You can use QoS when multiple SteelHeads are optimizing traffic for the same WAN link. In these cases, you must configure the QoS settings so that the SteelHeads share the available WAN bandwidth. For example, if traffic is to be load-balanced evenly across two SteelHeads, then the maximum WAN bandwidth configured for each SteelHead is one-half of the total available WAN bandwidth. This scenario is often found in multiple SteelHead data protection deployments.

For information about data protection deployments, see Designing for Scalability and High Availability.