Which Cisco SD-WAN traffic forwarding option will allow traffic to be load-balanced according to WAN circuit bandwidth?

The active/active weighted traffic forwarding option in Cisco SD-WAN is designed to optimize how traffic is distributed across multiple WAN circuits based on their respective bandwidth. This method allows you to assign 'weights' to different WAN circuits. A circuit with a higher bandwidth can be given a higher weight, meaning it will receive a greater proportion of the traffic.

In active/active scenarios, where multiple WAN connections are functioning simultaneously, configuring weighted load balancing enables an efficient distribution of traffic. This is particularly beneficial for maximizing the utilization of available bandwidth and improving overall performance. When configured properly, this option ensures that data flows are proportionately balanced, thereby enhancing network efficiency and responsiveness.

In contrast, other options do not facilitate bandwidth-based load-balancing. For instance, the active/active mode without weights distributes traffic equally, potentially underutilizing higher-capacity links. Active/passive does not actively balance the load at all since one link remains as a backup until the primary fails. Static routing typically directs traffic along a pre-defined path without consideration for the bandwidth of the circuits involved. Thus, active/active weighted routing stands out as the choice that effectively utilizes circuit capacities for load balancing.