How To: Disable Automatic Private IP Addressing (APIPA) In Windows Vista
Automatic Private IP Addressing, or APIPA as it is better known, is a feature of Windows 2000 , XP,2003 and Windows Vista operating systems that allows for the automatic assignment of IP addresses in a network where there is no DHCP server present. APIPA automatically assigns an IP address in the class B network 169.254.0.0(Note: The Internet Assigned Numbers Authority (IANA) has reserved 169.254.0.0-169.254.255.255 for Automatic Private IP Addressing. As a result, APIPA provides an address that is guaranteed not to conflict with routable addresses.) when it cannot successfully obtain one from a DHCP server on a network.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.
This feature makes configuring and supporting a small Local Area Network (LAN) running TCP/IP less difficult. ie,Automatic Private IP Addressing(APIPA) also allows computers, using TCP/IP to connect to one another with the use of a hub or switch, without DHCP services available. Although this feature can be useful, it can also prevent systems administrators from detecting problems in a timely manner. You can, however,disable this APIPA feature in Windows Vista by any of the following methods:
- Start the Windows Vista registry editor by clicking Start, then, Run, and then entering regedit.
- You’ll need to provide administrative confirmation if User Account Control(UAC) is turned on.
- Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\Adapters
- Double click on the IPAutoconfigurationEnabled entry, and change its Value data to 0.
- If IPAutoconfigurationEnabled is not present there,then create it by Edit-> New-> DWORD value.
- Exit Windows Registry Editor.
- Restart your computer for the changes to take effect.
Or
- Start the Windows Vista registry editor by clicking Start, then, Run, and then entering regedit.
- You’ll need to provide administrative confirmation if User Account Control(UAC) is turned on.
- Navigate to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
- Right click this entry and select New Dword.
- Rename the new entry ArpRetryCount (leave it set to 0 by default).
- Exit Windows Registry Editor.
- Restart your computer for the changes to take effect.
Warning: Modifying the Windows registry can cause serious damage to your Windows Operating System.It is better to backup your Windows registry data before making any changes. Tomstricks.com is not responsible for any changes you may make to your system.
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Written by Tony on April 29th, 2009 with
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