tc qdisc del dev eth0 root
tc qdisc add dev eth0 root handle 1:0 htb default 10
tc class add dev eth0 parent 1:0 classid 1:10 htb rate 1gbps prio 0
-tc class add dev eth0 parent 1:0 classid 1:20 htb rate 20mbit ceil 16mbit prio 0
+tc class add dev eth0 parent 1:0 classid 1:20 htb rate 50mbit ceil 100mbit prio 0
tc class add dev eth0 parent 1:0 classid 1:30 htb rate 1mbit ceil 1mbit prio 0
tc filter add dev eth0 parent 1:0 prio 0 protocol ip handle 20 fw flowid 1:20