Show DHCP Class ID Information at a Client Computer
Updated: October 16, 2008
Applies To: Windows Server 2008
You can use the ipconfig /showclassid command to show DHCP class ID information at a client computer.
Membership in the Domain Admins group, or equivalent, is the minimum required to complete this procedure.
At a DHCP-enabled client computer running Windows XP or Windows Vista, open a command prompt.
Use the Ipconfig command-line tool to show the DHCP class ID that the client uses when obtaining its lease from the DHCP server.
The following example shows Default BOOTP Class for Local Area Connection is currently set as the DHCP class ID at the client computer:
C:\>ipconfig /showclassid "Local Area Connection" Windows IP Configuration DHCP Class ID for Adapter "Local Area Connection": DHCP ClassID Name . . . . . . . . : Default BOOTP Class DHCP ClassID Description . . . . : User class for BOOTP clients
For a DHCP options class to be in effect between the DHCP server and its clients, both must be configured with a matching DHCP class ID string that identifies the client as a member of a specific user or vendor options class when it obtains its address lease from the server.