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How to disable APIPA

Posted On 2007-07-11 by FortyPoundHead
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Tags: Networking Tutorial Windows
Views: 2622


A Windows-based computer that is configured to use DHCP can automatically assign itself an Internet Protocol (IP) address if a DHCP server is not available. For example, this could occur on a network without a DHCP server, or on a network if a DHCP server is temporarily down for maintenance.

Read more about APIPA on the What's APIPA? page.

You may want to disable it in any of the following cases:


  • Your network uses routers.

  • Your network is connected to the Internet without a NAT or proxy server.



To disable automatic address configuration do the following:

Windows 2000/XP/2003

  1. Open Registry Editor.

  2. In Registry Editor, navigate to the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
    Services\Tcpip\Parameters\Interfaces\adapter_name


  3. Create the following entry:
    IPAutoconfigurationEnabled: REG_DWORD

  4. Assign a value of 0 to disable Automatic Private IP Addressing (APIPA) support for the selected network adapter.

  5. Close Registry Editor.


Note: You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure.

If the IPAutoconfigurationEnabled entry is not present, a default value of 1 is assumed, which indicates that APIPA is used.

If multiple adapters are installed, you can disable APIPA for all installed adapters by setting the IPAutoconfigurationEnabled entry to 0 at the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters


Windows 98/ME

  1. Open Registry Editor.

  2. In Registry Editor, navigate to the following registry key:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\
    Services\VxD\DHCP


  3. Create the following entry:

  4. IPAutoconfigurationEnabled: REG_DWORD

  5. Assign a value of 0 to disable Automatic Private IP Addressing (APIPA) support for the selected network adapter.

  6. Close Registry Editor.




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FortyPoundHead has posted a total of 1974 articles.

 


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