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Event ID 1021 — DHCP Database Integrity

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Applies To: Windows Server 2008

Database integrity refers to the ability of the Dynamic Host Configuration Protocol (DHCP) database to function properly, maintaining an uncorrupted state.

Event Details

Product: Windows Operating System
ID: 1021
Source: Microsoft-Windows-DHCP-Server
Version: 6.0
Symbolic Name: EVENT_SERVER_LOAD_JET_FAILED
Message: The DHCP service could not load the JET database library successfully.

Resolve

Repair database and restore from a known good backup

If the DHCP server database becomes corrupted or is lost, recovery is possible by replacing the server database file (Dhcp.mdb), located in the %SystemRoot%\System32\Dhcp folder, with a backup copy of the same file.

If DHCP Manager was used previously to perform a backup, you can obtain the backup copy of the server database file located in the %SystemRoot%\System32\Dhcp\Backup folder. You can also restore the Dhcp.mdb file from a tape backup or other backup media.

To perform these procedures, you must be a member of the Administrators group, or you must have been delegated the appropriate authority.

To restore a backup copy of the DHCP database:

  1. Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as Administrator.
  2. Type net stop dhcpserver, and then press ENTER.
  3. Type md c:\olddhcp, and then press ENTER.
  4. Type move %SystemRoot%\system32\DHCP\*.* c:\olddhcp, and then press ENTER.
  5. Type del %SystemRoot%\system32\DHCP\Dhcp.md, and then press ENTER.
  6. Type copy%SystemRoot%\system32\dhcp\backup\jet\new\dhcp.mdb%SystemRoot%\system32\dhcp\dhcp.mdb, and then press ENTER.
  7. Type net start dhcpserver, and then press ENTER.

Verify

Confirm that the server starts successfully and without errors.

DHCP Database Integrity

DHCP Infrastructure