mls qos #全局开启QOS
ip access-list extended PC1
permit ip host 192.168.1.1 any #假设PC IP为192.168.1.1,这条匹配PC1上行流量
permit ip any host 192.168.1.1 #这条匹配表示PC1下行流量
class-map match-all PC1_Traffic
match input-interface PC1
policy-map LIMIT
class PC1_Traffic
police cir 40000 conform-action transmit exceed-action drop #5KB/s,即5000*8=40000bit/s
int f0/12
service-policy input LIMIT #3560只能用在input方向