ECN probabilistic marking with PFC induced congestion #15909
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sreejithsreekumaran
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Description of PR Summary: Fixes # (issue) Approach What is the motivation for this PR? Add IXIA based test case to demonstrate ECN marking. The test will inject XOFF frame(s) to congest a queue that results in ECN marking. How did you do it? Using Snappi infra How did you verify/test it? setup continous traffic at 99.98% line rate with 1350B packets Test sends a single XOFF frame to the egress port to create congestion in the queue3. A pfc frame is sent with quanta set to values between 500 and 65000, one at a time - read the base ECN counter using serviceability CLI inject XOFF- read the ECN counters At the end of the iteration, once the data is collected, ensure that for each case, with increase in quanta, the marked count at index (n+1) is >= count observed with collection at index (n). Further if the marked count at index (n) > 0, verify that once marking happens, the marking probability increases with an increase in queue occupancy caused by increase in quanta co-authorized by: [email protected]
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Cherry-pick PR to 202405: #16194 |
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Description of PR
Summary:
Fixes # (issue)
Type of change
Back port request
Approach
What is the motivation for this PR?
Add IXIA based test case to demonstrate ECN marking. The test will inject XOFF frame(s) to congest a queue that results in ECN marking.
How did you do it?
Using Snappi infra
How did you verify/test it?
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation