Tuesday, January 29, 2013

DHCP migration - Fast and easy!

A friend show me a fast and easy way to migrate a DHCP server with all scope options and settings.  Thanks KB!

Go to your existing DHCP Server and open a command prompt.
Copy and paste the following command.
   netsh dhcp server dump > DHCPsetting.txt

This will dump all your settings into a text document.  You can now copy the document over to the new server.

Now go to your new DHCP server and add the DHCP server role to the server.  Open the text document and use the replace feature to replace the old ip address with the new one.  (don't forget about changing your ip helpers)  Once the find and replace is finished select all the text and copy it to the clipboard.

Finally open a command prompt and type netsh
Now all you need to do is paste all the text from the clipboard and voila your server is up and running.

Now is the time to confirm your new server is authorized and your old server deauthorized.

But wait, there are a bunch of devices out there with ip addresses.  Never fear captain reboot is here.  I prefer to bounce (reboot) the network switches.  So this is also a good time to make sure your ip helper addresses are correct in those switches.  Make sure the configuration is saved!!!  It shouldn't take very long and this is something you probably should be doing after hours anyhow.

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