mask
The mask field sets the subnet mask for the defined network interface. This field should be left empty when using DHCP.
Summary
FIELD 	mask
PATH 	network[N].mask
PARENT 	network
TYPE 	String
DEFAULT 	""
Example
[[network]]
  ip = "192.168.1.10"
  mask = "255.255.255.0"
  gateway = "192.168.1.253"
CLI Flag
--network[0].mask="255.255.255.0"