Free Updated Cisco 300-610 Actual Exam Questions - Question 8 Discussion
Nexus 7700 Series Switch that is configured with dual supervisors. The feature must meet these
requirements:
• Network resilience must be ensured.
• Network instability for Layer 3 external routing protocols must be reduced.
• Neighbors must be notified when the control plane is restarting.
• Traffic must still be forwarded to peers while neighbor relationships arc restarting.
What should be used to meet these requirements?
B/C? NSF definitely keeps traffic flowing during supervisor failovers, meeting the requirement for uninterrupted forwarding. NSR goes a step further by preserving Layer 3 session states and notifying neighbors about control plane restarts, which helps reduce routing protocol instability. Since the question emphasizes both notifying neighbors and maintaining forwarding, combining these two features seems like the most comprehensive approach. D (BFD) is more about fast failure detection, and A (graceful restart) alone doesn't handle forwarding during supervisor restarts. So, NSF and NSR together
A/B? NSF definitely handles forwarding during failovers, but graceful restart is needed to notify neighbors about control plane restarts. Together they cover all points, so maybe the question expects both concepts combined.
Option B also fits well because NSF (Nonstop Forwarding) allows the switch to keep forwarding traffic during a supervisor failover, minimizing disruptions. It works hand in hand with graceful restart to notify neighbors and reduce routing instability. While NSR maintains session states, NSF focuses on keeping the data plane active, which is crucial here. Given the need for traffic to keep flowing and neighbors to be informed during control plane restarts, NSF provides a solid solution that meets all the requirements together with routing protocol features.
It’s a bit unclear if the question is asking specifically about Layer 3 protocols or overall control plane redundancy. BFD (D) is more for fast failure detection but doesn’t handle stateful restart. NSF (B) and NSR (C) both aim to reduce routing instability during supervisor switchover, but NSF depends on the neighbor supporting graceful restart, whereas NSR maintains session states. The part about notifying neighbors during control plane restart sounds like graceful restart (A), but it alone doesn’t ensure traffic forwarding during the restart. Could the question be assuming specific routing