Verify QoS ECN feature configuration.

• Connect DUT port-1 to ATE port-1, DUT port-2 to ATE port-2.

• ECN configuration paramentes:

  • This test is verifying DUT ability to accept ECN configuration with vertical buffer utilization cut-off line.\ If buffer is utilized below that cut-off value no packet is ECN CE marked.\ If buffer is utilized at of above that cut-off value all packet are ECN CE marked.

  • ECN profile can be created for different queues. ECN profiles per queue can be applied to the output side of interfaces.

    Test case	min-threshold	max-threshold	enable-ecn	drop	weight	max-drop-probability-percent
    #1	80KB	80KB	true	false	not set	100
    [TODO]#2	3.125MB	6.250MB*	true	false	not set	100
    [TODO]#3	1%	2%	true	false	not set	100

  • 6.25MB max-treshhold is selected as it represents ~500 mico-seconds of Delay bandwidth Buffer on 100GE interfaces. What is O(2%) of buffer depth, hence allows for micro-burst absorbtion without beackpressing senders and at same time leaves enough DBB for accomodate RTT ECN signaling loop delay in global network for longer burst/congestion.

• Procedure

  • Test Case #1 80KB min-threshold equal max-threshold
    • Configute queue-management-profile w/ ECN paramenters as above. Attach to queue on DUT-Port1.
    • Validate that the following values are set as expected using OC telemetry.
      • min-threshold
      • max-threshold
      • min-threshold = max-threshold (vertical cut-off line)
      • enable-ecn
      • drop
      • max-drop-probability-percent
    • Validate ECN profile can be applied under output interface queue using OC telemetry.
  • [TODO]Test Case #2 Treshold in MB, min-threshold not-equal max-threshold
    • Configute queue-management-profile w/ ECN paramenters as above. Attach to queue on DUT-Port1.
    • Validate that the following values are set as expected using OC telemetry.
      • min-threshold
      • max-threshold
      • enable-ecn
      • drop
      • max-drop-probability-percent
    • Validate ECN profile can be applied under output interface queue using OC telemetry.
  • [TODO]Test Case #3 Treshold in percentage, min-threshold not-equal max-threshold
    • Configute queue-management-profile w/ ECN paramenters as above. Attach to queue on DUT-Port1.
    • Validate that the following values are set as expected using OC telemetry.
      • min-threshold-percent
      • max-threshold-percent
      • enable-ecn
      • drop
      • max-drop-probability-percent
    • Validate ECN profile can be applied under output interface queue using OC telemetry.

• ECN

  • [TODO] qos/queue-management-profiles/queue-management-profile/wred/uniform/config/min-threshold-percent
  • [TODO] qos/queue-management-profiles/queue-management-profile/wred/uniform/config/max-threshold-percent
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/min-threshold
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/max-threshold
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/enable-ecn
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/weight
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/drop
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/config/max-drop-probability-percent

• Interfaces

  • /qos/interfaces/interface/input/classifiers/classifier/config/name
  • /qos/interfaces/interface/output/queues/queue/config/name
  • /qos/interfaces/interface/output/queues/queue/config/queue-management-profile

• ECN

  • [TODO] qos/queue-management-profiles/queue-management-profile/wred/uniform/state/min-threshold-percent
  • [TODO] qos/queue-management-profiles/queue-management-profile/wred/uniform/state/max-threshold-percent
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/min-threshold
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/max-threshold
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/enable-ecn
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/weight
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/drop
  • qos/queue-management-profiles/queue-management-profile/wred/uniform/state/max-drop-probability-percent

• Interfaces

  • /qos/interfaces/interface/input/classifiers/classifier/state/name
  • /qos/interfaces/interface/output/queues/queue/state/name
  • /qos/interfaces/interface/output/queues/queue/state/queue-management-profile

• vRX