Our DHCP Server, running on a Windows Server 2012 R2 Data Center, shows that we have 241 addresses total with 220 (91%) in use, 21 available. If I go to the Address Leases node and count all IP addresses manually, I get 78 IP addresses.
Where are the remaining addresses and how do I free them?
I already set the DHCP server scope and lowered the lease time to 1-hour on both boxes, rebooted them, and waited a day, and I still see 220 in use. We only have about the 78 devices, so that number is right, just I am at a loss of where the remaining IP addresses are, how to see them, and how to free them?
It would seem some sort of configuration, but the DHCP does not have that many options. Is there a cache or something?
I did see a page stating to delete all the addresses during off hours, however I can delete the 78 shown in "Address Leases" for the sub-net. What I cannot do is delete the roughly 120 other IP addresses. Why do I not see them? Yes, this article states deleting the scope and recreating it and possibly deleting the server roll and recreating that, but that is harsh. At first, I would like to see all the 220 IP addresses that are supposedly "in use".
UPDATE: PER REQUEST
Address Scope:
Reservation List
Address Leases Ordered by IP
Address Pool Showing No Exclusion Ranges
So for instance, where are .46, .47, .48, or any of the other unused addresses?
