config dhcp
option interface lan
option start <dhcp_start>
option limit <dhcp_limit>
option leasetime 1h
option ignore <lan_dhcp>
list dhcp_option '121,10.0.0.0/8,<lan_ip>,172.16.0.0/12,<lan_ip>'
list dhcp_option '249,10.0.0.0/8,<lan_ip>,172.16.0.0/12,<lan_ip>'
option interface wan
option ignore 1
option interface wifi