Code Len IPv4 Configuration Server Address(es)For more information refer to the RFC5859
+-----+-----+-----+-----+-----+-----+
| 150 | n | IPv4 address | ...
+-----+-----+-----+-----+-----+-----+
config system dhcp serverThe option contains both IP addresses appended in hexadecimal notation.
edit 3
set default-gateway 1.1.1.1
set interface "port1"
config ip-range
edit 1
set end-ip 10.10.10.50
set start-ip 10.10.10.1
next
end
set netmask 255.255.255.0
set option1 150 'C0A80101C0A80102'