Question 390
A service provider configures hierarchical scheduling for customer traffic. Observed: Subinterfaces together exceed the parent shaping budget during congestion. Which acceptance observation best confirms that the proposed change worked?
Explanation
Correct Answer
This acceptance criterion tests the actual fault. The source evidence was Subinterfaces together exceed the parent shaping budget during congestion. The correction addresses per-customer shapers are configured without enforcing a proper aggregate parent limit; success requires aggregate egress stays within the contracted parent rate and class priorities remain intact.
Incorrect Answers
It confirms an unrelated service correction: Classification does not assign distinct packet-loss priorities for drop behavior. The present case reports Subinterfaces together exceed the parent shaping budget during congestion. Its completion test is Aggregate egress stays within the contracted parent rate and class priorities remain intact.
This result is useful in another case with evidence Application packet loss remains high even with low measured total interface utilization. It does not test recovery from subinterfaces together exceed the parent shaping budget during congestion. Check instead whether aggregate egress stays within the contracted parent rate and class priorities remain intact.
That observation would verify a separate fault involving the wred drop-profile threshold curve or attachment is incorrect. Its symptom is Tail drops occur abruptly rather than the expected early-drop progression. For this case the actual issue is per-customer shapers are configured without enforcing a proper aggregate parent limit, and the relevant success signal is Aggregate egress stays within the contracted parent rate and class priorities remain intact.