QoS in C6500 Sup2T

Question

Hi Everyone,
I've got a C6504 Chassis with Sup2T with default qos configuration (auto qos default gobal command). When I use the "show platform qos ip" command I can see the following output:
QoS Summary [IPv4]: (* - shared aggregates, Mod - switch module, Sid - Switch Id, E - service instance)
                     (^ - class-copp keyword)
          Int  Sid Mod Dir  Class-map DSCP  Agg  Trust Fl      AgForward      AgPoliced
                                            Id         Id                            
           CPP   1  1  In ^mcast-v4-    0    1     No  0              0              0
           CPP   1  1  In ^match-igm   48    2     No  0              0              0
           All   1  1   -    Default    0    0*    No  0 11780258945376              0
           All   1  4   -    Default    0    0*    No  0 28254137334635              0
1. ¿Why I can only see traffic with DSCP=0 if I know there are traffic with different DSCP markings passing through my C6504?
The interfaces are properly configured to trust cos markings and queue traffic
MLS#show queueing interface gi1/1/1
Interface GigabitEthernet1/1/1 queueing strategy:  Weighted Round-Robin
Port QoS is enabled globally
  Queueing on Gi1/1/1: Tx Enabled Rx Enabled
MLS#interface GigabitEthernet1/1/1
switchport
platform qos trust cos
2. Does the Sup2T with default qos configuration rewrite to 0 all DSCP markings by default?
Thank you in advance.

Answer 1

What is the IOS version you are running & what is the line card in your chassis module  1 ?, the commands output seems different what I am seeing in one of my Sup2T.
CR01#sh ver | in Soft
Cisco IOS Software, s2t54 Software (s2t54-ADVENTERPRISEK9-M), Version 15.1(2)SY, RELEASE SOFTWARE (fc4)
CR01#show platform qos ip
   QoS is in queueing-only mode
CR01#show queueing interface g6/1
Interface GigabitEthernet6/1 queueing strategy:  Weighted Round-Robin
  Port QoS is enabled globally
  Queueing on Gi6/1: Tx Enabled Rx Enabled
Trust boundary disabled
  Trust state: trust DSCP
  Trust state in queueing: trust COS
  Extend trust state: not trusted [COS = 0]
  Default COS is 0
    Queueing Mode In Tx direction: mode-cos
    Transmit queues [type = 1p3q4t]:
    Queue Id    Scheduling  Num of thresholds
       01         WRR                 04
       02         WRR                 04
       03         WRR                 04
       04         Priority            01
    WRR bandwidth ratios:  100[queue 1] 150[queue 2] 200[queue 3]
    queue-limit ratios:     50[queue 1]  20[queue 2]  15[queue 3]  15[Pri Queue]
    queue tail-drop-thresholds
    1     70[1] 100[2] 100[3] 100[4]
    2     70[1] 100[2] 100[3] 100[4]
    3     100[1] 100[2] 100[3] 100[4]
    queue random-detect-min-thresholds
      1    40[1] 70[2] 70[3] 70[4]
      2    40[1] 70[2] 70[3] 70[4]
      3    70[1] 70[2] 70[3] 70[4]
    queue random-detect-max-thresholds
      1    70[1] 100[2] 100[3] 100[4]
      2    70[1] 100[2] 100[3] 100[4]
      3    100[1] 100[2] 100[3] 100[4]
    WRED disabled queues:   
    queue thresh cos-map
    1     1      0
HTH
Rasika
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