The agility, simplicity and cloud-friendliness of SD-WAN may seem self-evident, but to win customers over, MSOs also need to convince enterprises accustomed to high reliability that they can meet and exceed those expectations. Five key elements of service assurance in a software-defined environment include automatic discovery of network topology, identification of any loss of availability, SLA management, awareness of business impacts, and automated processes. With sophisticated multi-vendor service assurance tools and turnkey models for entering this market, MSOs have the means to quickly engage and generate real revenue with SD-WAN.