Event ID 10021 — DHCPv6 Server Service

Applies To: Windows Server 2008

Dynamic Host Configuration Protocol (DHCP) can lease both Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) addresses. If IPv6 is not available, the DHCP service uses IPv4 only.

Event Details

Product: Windows Operating System
ID: 10021
Source: Microsoft-Windows-DHCP-Server
Version: 6.0
Message: DHCPv6 service failed to initialize the database. The following error occurred:


Restore the DHCP database 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 the DHCP Microsoft Management Console (MMC) snap-in 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.


To verify that the DHCPv6 service is running:

  1. At the DHCPv6 server computer, click Start, click Run, and then type cmd.
  2. At the command prompt, type sc queryex dhcp.
  3. The DHCPv6 Server service state should be displayed as RUNNING.

DHCPv6 Server Service

DHCP Infrastructure