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Recreate a scope in DHCP Server.

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by mak1515

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Recently I'm tried to recreate a scope in DHCP Manager. But When I type in the start address and end address, I got this message, "The specifed range either overlays with an already existing range or is invalid." The way I did is delete the orginal scope, then go to -scope/create. Is it I need to stop the DHCP Server first??? If you know anything about it, I'll be happy to know them! Thanks!

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by ian mclaws

Hi There,

There's a couple of things you can try.
1. After deleting the previous scope, close the DHCP manager and stop and restart the DHCP service (or reboot the server)
2. If it still won't let you create the scope, with the error you mentioned, there is probably registry "residue" that contains the deleted scope. This can be affected by incorrectly changing your DHCP database, which can cause it to restore itself from a DHCP backup (repair folder). Again, make sure you are deleting thescope, and then completely restarting the DHCP service before attempting to add the new scope.
3. If, after doing 1 and 2 you still cannot add the scope, yet the old scope is no longer visible in DHCP manager, you can delete the scope directly in the registry. This should not be attempted, except as a last resort. If you need, you can contact me (peer mail) and I can give you the registry edit required for this, as a last ditch effort.) I have successfully edited scopes from a registry many times.

Let me know,

Ian

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