mls qos
class-map match-all output-class
match ip dscp 0
policy-map output-policy-300M
class output-class
police 300000000 1000000 exceed-action drop
interface FastEthernet ?/?
service-policy input output-policy-300M
注意红字部分,网上的都是output,但是我改成了input才能用,因为这是在被限速的端口上应用的