In reply to Alix.

@Alix, the Cisco SDWAN solution uses Cloud-based Orchestrator (vManage) and Controller (vSmart). These are spun up and managed by Cisco. These essentially control the routing infrastructure both Physical (ISR/ASR/vEdge) or Virtual/Cloud.

Once you have the controllers in place, upgrading the IOS on the ISR/ASR is the only thing needed for them to work in an SDWAN mode