Is it platform specific

generic

Importance or Severity

Medium

Description of the bug

Currently, in helper.py files in pfc test suite, we have a check:
pkt_drop = get_interface_stats(egress_duthost, dut_tx_port)[egress_duthost.hostname][dut_tx_port]['tx_drp']

This would work fine in case of pizzaboxes but in case of a Voq Chassis the packet drop happens on the ingress side, so need to update these helper files.

Steps to Reproduce

If we run snappi_tests/pfc/m2o_oversubscribe_lossy_helper.py
or anyother m20 test, it will probably fail with an error:

  pytest_assert(abs(drop_percentage - 10) < 1, 'FAIL: Drop packets must be around 10 percent')

E Failed: FAIL: Drop packets must be around 10 percent

Actual Behavior and Expected Behavior

pkt_drop should be calculated on the ingress side in case of a VOQ Chassis.

Relevant log output

Output of show version

Attach files (if any)

No response