TC限速

规则：

DEV=ethc0
#初始总带宽
BW_TOTAL=1mbps
#清除规则
tc qdisc del dev $DEV root
tc qdisc add dev $DEV root handle 1: htb default 40
tc class add dev $DEV parent 1: classid 1:1 htb rate $BW_TOTAL
tc class add dev $DEV parent 1:1 classid 1:10 htb rate 1mbit ceil 1mbit
tc class add dev $DEV parent 1:1 classid 1:40 htb rate 1mbit ceil 1mbit
tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev $DEV parent 1:40 handle 40: sfq perturb 10

查看：
tc class show dev ethc0
tc qdisc show