TCA="tc class add dev tun21"

TFA="tc filter add dev tun21"

TQA="tc qdisc add dev tun21"

SFQ="sfq perturb 10"

tc qdisc del dev tun21 root

tc qdisc add dev tun21 root handle 1: htb

tc class add dev tun21 parent 1: classid 1:1 htb rate 10000kbit

$TCA parent 1:1 classid 1:10 htb rate 2000kbit ceil 5000kbit prio 2

$TQA parent 1:10 handle 10: $SFQ

$TFA parent 1:0 prio 2 protocol ip handle 10 fw flowid 1:10

iptables -t mangle -A POSTROUTING -m iprange --dst-range 10.8.0.1-10.8.0.1.254 -j MARK --set-mark 10

TCAU="tc class add dev imq0"

TFAU="tc filter add dev imq0"

TQAU="tc qdisc add dev imq0"

modprobe imq

modprobe ipt_IMQ

ip link set imq0 up

tc qdisc del dev imq0 root

tc qdisc add dev imq0 root handle 1: htb

tc class add dev imq0 parent 1: classid 1:1 htb rate 10000kbit

$TCAU parent 1:1 classid 1:10 htb rate 2000kbit ceil 5000kbit prio 2

$TQAU parent 1:10 handle 10: $SFQ

$TFAU parent 1:0 prio 2 protocol ip handle 10 fw flowid 1:10

iptables -t mangle -A PREROUTING -m iprange --src-range 10.8.0.1-10.8.0.1.254 -j MARK --set-mark 10

iptables -t mangle -A PREROUTING -j IMQ --todev 0