Type the command “ipconfig /all”.,IP address is set to “Duplicate”

Basic Troubleshoot:

We need to change the assigned IP address,If it failed try to assign the different IP address segment and see if it is still the same,If yes then follow the steps it will occure in Windows 2008 edition.


  1. Go to the regedit.exe
  2. 2.Disable APIPA on All but One Network Adapter
  3. 3.Use Registry Editor to create the following registry key, where <var>adapter name</var> is the name of the Dynamic Host Configuration Protocol (DHCP) configured adapter where you want to disable APIPA:

Eg : HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\ Services\Tcpip\Parameters\Interfaces\{5a75adf3-f8ee-11e6-a6b2-806e6f6e6963}

4. Add the following value to this key:
Value name: IPAutoconfigurationEnabled
Value type: REG_DWORD
Value in hexadecimal: 0 (A value of 0 disables APIPA support on this adapter)

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

5. After you make this change, restart your computer.
After the procedure has been completed successfully, the auto configuration IP is gone but the static IP set is still unusable as it still termed as duplicate by the windows OS.

Here’s how to set the duplicate IP as the preferred IP:

  1. 1.Go to the regedit.exe
  2. Locate this registry key:
  3. New, and click DWORD Value
  4. Type ArpRetryCount
  5. Right-click the ArpRetryCount registry entry and click Modify. In the Value box, type 0 and click OK
  6.  Shut down the VM and start it again. Check the IP address of the NIC, the static IP should be set to preferred.

Reference Link: