The syntax for the use of the IPCONGIG program in Windows 2000 is:

ipconfig \[/? | /all | /release \[adapter\] | /renew \[adapter\] | /flushdns | /registerdns | /displaydns\]

where:

/?             Displays help.                              /all           Displays the 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 re-register DNS names.                              /displaydns    Displays the contents of the DNS resolver cache.
The DNS related switches are new for Windows 2000.