Disable IPV6 in Windows 2008 Server or Vista

Today while installing 2008 failover cluster, I got error or notification from SQL server that two of my servers have same IPV6 address. Because I don’t use IPV6 and I have disabled it in network properties it was a bit weird to see this message.

Then I run ipconfig command that showed to me lot of Tunnel adapters that were disconnected and created automatically by Vista.

So to have painfree installation of the new cluster I have disabled IPV6 protocol totally.

Here is solution:

  • Start->Run with win key + r or by start menu
  • regedit
  • go to HKLM\System\CurrentControlSet\Services\Tcpip6\Parameters
  • add new dword (32bit) value DisableComponents with value 1
  • restart
  • enjoy