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3750 MLS Policing issue

I am not sure if I am doing the right thing here.

I am trying to policed voice traffic on a 3750 and remarked it from CS3 to dscp 8

interface FastEthernet1/0/11

switchport access vlan 10

switchport mode access

switchport voice vlan 20

speed 100

duplex half

mls qos trust device cisco-phone

mls qos trust cos

spanning-tree portfast

service-policy input mark-sccp

policy-map mark-sccp

class mark-sccp

set dscp cs3

police 9000 8000 exceed-action policed-dscp-transmit

class-map match-all mark-sccp

match access-group 101

access-list 101 permit tcp any any eq 2000


mls qos map policed-dscp 24 to 8

mls qos map cos-dscp 0 8 16 24 32 46 48 56

How do you see that the marking has changed if it exceeds 9000 in the scenario?

No matter how much traffic I put , i don't seem to any change in the statistics.