QOS限速无效的问题

在交换机端口配置流量监管无效是什么原因(交换机型号S5500-28-EI)
配置如下：
acl number 3200
rule 0 premit ip source 192.168.1.5 0
traffic classifier limit_traffic operator and 
     if-match acl 3200 
traffic behavior limit_traffic
    car cir 128 cbs 50000 ebs 0 green pass red remark-dscp-pass default yellow pass 
qos policy 3200 
     classifier limit_traffic behavior limit_traffic
interface GigabitEthernet1/0/24 
     qos apply policy 3200 inbound


下载速度远高于128

以下是GigabitEthernet1/0/24号端口的数据
Classifier: limit_traffic 
Operator: OR Rule(s) :
   If-match acl 3200 
   Behavior: limit_traffic 
      Committed Access Rate: 
      CIR 128 (kbps), CBS 50000 (byte), EBS 0 (byte) 
       Green Action: pass 
       Red Action: remark dscp default and pass 
       Yellow Action: pass Green : 297380(Packets) Red : 927072(Packets)