Which term describes when new flows are rerouted to available WAN interfaces upon reaching bandwidth limits?

The term that describes the rerouting of new data flows to available WAN interfaces when bandwidth limits have been reached is known as "Spill-Over." This mechanism enhances network efficiency by allowing traffic to continue flowing without disruption, effectively managing bandwidth constraints by distributing excess traffic to alternative paths.

In the context of network management, spill-over is particularly useful for maintaining performance during peak demand times. When the primary interface hits its bandwidth threshold, new connections or additional load can seamlessly shift to another interface, ensuring that the overall system remains operational and responsive.

While load balancing and traffic shaping also relate to managing network traffic, they function differently. Load balancing typically distributes workloads evenly across multiple interfaces to optimize resource use, not specifically in response to bandwidth limits. Traffic shaping, on the other hand, focuses on controlling the flow of data to conform to specific bandwidth requirements and does not inherently involve rerouting flows once a limit is reached. Failover usually pertains to switching to a backup system in case of primary system failures, rather than managing traffic flow based on bandwidth availability.