My Windows Server 2008 based DHCP server related settings:
这里，LeaseExtension设置为10 minutes，意味着默认4个小时的grace period缩短到10分钟。DatabaseCleanupInterval默认为60 minutes，即默认每小时执行一次DHCP database cleanup.
本文出自 “sukhoi” 博客，谢绝转载！
Configure Windows Server 2008 based DHCP database cleanup interval & lease grace period