a lease for a client connected to a subnet that does not belong to a shared
network. The first argument includes the client identification information.
The second and third arguments identify the subnet. The fourth argument
-specify the shared network, if the subnet belongs to a shared network.
+specifies the shared network, if the subnet belongs to a shared network.
There are many reasons for failing lease allocations. One of them may be the
address pools exhaustion or existing reservations for the free leases.