Article ID: 198541
Article Last Modified on 11/1/2006
APPLIES TO
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Server 4.0 Enterprise Edition
This article was previously published under Q198541
SYMPTOMS
When you use the DHCPCMD command ADDRESERVEDIP to modify an existing
reservation, error 20022 (ERROR_DHCP_RESERVEDIP_EXISTS) is returned. When
you subsequently inspect the reservation using DHCP ADMIN, the reservation
has been turned into an active lease. If DHCPCMD is run again to modify the
lease, it works correctly and is turned back into a reservation.
CAUSE
This is a problem in DHCP server, which incorrectly handles the
modification of an existing reservation, causing the reservation to be
partially deleted. This results in the remaining data looking like an
active lease.
Running the same command again causes the reservation to be correctly re-
added.
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or
the individual software update. For information on obtaining the
latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft
Product Support Services. For a complete list of Microsoft Product Support
Services phone numbers and information on support costs, please go to the
following address on the World Wide Web:
STATUS
Microsoft has confirmed this to be a problem in Windows NT version 4.0.
This problem was first corrected in Windows NT version 4.0 Service Pack 5.
Additional query words: 4.00 dhcpadmn tcpip
Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB198541