先做好一个PCQ的限速
http://bbs.routerclub.com/viewthread.php?tid=5897

下边在开始进入正题
ROS的流量监控只能监控不同网卡的流量收发
假如wan口的带宽是10M我们在9M的时候开启控制条件.
/tool traffic-monitor
add name=pcqon interface=WAN on-event=pcqon threshold=9000000 trigger=above traffic=received

/system script add name="pcqon" source="/queue tree enable queue1 " owner="admin" policy=reboot,read,write,policy,test
在带宽使用低于7M时关闭流量控制
/tool traffic-monitor
add name=pcqoff interface=WAN on-event=pcqoff threshold=7000000 trigger=below traffic=received

/system script add name="pcqoff" source="/queue tree disable queue1 " owner="admin" policy=reboot,read,write,policy,test