What happens when the primary WAN's bandwidth threshold is exceeded in Spillover Failover/Load-balance?

When the primary WAN's bandwidth threshold is exceeded in a Spillover Failover/Load-balance scenario, traffic is allocated to an alternate WAN in a round-robin manner. This method is designed to optimize the use of available network resources by distributing traffic evenly across multiple WAN connections.

By implementing this approach, organizations can ensure that no single WAN connection becomes a bottleneck, which helps maintain performance and reliability in network communication. The use of a round-robin technique allows for a balanced load across various WANs, improving service availability and reducing the likelihood of traffic congestion.

The other options do not correctly describe the functionality in this context. For instance, simply dropping traffic would not be a viable solution, as it could lead to disruptions in service. Routing all new traffic to the main WAN fails to leverage the load-balancing benefits, and redirecting all traffic to a secondary server would not address the primary WAN's bandwidth usage effectively. The optimal approach in a properly functioning Spillover Failover/Load-balance setup is indeed the allocation of traffic to alternate WANs in a round-robin fashion.