Question : DHCP Lease with no Computer Name

Hi,
I am running a Domain Controller on a Windows Server 2008 box. It is running DHCP, DNS and WINS. When I launch the DHCP management console, and view the DHCP leases, I often see 3-4 leases where the Computer Name is Blank and the mac address is not.
At the moment, I can not ping these IP addresses.
I also can not connect to the switch to analyze the arp table as the switch is not a managed switch.

Any help tracking this problem down would be greatly appreciated.

Answer : DHCP Lease with no Computer Name

That's actually quite common. Networked Printers, Wireless Access Points, NAS devices, Mobile Phones connected to a wireless network can all cause this if they don't report their names to DHCP properly.

Reasonably common, nothing I would worry about too much. Don't forget you can tell by the DHCP lease expiry time approximately when the devices were last connected. For example if the lease expires on August 7th 2009 at 08:00 and your scope is set to lease addresses for 3 days, the device was last connected on August 4th.

-Matt