Understanding show policy-map interface XX command IOS XE

[Dhaf54134]

Hello community,

Can any one give me explanition for the result of the command bellow :

sh policy-map interface Gi1/1/2
 GigabitEthernet1/1/2

  Service-policy output: QOS

    queue stats for all priority classes:
      Queueing
      priority level 1

      (total drops) 0
      (bytes output) 948607983

    queue stats for all priority classes:
      Queueing
      priority level 2

      (total drops) 0
      (bytes output) 2317624900

    Class-map: VOIP (match-all)
      1937657 packets
      Match:  dscp ef (46)
      Priority: Strict,

      Priority Level: 1
      police:
          rate 20 %
          rate 20000000 bps, burst 625000 bytes
        conformed 572356344 bytes; actions:
          transmit
        exceeded 0 bytes; actions:
          drop
        conformed 210000 bps, exceeded 0000 bps

    Class-map: REAL-TIME-VIDEO-QUEUE (match-all)
      6729925 packets
      Match:  dscp cs4 (32) cs5 (40)
      Priority: Strict,

      Priority Level: 2
      police:
          rate 20 %
          rate 20000000 bps, burst 625000 bytes
        conformed 2317624900 bytes; actions:
          transmit
        exceeded 0 bytes; actions:
          drop
        conformed 0000 bps, exceeded 0000 bps

    Class-map: CONTROL-MGMT-QUEUE (match-all)
      172909 packets
      Match:  dscp cs2 (16) cs3 (24) cs6 (48) cs7 (56)
      Queueing

      (total drops) 0
      (bytes output) 50760539
      bandwidth remaining 5%
      queue-buffers ratio 10

    Class-map: MULTIMEDIA-CONFERENCING-QUEUE (match-all)
      3831037 packets
      Match:  dscp af41 (34) af42 (36) af43 (38)
      Queueing
      queue limit 100 percent
      queue-limit dscp 34 percent 100
      queue-limit dscp 36 percent 90
      queue-limit dscp 38 percent 80
      (total drops) 0
      (bytes output) 0
      bandwidth remaining 10%
      queue-buffers ratio 10

I dont really understand, the meaning of "queue-buffers ratio" and  "conformed" (highlited in the code)

Thanks.

[ngkin2010 · Accepted solution]

Hi,

'Conform' is the QoS term refer to the Traffic Policing - Single-Rate, Two-Color Policer

Spoiler

A single-rate, two-color policer (1R2C) determines whether traffic is above or below a predetermined rate (CIR in bps) and allows you to take action in either instance. The possible actions for any arriving packet are conform (packet counts as traffic falling below the CIR) and exceed (packet counts as traffic exceeding the CIR).

Refer to the command's output, which mean that there were around 2.3G traffic forwarded without hitting your predefined the limited (CIR).

conformed 2317624900 bytes; actions:

'queue-buffers' is the QoS term refer to the Traffic Shaping - Queuing

Spoiler

 A traffic shaper typically delays excess traffic using a buffer, or queueing mechanism, to hold packets and shape the flow when the data rate of the source is higher than expected.

Refer to the command's output, which mean that 10% of buffer is allocated to the traffic fall under this class (CONTROL-MGMT-QUEUE).

    Class-map: CONTROL-MGMT-QUEUE (match-all)
      172909 packets
      Match:  dscp cs2 (16) cs3 (24) cs6 (48) cs7 (56)
      Queueing

      (total drops) 0
      (bytes output) 50760539
      bandwidth remaining 5%
      queue-buffers ratio 10

Read more: https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-policing/19645-policevsshape.html#policingvsshaping