A customer uses OSPF and BGP in their network. Which solution will continue forwarding packets during a temporary failure of a P node?

MPLS TE Fast Reroute uses pre-signaled bypass tunnels with node-protection capability, allowing headend routers to detect a P node failure via RSVP hello messages and immediately switch traffic to the pre-computed backup path. This provides sub-50ms failover, maintaining continuous packet forwarding long before OSPF or BGP reconverges.

BGP Flowspec distributes traffic filtering and steering policies via BGP UPDATE messages and is designed for DDoS mitigation and traffic policy - it does not provide pre-computed alternate paths to maintain forwarding through a failed P node.

NSF/GR for OSPF preserves forwarding entries on a single device during a control plane restart or supervisor switchover, but it cannot maintain forwarding when a completely separate physical P node fails and is removed from the topology.

Replacing OSPF with IS-IS changes only the routing protocol and does not add any fast-reroute or pre-computed backup path capability - both protocols have similar reconvergence times without additional TE mechanisms.