Search for a MAC address in DHCP?

[ReverentCreature]

I have a client that I need to add a IP Reservation for. When I try and add it in, DHCP says it cannot add it as the MAC address has ben added in already.

 

The thing is...

MAC addresses are not listed, only names so I don't know which one I need to delete.

The computer has been rebuilt and renamed.

 

How can I track down this MAC address so I can remove it for re-adding?

 

Thanks

[mikkydoos]

They are listed. It means there is an existing lease or reservation for that MAC address. In windows the MAC is listed as 'Unique ID'

 

If not there go to View ---> add remove columns.

 

Look in your address leases and delete the entry that corresponds with your desired MAC.

 

Then add the reservation.

Edited May 10, 2017 by mikkydoos

[synaesthesia]

Handy tip for that, as the DHCP console isn't great for looking for information, export the list to CSV and use Excel to sort/search at your leisure.

[Willott]

If you mean that mac addresses aren't listed in the left hand side under reservations, switch to address leases view and you should see the mac there and be able to see the device name to find it in reservations.

[ReverentCreature]

That's brilliant. I was able to find it and remove it from the Address Leases screen.