QoS 3650 and priority queueing

[rene.caspari]

Hello, I'm trying to configure simple egress priority queueing for trusted ef-marked traffic:

!
table-map TBM_DSCP2COS_VOICE
  map from 46 to 6
  map from 40 to 6
  default copy
!
class-map match-any CLM_EF
  description EF traffic
  match cos 6 
!
policy-map PLM_OUTPUT
  class CLM_EF
  priority level 1
!
policy-map PLM_TABLE_VOICE
  class class-default
    set cos dscp table TBM_DSCP2COS_VOICE
!
interface GigabitEthernet1/0/17
  service-policy input PLM_TABLE_VOICE
  service-policy output PLM_OUTPUT
!
interface GigabitEthernet5/0/11
  service-policy input PLM_TABLE_VOICE
  service-policy output PLM_OUTPUT
!

(5x 3650 stacked switchmembers)

But I cant see any packet matches:

#sh policy-map interface gi1/0/17
GigabitEthernet1/0/17

Service-policy input: PLM_TABLE_VOICE

Class-map: class-default (match-any) 
1814 packets
Match: any 
QoS Set
cos dscp table TBM_DSCP2COS_VOICE

Service-policy output: PLM_OUTPUT

queue stats for all priority classes:
Queueing
priority level 1

(total drops) 0
(bytes output) 93566

Class-map: CLM_EF (match-any) 
0 packets
Match: cos 6 
0 packets, 0 bytes
5 minute rate 0 bps
Priority: Strict, 

Priority Level: 1

Class-map: class-default (match-any) 
0 packets
Match: any 


(total drops) 0
(bytes output) 641361

Although I can see COS6 packets leaving Gi1/0/17 (sh platform hardware fed ...)

Do you have any ideas?

[rene.caspari]

I think I got it, so I answer to myself: https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-congestion-avoidance/10107-showpolicy.html

IIRC the counter only increases in case of congested interfaces.

[Joseph W. Doherty]

Also keep in mind, sometimes on the "low end" switches, higher level counters aren't always updated as you would expect.