Question 90
Two areas run OSPF with an ABR that applies area-range suppression. Observed: One exception prefix within a summarized block disappears after consolidation. Which acceptance observation best confirms that the proposed change worked?
Explanation
Correct Answer
This acceptance criterion tests the actual fault. The source evidence was One exception prefix within a summarized block disappears after consolidation. The correction addresses an area range was configured to suppress individual destinations too broadly; success requires the exception installs independently while the intended aggregate is retained.
Incorrect Answers
That observation would verify a separate fault involving type-7 to type-5 translation has not been established by an eligible nssa border router. Its symptom is External routes learned by the NSSA ASBR never appear in area 0. For this case the actual issue is an area range was configured to suppress individual destinations too broadly, and the relevant success signal is The exception installs independently while the intended aggregate is retained.
This result is useful in another case with evidence SPF CPU spikes following frequent flaps in a low-value access segment. It does not test recovery from one exception prefix within a summarized block disappears after consolidation. Check instead whether the exception installs independently while the intended aggregate is retained.
It confirms an unrelated service correction: A forwarding inconsistency persists after the OSPF topology converged. The present case reports One exception prefix within a summarized block disappears after consolidation. Its completion test is The exception installs independently while the intended aggregate is retained.