SYNTAX

ipconfig [/? | /all | /renew adapter | /release adapter | /flushdns | /displaydns | /registerdns | /showclassid adapter | /setclassid adapter classid

The adapter connection name can use wildcard characters (* and ?).

OPTIONS    /?             Displays this help message
   /all           Displays full configuration information
   /release       Releases the IP address for the specified adapter
   /renew         Renews the IP address for the specified adapter
   /flushdns      Purges the DNS Resolver cache
   /registerdns   Refreshes all DHCP leases and reregisters DNS names
   /displaydns    Displays the contents of the DNS Resolver Cache
   /showclassid   Displays all the DHCP ClassIds allowed for the specified adapter
   /setclassid    Modifies the DHCP ClassId

The default (with no parameters specified) is to display only the IP address, subnet mask, and default gateway for each adapter that is bound to TCP/IP.

For /all, Ipconfig displays all of the current TCP/IP configuration values, including the IP address, subnet mask, default gateway, and Windows Internet Naming Service (WINS) and DNS configuration.

For /release and /renew, if no adapter name is specified, the IP address leases for all adapters that are bound to TCP/IP are released or renewed.

For /setclassid, if no ClassId is specified, the ClassId is removed.

EXAMPLES    ipconfig                   Show information
   ipconfig /all              Show detailed information
   ipconfig /renew            Renew all adapters
   ipconfig /renew EL*        Renew any connection whose name starts EL
   ipconfig /release *Con*    Release all matching connections,
                              for example, "Local Area Connection 1" or "Local Area Connection2"

Note that the /Release and /Renew options can be used only if the system is configured with DHCP.