6500 DSCP Trust

In the Catalyst 6500s, it's not easy to get QoS stats from the CLI for each of your DSCP markings.  To work around this, I came up with a quick DSCP trust policy to replace the standard command "mls qos trust dscp".  It breaks out the traffic stats for each of the commonly used DSCP markings, so you can get load-interval statistics while troubleshooting, without needing to look at NetFlow data.

Here are the class-map and policy-map definitions:

class-map match-all cs6
  match  dscp cs6
class-map match-all ef
  match  dscp ef
class-map match-all af41
  match  dscp af41
class-map match-all cs4
  match  dscp cs4
class-map match-all af31
  match  dscp af31
class-map match-all cs3
  match  dscp cs3
class-map match-all af21
  match  dscp af21
class-map match-all cs2
  match  dscp cs2
class-map match-all af11
  match  dscp af11
class-map match-all cs1
  match  dscp cs1

policy-map trust_dscp
  class cs6
    trust dscp
  class ef
    trust dscp
  class af41
    trust dscp
  class cs4
    trust dscp
  class af31
    trust dscp
  class cs3
    trust dscp
  class af21
    trust dscp
  class cs2
    trust dscp
  class af11
    trust dscp
  class cs1
    trust dscp
  class class-default
    trust dscp

Here is the application:

interface TenGigabitEthernet8/1
 service-policy input trust_dscp

Here are the stats available via the CLI:

6509-1>show policy-map interface TenGigabitEthernet8/1

 TenGigabitEthernet8/1

  Service-policy input: trust_dscp

    class-map: cs6 (match-all)
      Match:  dscp cs6 (48)
     trust dscp
      Earl in slot 8 :
        84886844 bytes
        5 minute offered rate 1056 bps
        aggregate-forwarded 84886844 bytes

    class-map: ef (match-all)
      Match:  dscp ef (46)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: af41 (match-all)
      Match:  dscp af41 (34)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: cs4 (match-all)
      Match:  dscp cs4 (32)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: af31 (match-all)
      Match:  dscp af31 (26)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps

        aggregate-forwarded 0 bytes

    class-map: cs3 (match-all)
      Match:  dscp cs3 (24)
     trust dscp
      Earl in slot 8 :
        385685 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 385685 bytes

    class-map: af21 (match-all)
      Match:  dscp af21 (18)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: cs2 (match-all)
      Match:  dscp cs2 (16)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: af11 (match-all)
      Match:  dscp af11 (10)
     trust dscp
      Earl in slot 8 :
        3106837771790 bytes
        5 minute offered rate 2445091068 bps
        aggregate-forwarded 3106837771790 bytes

    class-map: cs1 (match-all)
      Match:  dscp cs1 (8)
     trust dscp
      Earl in slot 8 :
        0 bytes
        5 minute offered rate 0 bps
        aggregate-forwarded 0 bytes

    class-map: class-default (match-any)

      Match: any
     trust dscp
      Earl in slot 8 :
        303959794294 bytes
        5 minute offered rate 24403696 bps
        aggregate-forwarded 303959794294 bytes