Data type Range Default value
REG_DWORD 0 | 1 1


Determines whether the IP autoconfiguration feature is enabled for this interface.

Autoconfiguration allows TCP/IP to configure an interface even when it cannot locate a DHCP server. If an attempt to locate a DCHP server fails, TCP/IP configures the interface by using IP addresses from the Microsoft reserved Class B network (, subnet mask During autoconfiguration, TCP/IP continues its attempts to locate a DHCP server and abandons the autoconfiguration process if one is located.

IPAutoconfigurationEnabled also appears in the Tcpip\Parameters subkey and its value applies, by default, to all interfaces. However, if this entry appears in any Interfaces subkey, its value overrides the value in the Tcpip\Parameters subkey when configuring the interface.

Caution Image Caution

Do not change the value of this entry. If you do, the IP address assigned to the interface might not be reliable.