Tuesday 17 February 2015

Duplicate IP error on a VM Unable to connect to Network

Symptoms :
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  •     Unable to connect the Virtual machine to the Network
Purpose :
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  •     To get the Virtual machine to the network.
Cause :
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  •     Only Windows 2008 machines were getting the duplicate IP errors.
  •     Tried resetting TCP/IP stack.
  •     Tried providing different static IP : same problem
Resolution :
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When this problem occurs, the ProxyArp device responds to all ARP requests.
To work around this problem, we can turn off gratuitous ARP by setting the value of the ARPRetryCount registry entry to 0. To do this, follow these steps.

1.  Click Start , type regedit in the Start Search box, and then press ENTER.
2.  Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3.  On the Edit menu, point to New , and then click DWORD Value .
4.  Type ArpRetryCount .
5.  Right-click the ArpRetryCount registry entry, and then click Modify .
6.  In the Value data box, type 0 , and then click OK .
7.  Exit Registry Editor.
8. Rebooted the machine

See below link :
http://social.technet.microsoft.com/Forums/en-US/windowsserver2008r2networking/thread/d7bda315-6366-4e0a-bdcf-dc875ff6963e

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