Intermittent Blue Screen on Target Devices with an error NETWORK_BOOT_DUPLICATE_ADDRESS. The error was present using both PXE & BDM ISO



 

Solution 1

The solution to the problem is to delete the registry keys containing IP-addresses on the PVS Streaming Interface ( two Interfaces on my pvs target Devices ). The registry keys needs to be deleted in both ControlSet001 and ControlSet002.

Create a batch file with the following lines and run it just before shutdown whenever the vdisk has been in Read / Write mode or New Version Maintenance mode. Remember to replace the GUID with your own values.
 

REM * Remove IP-information to avoid duplicate IP bluescreens

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpServer /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpIPAddress /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpSubnetMask /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpSubnetMaskOpt /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpServer /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpIPAddress /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpSubnetMask /f

reg delete HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Services\Tcpip\Parameters\Interfaces\{6B367847-567F-4C19-B42E-EF27899A1F9D} /v DhcpSubnetMaskOpt /f

Solution 2

Create a simple script that the customer could tag on to the end of their existing shutdown processes for the Master VM whenever it is updated that:

Stops the DHCP client service: “Net stop DHCP”

Blanks the following registry keys: “regedit /s DHCP_clear.reg”

The DHCP_clear.reg file contained blank values for the following keys:

———————————————–

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]
“NameServer”=””

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{GUID_OF_NETWORK_ADAPTOR}]
“NameServer”=””
“Domain”=””
“DhcpIPAddress”=””
“DhcpSubnetMask”=””
“DhcpServer”=””
“DhcpNameServer”=””
“DhcpDefaultGateway”=””

Problem Cause

• VMs are using the cached registry information to send a renewal request to the DHCP servers as they come up.
• 50% of the time the DHCP server responds within the expected time and issues it a new address.
• The other 50% of the time the DHCP server doesn’t respond within the expected time frame so the client enters a rebinding state, broadcasting a DHCPDiscover message to any available DHCP servers to update its current IP address lease.
• While it waits for responses it is using the cached registry information for it’s address.
• As PVS streaming is happening over this address it conflicts with other VMs that are also experiencing the issue and kicks out to a blue screen before the DHCP server can sort out the mess ( DHCP is pretty good at this – but if it doesn’t do it quick enough it will be too late as the PVS target device has already failed.