"NET[/MASK]" – destination network/host IP-address. The parameter can be specified in the following formats:
network-address/mask length;
network-address:mask;
network-address;
default.
"GATEWAY" – IP-address of a router through which a destination network/host is attainable.
delete NET[/MASK]
Deletes a route from a table.
[-iface]
Routing through the network interface. An IP-address of the interface through which routing is assigned becomes a gateway IP-address.
[-nostatic]
All routes that are described using the "route add" command have absolute priority. No dynamic routing protocols including DHCP can replace the static route in the routing table. "nostatic" option deny that.
E.g. DHCP may place a new default route in the table, after it disappears a static route will be restored to the previous value.