Check MAC address and DHCP lease

Windows NT^® and Windows^® 2000 clients also have a utility that displays the client's MAC address and DHCP lease information. To check the DHCP lease for a Windows NT and Windows 2000 client, follow these steps:

Open a Command Prompt window.
Run IPCONFIG /ALL.

Note: This utility does not dynamically update the displayed information, so it will be necessary to rerun the utility to view updated status. You can use the same utility with different parameters to release and renew a lease (IPCONFIG /RELEASE and IPCONFIG /RENEW). Run IPCONFIG /? from an MS-DOS Command Prompt to see all of the possible parameters for the command.

Microsoft^® Windows 2000 DHCP clients need to be configured if you want the DHCP server to update DNS A records on behalf of the client. You might want to delegate updates to the DHCP server if your network has standard existing Windows clients like Windows 95 and NT, because these clients currently do not update DNS A records. This might simplify your DNS administration because DNS updates will originate from the DHCP server for all clients, rather than having some clients update their own records.