MS-DOS Commands :: ipconfig

Overview:

Displays internet configuration, including IP address.

Tip: To display your IP address, simply type: ipconfig

Note: If you are using a router to connect to the internet, this command displays your local IP address. It does not display the IP address that the outside world sees. Instead, use getip or visit WhatIsMyIP.com or checkip.dyndns.org.

Command Options:

There are a few options you can use with the ipconfig command. For the complet list of options, type ipconfig /?

The following examples demonstrate some of the more useful options:

ipconfig
ipconfig  /all

Displays information about all the network adapters. Add flag /all to display detailed information; otherwise, displays only the IP address, subnet mask and default gateway for each adapter bound to TCP/IP.

ipconfig  /flushdns

Used to clear dns, that is, flush the local DNS resolver cache.

ipconfig  /renew

Renews the IP address for all network adapters.

ipconfig /?


USAGE:

    ipconfig [/? | /all | /renew [adapter] | /release [adapter] |

              /flushdns | /displaydns | /registerdns |

              /showclassid adapter |

              /setclassid adapter [classid] ]



where

    adapter         Connection name 

                   (wildcard characters * and ? allowed, see examples)



    Options:

       /?           Display this help message

       /all         Display full configuration information.

       /release     Release the IP address for the specified adapter.

       /renew       Renew the IP address for the specified adapter.

       /flushdns    Purges the DNS Resolver cache.

       /registerdns Refreshes all DHCP leases and re-registers DNS names

       /displaydns  Display the contents of the DNS Resolver Cache.

       /showclassid Displays all the dhcp class IDs allowed for adapter.

       /setclassid  Modifies the dhcp class id.  



The default is to display only the IP address, subnet mask and

default gateway for each adapter bound to TCP/IP.



For Release and Renew, if no adapter name is specified, then the IP address

leases for all adapters bound to TCP/IP will be released or renewed.



For Setclassid, if no ClassId is specified, then the ClassId is removed.



Examples:

    > ipconfig                   ... Show information.

    > ipconfig /all              ... Show detailed information

    > ipconfig /renew            ... renew all adapters

    > ipconfig /renew EL*        ... renew any connection that has its 

                                     name starting with EL

    > ipconfig /release *Con*    ... release all matching connections,

                                     eg. "Local Area Connection 1" or

                                         "Local Area Connection 2"

(Enlarge: ipconfig /?)