After a redundant route processor fails, which feature allows a neighbor to forward packets using the device's most recent forwarding tables?

Non-Stop Forwarding (NSF) allows a routing device to continue forwarding data packets even if its primary route processor (RP) fails and a redundant RP takes over. The key is that the forwarding plane (line cards/data plane) continues to use the last known forwarding information (FIB/CEF tables) while the new RP re-establishes routing protocols and rebuilds the routing information base (RIB/control plane). This minimizes traffic disruption. BFD (Bidirectional Forwarding Detection) is used for fast fault detection in the forwarding path, not for maintaining forwarding during RP failover. RP failover is a general term for the process but doesn't specifically describe the forwarding aspect during the transition. RPVST+ (Rapid Per-VLAN Spanning Tree Plus) is a Layer 2 protocol for preventing loops in switched networks.