Answer-first summary for fast verification
Answer: Ensure that the active pre-shared key matches on both the on-premises and Google edge routers.
The question describes a scenario where a Cloud Interconnect connection is operational but MACsec is operationally down. According to Google Cloud documentation and the community discussion consensus (with D receiving 100% of votes and multiple upvoted comments supporting it), the most likely cause is a mismatch in the active pre-shared keys between the on-premises and Google edge routers. Option D directly addresses this key verification step. Option A is incorrect because MACsec was already successfully enabled. Option B is irrelevant since the connection itself is operational. Option C is less likely as the implementation is recent, making key expiration improbable compared to a configuration mismatch.
Author: LeetQuiz Editorial Team
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You manage a large organization that recently established a 100GB Cloud Interconnect connection between your Google Cloud and your on-premises edge router. During a routine connectivity check, you find the connection is operational, but an error message indicates that MACsec is operationally down. What should you do to resolve this error?
A
Ensure that the Cloud Interconnect connection supports MACsec.
B
Ensure that the on-premises router is not down.
C
Ensure that the active pre-shared key created for MACsec is not expired on both the on-premises and Google edge routers.
D
Ensure that the active pre-shared key matches on both the on-premises and Google edge routers.
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