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With the BloxOne DDI application, you can configure DHCP properties at the global level. You can also configure properties to the DHCP configuration profile. Properties can also be assigned to IP space, DHCP host, address block, subnet, address range, and fixed address levels. The DHCP properties follow a top-down inheritance hierarchy in which child objects automatically inherit DHCP properties from their parent objects. Thus, global DHCP properties remain at the top of the hierarchy and are inheritable to all child objects unless you override them at the object level.
For example, when you set DHCP properties for a particular DHCP server, these properties override the Global DHCP settings and apply to all objects served by that DHCP server. Properties set at the DHCP Server level override global settings and apply to the objects that reside beneath the DHCP server level. Properties set at the network level override object-level settings and apply to the objects within the network. Properties set for a DHCP range override those properties set at higher levels. For information about global DHCP properties, seeConfiguring Global DHCP Properties.
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Inheritance Hierarchy
The DHCP inheritance chain is based on a parent-child relationship where all objects above an object are considered parent objects to that object. All objects below the object are considered child objects to the object. A child object inherits the properties of its parent objects. When an object’s inheritance is overridden, the default, global  hierarchical chain is broken, and properties may be assigned directly to the object at the object level.
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