From the dhcpd.conf(5) man page:
Quote:
The shared-network statement is used to inform the DHCP server that some
IP subnets actually share the same physical network. Any subnets in a
shared network should be declared within a shared-network statement.
Parameters specified in the shared-network statement will be used when
booting clients on those subnets unless parameters provided at the subnet
or host level override them. If any subnet in a shared network has
addresses available for dynamic allocation, those addresses are collected
into a common pool for that shared network and assigned to clients as
needed. There is no way to distinguish on which subnet of a shared
network a client should boot.
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My recommendation:
don't use it. Use the subnet statement, instead.