QoS -1.2 - DSCP trust classification

feature/experimental/qos/qos_ingress_traffic_classification/ate_tests/dscp_trust_classification_test/README.md

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+# QOS-1.2: DSCP trust classification test
+
+## Summary
+
+Validate DSCP trust based classification test.
+
+## Procedure
+
+*   Configure DUT with ingress and egress routed interfaces.
+*   Configure “DSCP trust” feature on the DUT ingress interface.
+*   Look up and record device default queue classification maps.
+*   One-by-one send flows containing every IPv4 TOS and IPv6 TC value in the classification table.
+*   For every flow sent,
+*   Verify that the flow is placed into correct egress interface queues, with the mapping matching to the device's classification map.
+*   Verify that the DUT does not change traffic marking.
+*   Verify that no traffic drops in all flows
+
+## Config Parameter coverage
+
+*   /openconfig-qos:qos/classifiers/classifier/terms/term/conditions/ipv4/config/dscp
+*   /openconfig-qos:qos/classifiers/classifier/terms/term/conditions/ipv4/config/dscp-set
+*   /openconfig-qos:qos/classifiers/classifier/terms/term/conditions/ipv6/config/dscp
+*   /openconfig-qos:qos/classifiers/classifier/terms/term/conditions/ipv6/config/dscp-set
+*   /openconfig-qos:qos/classifiers/classifier/terms/term/actions/config/target-group
+*   /openconfig-qos:qos/interfaces/interface/input/classifiers/classifier/config
+*   /openconfig-qos:qos/interfaces/interface/input/classifiers/classifier/config/name
+
+## Telemetry Parameter coverage
+
+*   /openconfig-qos:qos/interfaces/interface/input/virtual-output-queues/voq-interface/queues/queue/state/name
+*   /openconfig-qos:qos/interfaces/interface/input/virtual-output-queues/voq-interface/queues/queue/state/transmit-pkts
+*   /openconfig-qos:qos/interfaces/interface/input/virtual-output-queues/voq-interface/queues/queue/state/dropped-pkts
+
+*   QoS Classification
+
+    *  Classification table
+
+    IPv4 TOS      |       IPv6 TC           |    Forwarding class
+    ------------- | ----------------------- |  ---------------------
+    0             |      0-7                |         be1
+    1             |      8-15               |         af1
+    2             |      16-23              |         af2
+    3             |      24-31              |         af3
+    4,5           |      32-47              |         af4
+    6,7           |      48-63              |         nc1