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"