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APIPA (Automatic Private IP Addressing).

Under Windows, the IP address is usually configured by default. The device APIPA automatically assigns an address between 169.245.0.1 and 169.254.255.254 if the computer fails to connect on a DHCP server (or alternate address in the Control Panel).

If the computer can subsequently connect to a DHCP server, it resumes a normal IP address (from Windows 2000). You can also request to "repair connection" in XP or 2003 server and following

This address range is 169.254.XX particular, it is private. It can communicate with equipment in the same address range and never on the Internet (routing not possible). It is also possible to configure the computer with a DNS server, gateway address default or a WINS server (connected to NetBios).

APIPA is available on Win98 operating systems, Windows Millennium, 2000 Win XP, VISTA, Seven and 2003- 2008

To disable this function, you can assign a fixed IP address or edit the registry.

In the case of a single adapter (Win 2003):

  • Add entry IPAutoconfigurationEnabled with a REG_DWORD value to 0 under HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip \ paremeters \ Interfaces \ interface and restart the computer.

To disable all adapters (Win 2003):

  • Attach the entry IPAutoconfigurationEnabled with a REG_DWORD value to 0 under HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip \ paremeters and restart the network server.

Definitions associated: Ethernet network

Dernière mise à jour, le 20/08/2010
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