DHCP Issues

Nik
Nik used Ask the Experts™
on
We have one DHCP server with one Superscope and around 15 scopes in it.
As we had some issues on our VLAN environment, we had to remove all 15 scopes from the superscope. When the last scope was removed from the Superscope, superscope was deleted automatically.

Now, everything is working fine, but after the server restarts, users complained that they still experience 'old' DHCP issues when physically changing VLAN's.

Therfore, I've checked the DHCP and I was more than surprised when I've seen that all DHCP scopes are located in Superscope. As if nothing was done before the server restarted.

It looks like that DHCP was restored or like DHCP superscope was recreated.
Should I mention that DHCP server is using Windows Server 2008 R2 OS.

Any ideas?
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Commented:
Delete the superscope directly, not just the scopes within it.
You do not need to reboot the server, just restart the DHCP server service, then check if the superscope is still there.

Commented:
This seems to confirm it:
http://www.tek-tips.com/viewthread.cfm?qid=1366578&page=26

Delete the superscope directly.
NikSystems Specialist

Author

Commented:
Ok, if I delete the superscope directly, will I have to recreate scopes that were in it?

Commented:
Yes - the scopes will be gone & will have to be recreated.
NikSystems Specialist

Author

Commented:
Ok, I will try to backup the current setting where I have removed the scopes from the superscope and then I will try to delete the superscope and make a restore. Will see if that will work.
NikSystems Specialist

Author

Commented:
Here's what I did.
I've tried to remove all of the scopes from the superscope instead of one.
Then, I've tried to delete the superscope, where server notified me that existing child scopes [b]won't[/b] be deleted in the superscope.
After the service restart, superscope was recreated, butwith only one scope out of it. The one that was part of the superscope when I was deleting it.

So, it is not necessary to recreate scopes. You can simply delete the superscope and all child scopes will remain active.

NOTE: This applies to Windows Server 2008 R2. If anyone tries this with any previous Microsoft DHCP, please make a backup of your DHCP database.

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial