DHCP:The specified address is not available

Follow me Recently I was trying to create a reservation for a MAC address in DHCP, Upon trying first I got an error “The specified address is not available”, I tried multiple times but was not able to create the entry even with a different set IP address. I re-validated the current reservation and leases but the specific Mac address isn’t listed. Upon further investigation I found that this MAC is somehow mapped to another reservation and isn’t visible, in a way its lingering. Here is what we did to resolve the issue 1) We took a dump of DHCP configuration using the following command     Netsh Dhcp Server Dump>Dump.txt 2) We searched the dump file for the problem Mac entry and we were able to find it. PS: The Mac entry in GUI might show associated to a different Mac address, but we need to delete that in order to fix the issue 3) We went ahead and deleted that reservation from the DHCP database. Now I was able to create the new reservation for the problem Mac. Feel free to report any new issue on our forum to seek expert help Follow...