/ip firewall mangle add chain=prerouting per-connection-classifier=both-address-and-ports:7/0 action=mark-routing new-routing-mark=Rota1
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/1 action=mark-routing new-routing-mark=Rota1
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/2 action=mark-routing new-routing-mark=Rota2
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/3 action=mark-routing new-routing-mark=Rota2
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/4 action=mark-routing new-routing-mark=Rota3
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/5 action=mark-routing new-routing-mark=Rota3
/ip firewall mangle add chain=prerouting per-connection-classifier=both_address-and-ports:7/6 action=mark-routing new-routing-mark=Rota3