Parameters
IPCONFIG
/all : Displays the full TCP/IP configuration for all adapters. Without this parameter, ipconfig displays only the IP address, subnet mask, and default gateway values for each adapter. Adapters can represent physical interfaces, such as installed network adapters, or logical interfaces, such as dial-up connections.
/renew [Adapter] :
Renews DHCP configuration for all adapters (if an adapter is not
specified) or for a specific adapter if the Adapter parameter is
included. This parameter is available only on computers with
adapters that are configured to obtain an IP address automatically.
To specify an adapter name, type the adapter name that appears when
you use ipconfig without parameters.
/release [Adapter]
: Sends a DHCPRELEASE message to the DHCP server to release
the current DHCP configuration and discard the IP address
configuration for either all adapters (if an adapter is not
specified) or for a specific adapter if the Adapter parameter is
included. This parameter disables TCP/IP for adapters configured to
obtain an IP address automatically. To specify an adapter name, type
the adapter name that appears when you use ipconfig without
parameters.
/flushdns :
Flushes and resets the contents of the DNS client resolver cache.
During DNS troubleshooting, you can use this procedure to discard
negative cache entries from the cache, as well as any other entries
that have been added dynamically.
/displaydns :
Displays the contents of the DNS client resolver cache, which
includes both entries preloaded from the local Hosts file and any
recently obtained resource records for name queries resolved by the
computer. The DNS Client service uses this information to resolve
frequently queried names quickly, before querying its configured DNS
servers.
/registerdns :
Initiates manual dynamic registration for the DNS names and IP
addresses that are configured at a computer. You can use this
parameter to troubleshoot a failed DNS name registration or resolve
a dynamic update problem between a client and the DNS server without
rebooting the client computer. The DNS settings in the advanced
properties of the TCP/IP protocol determine which names are
registered in DNS.
/showclassid Adapter :
Displays the DHCP class ID for a specified adapter. To see the DHCP
class ID for all adapters, use the asterisk (*) wildcard character
in place of Adapter. This parameter is available only on computers
with adapters that are configured to obtain an IP address
automatically.
/setclassid Adapter [ClassID]
: Configures the DHCP class ID for a specified adapter. To set the
DHCP class ID for all adapters, use the asterisk (*) wildcard
character in place of Adapter. This parameter is available only on
computers with adapters that are configured to obtain an IP address
automatically. If a DHCP class ID is not specified, the current
class ID is removed.
/?: Displays help
at the command prompt.
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