350-601 · Question #457
350-601 Question #457: Real Exam Question with Answer & Explanation
The correct answer is B: The LACP peer session remains up.. {"question_number": 3, "correct_answer": "B", "explanation": "Cisco Nexus 9000 ISSU (In-Service Software Upgrade) is specifically designed to be hitless - the upgrade proceeds without disrupting active data-plane sessions. During an ISSU, the switch preserves LACP state informati
Question
Cisco Nexus 9000 Series Switches are configured with LACP protocol and default aging timers. What is the impact on the LACP peer during an ISSU upgrade?
Options
- AThe LACP peer connection terminates.
- BThe LACP peer session remains up.
- CThe LACP peer renegotiates the adjacency.
- DThe LACP peer connection resets.
Explanation
{"question_number": 3, "correct_answer": "B", "explanation": "Cisco Nexus 9000 ISSU (In-Service Software Upgrade) is specifically designed to be hitless - the upgrade proceeds without disrupting active data-plane sessions. During an ISSU, the switch preserves LACP state information so the LACP peer does not detect any session disruption. With default LACP timers (slow mode: PDUs every 30 seconds, timeout at 90 seconds), the LACP peer would not expire the session before the upgrade completes. The ISSU process restores LACP PDU exchange before the peer timer expires. As a result, the LACP peer session remains up throughout the upgrade with no renegotiation, termination, or reset of the adjacency.", "generated_by": "claude-sonnet", "llm_judge_score": 3}
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