Error option “6.” while importing DHCP database from Windows Server 2003 to another Windows Server 2008 R2

I had this question after viewing Moving DHCP scope fro 2003 to 2008 R2.

When we tried to import the scope (to 2008 R2) that we exported (on 2003) we got an error. Please note that the 2008 R2 server we are trying to import the scope to already has DHCP running (authorized) and it servicing other scopes that we WANT TO KEEP, thus we are trying to append to that DHCP server. We got an error option "6" when importing (as noted below), but I don't want to delete the Server Options entries 006 and 015 as I don't know what impact that would have on the existing scope.
Error while importing option “6.” while moving DHCP database from Windows Server 2008 to another Windows Server 2008/2003 or 2008 R2


To move DHCP from one server (2003/2008) to another you can use the following steps
1.At the command prompt type netsh dhcp server export C:\dhcpdata.txt all , and then press ENTER.

Note: You must have local administrator permissions to export/import the data.

Configure the DHCP server service on the server that is running Windows Server 2008
1.Add DHCP Server Role
2.Make sure to Authorize DHCP while installing the Role.

Import the DHCP database
1.Copy the exported DHCP database file to the local hard disk of the Windows Server 2008-based computer.
2.At the command prompt, type netsh dhcp server import c:\dhcpdata.txt all and press ENTER

If might receive the following error

“Error while importing option “6.” “This option conflicts with the existing option “” An Internal Error Occurred.”

It is because by default when you install DHCP Server Role, it puts the following entries in Server Options.

006 DNS Server
015 DNS Domain Name

To fix the Error –> Just delete the above two entries from Server options and Run the Import DHCP database command again.
Laszlo DenesAsked:
Who is Participating?
bbaoIT ConsultantCommented:
be aware two things: :)

1. you can edit the exported file which is in plain text per your needs.

2. if the configurations are not complicated say just a few scopes and options, manually creating them on the target server from the scratch might be the best option, at least a time-saving way.
bbaoIT ConsultantCommented:
did you delete DHCP.MDB on the target W2K8 server before importing the data file?

did you check this MSKB?

How to move a DHCP database from a computer that is running Windows Server 2003 to Windows Server 2008
Laszlo DenesAuthor Commented:
Yes, we did BUT we are NOT trying to move the scope to just another server, rather to a server that already has an authorized DHCP role with existing scopes that must remain! My own investigation suggests that we really need is a MERGE, i.e. exporting and  importing not ALL, but rather only the specific scopes as noted here.
From the NETSH DHCP SERVER command prompt, you may then export and import scopes by following the examples below.
Export examples
The following command exports the full service configuration to the c:\Temp\Dhcpdb file:
export c:\temp\dhcpdb all
The following command exports the configuration that pertains to scopes and to the c:\Temp\Dhcpdb file:
export c:\temp\dhcpdb

Import examples
The following command imports the full configuration from the c:\Temp\Dhcpdb file:
import c:\temp\dhcpdb all
The following command imports the configuration pertaining to scopes and from the c:\Temp\Dhcpdb file:
import c:\temp\dhcpdb
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