Before SD-WAN Network Influence After SD-WAN Users can still configure SD-WAN solutions with backup networks that are nominally unused, however the use of some of these secondary networks may carry higher operational expense than others. Some SD-WAN edge devices come with built in LTE capabilities for built in resiliency or you may choose to have additional circuits intended for network resiliency with a lower monthly fee but high usage rate. Therefore, for better cost control, a return to the primary network should be made as soon as feasible. 9 Copyright © 2019 AVANT Communications, Inc.