qos的dscp重标记问题

为什么最简单的dscp都重标记不了

acl number 2000
rule 5 permit source 192.168.1.1 0
#
traffic classifier 1 operator and
if-match acl 2000
#
traffic behavior 1
remark dscp cs6
statistic enable
#
traffic policy 1
classifier 1 behavior 1

interface GigabitEthernet0/0/1
traffic-policy 1 inbound
#

在0/0/2口抓包dscp没有更改