CCNP Software-Defined Wide Area Network (SD-WAN) Practice Exam

In vManage, traffic engineering is driven by two policy families: Data Policy and Control Policy. The control policy governs how the overlay routes are learned and chosen—affecting the path selection itself by defining metrics, criteria, and preferences that influence which WAN path a given flow will use. The data policy governs how traffic is treated on the chosen path—classifying applications, applying QoS markings, shaping or policing, and ensuring the appropriate bandwidth or priority is allocated on that path. Together, these two policy types let you steer traffic across multiple WAN links and ensure both the path selection and the per-application treatment align with performance goals.