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Github Action edited this page Jun 10, 2024 · 1 revision

DP-1.8: Two strict priority queue traffic test

Summary

Verify that DUT drops AF3, AF2, AF1, BE1 and BE0 before AF4 before NC1.

QoS traffic test setup:

  • Topology:

    • 2 input interfaces and 1 output interface with the same port speed. The interface can be a physical interface or LACP bundle interface with the same aggregated speed.
      ATE port 1
      |
     DUT--------ATE port 3
      |
  ATE port 2

  • Traffic classes:

    • We will use 7 traffic classes NC1, AF4, AF3, AF2, AF1, BE1 and BE0.

  • Traffic types:

    • All the traffic tests apply to both IPv4 and IPv6 traffic.

  • Queue types:

    • NC1 will have strict priority queues
      • AF4/AF3/AF2/AF1/BE1/BE0 will use WRR queues.
    • NC1 and AF4 will have strict priority queues with NC1 having higher priority.
      • AF3, AF2, AF1, BE1 and BE0 will use WRR queues.

  • Test results should be independent of the location of interfaces. For example, 2 input interfaces and output interface could be located on

    • Same ASIC-based forwarding engine
    • Different ASIC-based forwarding engine on same line card
    • Different ASIC-based forwarding engine on different line cards

  • Test results should be the same for port speeds 100G and 400G.

  • Counters should be also verified for each test case:

    • /qos/interfaces/interface/output/queues/queue/state/transmit-pkts
    • /qos/interfaces/interface/output/queues/queue/state/dropped-pkts
    • transmit-pkts should be equal to the number of Rx pkts on Ixia port
    • dropped-pkts should be equal to diff between the number of Tx and the number Rx pkts on Ixia ports

  • Latency:

    • Should be < 100000ns

Procedure

  • Connect DUT port-1 to ATE port-1, DUT port-2 to ATE port-2 and DUT port-3 to ATE port-3.

  • Configuration

    • Configure strict priority queues for NC1 and AF4 with NC1 having higher priority.
    • Configure WRR for AF3, AF2, AF1, BE1 and BE0 with weight 12, 8, 4, 2 and 1 respectively.

  • NC1 vs AF4 Strict priority traffic test

    • Non-oversubscription traffic test case
    Traffic class Interface1(line rate %) Interface2(line rate %) Rx from interface1(%) Rx from interface2(%)
    NC1 0.1 0.7 100 100
    AF4 45.1 54.1 100 100
    • Oversubscription traffic test case
    Traffic class Interface1(line rate %) Interface2(line rate %) Rx from interface1(%) Rx from interface2(%)
    NC1 0.1 0.7 100 100
    AF4 99.9 99.3 49.8 49.8

  • Repeat the above 2 test cases between traffic classes:

    • NC1 vs AF3
    • NC1 vs AF2
    • NC1 vs AF1
    • NC1 vs BE1
    • NC1 vs BE0

  • Strict priority vs WRR traffic test

    • Starvation traffic test case
    Traffic class Interface1(line rate %) Interface2(line rate %) Rx from interface1(%) Rx from interface2(%)
    AF4 50 50 100 100
    AF3 50 50 0 0
    • Oversubscription traffic test case
    Traffic class Interface1(line rate %) Interface2(line rate %) Rx from interface1(%) Rx from interface2(%)
    AF4 20 30 100 100
    AF3 60 40 50 50

  • Repeat the above 2 test cases between traffic classes:

    • AF4 vs AF2
    • AF4 vs AF1
    • AF4 vs BE1
    • AF4 vs BE0

Config parameter coverage

  • Classifiers

    • /qos/classifiers/classifier/config/name
    • /qos/classifiers/classifier/config/type
    • /qos/classifiers/classifier/terms/term/actions/config/target-group
    • /qos/classifiers/classifier/terms/term/conditions/ipv4/config/dscp-set
    • qos/classifiers/classifier/terms/term/conditions/ipv6/config/dscp-set
    • /qos/classifiers/classifier/terms/term/config/id

  • Forwarding Groups

    • /qos/forwarding-groups/forwarding-group/config/name
    • /qos/forwarding-groups/forwarding-group/config/output-queue

  • Queue

    • /qos/queues/queue/config/name

  • Interfaces

    • /qos/interfaces/interface/input/classifiers/classifier/config/name
    • /qos/interfaces/interface/output/queues/queue/config/name
    • /qos/interfaces/interface/output/scheduler-policy/config/name

  • Scheduler policy

    • /qos/scheduler-policies/scheduler-policy/config/name
    • /qos/scheduler-policies/scheduler -policy/schedulers/scheduler/config/priority
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/config/sequence
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/config/type
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/inputs/input/config/id
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/inputs/input/config/input-type
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/inputs/input/config/queue
    • /qos/scheduler-policies/scheduler-policy/schedulers/scheduler/inputs/input/config/weight

Telemetry parameter coverage

  • /qos/interfaces/interface/output/queues/queue/state/transmit-pkts
  • /qos/interfaces/interface/output/queues/queue/state/transmit-octets
  • /qos/interfaces/interface/output/queues/queue/state/dropped-pkts
  • /qos/interfaces/interface/output/queues/queue/state/dropped-octets
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