有大佬能给看看这qos是啥意思嘛

traffic classifier cla-5-in-shishi operator and 

 if-match acl 3851 

# traffic classifier cla-5-out-shishi operator and 

 if-match dscp cs4 

# traffic classifier cla-6-in-shipin operator and 

 if-match acl 3861 

# traffic classifier cla-6-out-shipin operator and 

 if-match dscp ef 

# traffic behavior beh-5-in-shishi 

 remark dscp cs4

 # traffic behavior beh-5-out-shishi 

 queue af bandwidth 6144 

# traffic behavior beh-6-in-shipin 

 remark dscp ef 

# traffic behavior beh-6-out-shipin 

 queue ef bandwidth 6144 cbs 102400

大佬们，这个东西看不太懂，这个东西如果要用是不是必须得调用到接口下面啊，那接口下面应该会有qos的字样吧