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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The Author — Nirmal Sharma

Nirmal Sharma avatar

Nirmal Sharma is a MCSEx3, MCITP and was awarded the Microsoft MVP award in Directory Services and Windows Networking. He specializes in Microsoft Azure, Office 365, Directory Services, Failover Clusters, Hyper-V, PowerShell Scripting and System Center products. Nirmal has been involved with Microsoft Technologies since 1994. In his spare time, he likes to help others and share some of his knowledge by writing tips and articles on various sites and contributing to PowerShell-based Dynamic Packs for www.ITDynamicPacks.Net solutions.

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