Defining Scoped Statements
The concept of scoped statements in a DHCP server configuration file is shown in
Figure 242.
In this example, you see the following:
vOptions A, B, and C are global. They are inherited by all clients in the network
unless overridden by a value for the same option at a lower level in the network.
vDHCP options that you define at a global level are overridden by options defined
in a globally defined client for that client only.
vDHCP options that you define at the subnet level override options defined at the
global level for clients falling in that subnet.
vClients that you have not specifically defined automatically fall into a specific
location in the hierarchy based on their current network location.
vA client that requests a class must fall within a subnet in which the class is
defined, or you must globally define the class, before the client receives options
from the class.
vOptions defined for a client override options in a class requested by the client,
provided the class is legal for that client.
vVendor options are always defined globally so that every client that requests a
vendor is served the same options.
Figure 242. DHCP Hierarchy
410 OS/400 TCP/IPConfiguration and Reference V4R4