnet mask and default
gateway for each interface on the host.
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/all
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Similar to
calling ipconfig with no options, but displays more detailed
configuration information about the hosts interfaces.
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/release [<adapter>]
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Releases
(terminates) the DHCP lease on either
the specified adapter (interface), or all interfaces if none is provided.
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/renew
[<adapter>]
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Manually renews
the DHCP lease for either the specified
adapter (interface), or all adapters if none is mentioned.
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/displaydns
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Displays the contents of the
hosts DNS
resolver cache.
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/flushdns
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Clears the
hosts DNS resolver cache.
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/registerdns
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Refreshes (renews) all DHCP leases
and also re-registers any DNS names associated with the host.
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/showclassid
<adapter>
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Displays DHCP
class IDs associated with this adapter (these are used to arrange clients
into groups that are given different treatment by DHCP servers.) The
adapter must be specified, even if there is only one.
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/setclassid <adapter>
[<classid>]
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Modifies the DHCP class ID for
the specified adapter.
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As mentioned earlier, ipconfig
is most often used to just examine the existing configuration. When
simplified information is needed it is called with no options; an example
of the output from this use of the command is shown in Table 309.
For detailed information on interfaces, the /all option
is used; an example is in Table 310
(slightly modified so it is easier to read).
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Version 3.0 - Version Date: September 20, 2005
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