Ipconfig command to be worked in Command prompt go to start>Run type cmd Command Prompt appears . These are the commands associated with Ipconfig.

syntax

IPCONFIG - Shows Information of Ethernet adapter Local Area Connection and PPP adapter
IPCONFIG /all Display full configuration information.
IPCONFIG /release [adapter] Release the IP address for the specified adapter.
IPCONFIG /renew [adapter] Renew the IP address for the specified adapter.
IPCONFIG /flushdns Purge the DNS Resolver cache.
IPCONFIG /registerdns Refresh all DHCP leases and re-register DNS names.
IPCONFIG /displaydns Display the contents of the DNS Resolver Cache.
IPCONFIG /showclassid adapter Display all the DHCP class IDs allowed for adapter. IPCONFIG /setclassid adapter[classid] Modify the dhcp class id.

Examples

ipconfig /setclassid "Local Area Connection" TEST  - set the DHCP class ID for the                                                    named adapter to = TEST

ipconfig                   Show information.ipconfig /all              Show detailed informationipconfig /renew            renew all adaptersipconfig /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"