DHCP migration problem

[the_quick]

Hi Gus and Gals

 

So decided slowly to decommiso my 2008 DC and first was to move DHCP from it to new DC 2016. Stopped old DHCP on 2008 , copied backup filder under c:\windows\system32\dhcp and pasted into same location on new server.

Started clean DHCP on 2016 press restore - all went fine, authorised, no errors.

 

But it just doesn't serve IP addresses to clients, unless it is on server scope- I have few scopes - all were imported fine. Event viewer is not showing any errors with DHCP.

 

Step tried so far:

- disabled windows firewall to if this is maybe it, nope.

- reauthorised server

- deleted one scope and added new manually

- removing role and reinstalling it, importing DHCP through command line

 

New server has different computer name to old one and has different IP address.

 

I think for now will bring old dhcp back online. Normally I would kust recreate whole DHCP config, but with numerous scopes and reservation, it looks like very laborious task

Edited May 31, 2019 by the_quick

[steveg]

Do you have ip helpers configured on the switches pointing to the ip address of the old dhcp server?

[the_quick]

Sorted now, but Steve you were right on the ball .

 

I forgot we had that on our core switch which is as well doing our routing. As soon as I have added new server to the list all working.