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How to Backup then Resort DHCP server with all Default values and reservation on windows NT4 ?

I have an old DHCP server of Windows NT4 with special Default values and reservation for Network printer and servers. We will close this server. so I have to install DHCP server on a new server[ OS is windows  NT4 also]  then restore all Default values and reservation for Network printer and servers
I tried to backup the old DHCP [dhcp.mdb , dhcp.pat and j500bcc9 files] then restore it on the new DHCP.

The problem is all Default values and reservation for Network printer and servers didn’t appear on the new DHCP server also the Excluded addresses didn’t appear . Only the Active leases menu was restored  with the Dynamic IPs  only Without reservation for Network printer and servers

So please tell me how to do copy the old DHCP with all its properties to the new DHCP

Note, the operating system is windows NT4 with SP6a

Thank you
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1 Solution
Try this:

To ensure that the defined DHCP scope and global properties are
not lost, you must make a backup copy of the following file before you
reinstall DHCP.


This file contains a copy of the registry entries for the configuration of
the DHCP server. The file is automatically updated by the DHCP Manager
every time the DHCP server is shutdown.

To restore the previous configuration with this file, perform the following

1. Remove and reinstall the Microsoft DHCP Server service.

2. Before restarting, reapply any service packs that are installed.

3. Restart the server to allow the installation to finish.

4. Click the Start button, point to Settings, and then click Control
   Panel. Double-click the Services icon, and select DHCP server from the
   Services dialog box. Click Stop, and then click Close. WARNING: Using
   Registry Editor incorrectly can cause serious, system-wide problems
   that may require you to reinstall Windows NT to correct them. Microsoft
   cannot guarantee that any problems resulting from the use of Registry
   Editor can be solved. Use this tool at your own risk.

5. Start Registry Editor (Regedt32.exe) and find the following subkey:

               \DHCP Server\Configuration

6. Select the Configuration key, then from the Registry menu, click
   Restore. Type the path to the backup copy of the Dhcpcfg file.

7. Click Yes at the warning message dialog box.

8. Exit Registry Editor.

9. Click the Start button, point to Settings, and then click Control
   Panel. Double-click the Services icon, and then select DHCP Server in
   the Services dialog box. Click Start, and then click Close.

The previously defined DHCP properties should now be in place. You may then
need to reconcile the database information using the steps outlined in the
Reconcile DHCP Information section in the following article in the
Microsoft Knowledge base:

nilehawkAuthor Commented:
hi Sebo2000
i didn't find the registry key  
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DHCP Server\Configuration

but i got what you want me to do. i will export the old key before the installation then restore it back after the reinstallation.

i will try this solution then i will tell you.
 buy the way where is the link for Microsoft Knowledge base:
nilehawkAuthor Commented:
Hi Sebo2000
the solution is working but
1- stop the DHCP service
2- you must delete all the configuration keys from registry then import it [ to prevent unwanted parameter to be added]
3-import the registry files
4- start the DHCP service

the problem now that all reservation didn't appear in the DHCP server while its registry key was imported successfully
please advise

thank you
nilehawkAuthor Commented:
thank you
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