A Quick Tip To Modify The Interval For DHCP Database Cleanup

by [Published on 18 Feb. 2010 / Last Updated on 31 May 2009]

This article explains how you can modify a registry entry to change the default interval for DHCP Database cleanup process.

DHCP Server must delete the "expired records" from its database (dhcp.mdb file) so that it releases space for new IP Addresses. By default, it does every 4 hours. You can modify this value by hacking the following registry entry:

  • KEY Name: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DHCPServer
  • Entry Name: DatabaseCleanupInterval
  • Type: REG_DWORD
  • Value: (in minutes), default is 4 hours.


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