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Palo Alto takes a next-generation application-defined holistic approach at looking at application traffic that goes above layer 3 and into layer 7 for troubleshooting application performance issues. Prisma IONs perform stateful inspection and application-based (layer 7) firewalling with east-west segmentation and inspection. The solution is flow and session-based which allows Prisma to utilize a novel approach to steering wan traffic by looking at the transactional success and failure statistics. Factors that are built into the structure which influence the traffic path selection and engineering include TCP initiation, server response times, MOS scores for real-time traffic, and other layer 7 elements. This allows the device to perform automated asymmetric flow correction on the underlay and overlay. Path-correction also comes in the form of measured metrics such as loss, latency, and jitter as well as application performance within the session flows. If an application starts seeing retransmissions for example, the path can be auto corrected for that application alone even on the underlay. Meaning that even tunnels that are not bookended to SSE’s (Security Services Edge providers) such as Prisma Access can be measured for performance and path corrected based upon the number of transaction failures the current path has versus the number of transaction successes. Prisma SDWAN also utilizes auto correction for asymmetrical routing and requires no extensive or complex filtration on routing. This is due to the unique approach of using core and edge BGP routing and auto route-maps to influence the traffic to the correct path. Traffic steering can be performed with their app-id and policy control brought over from CloudGenix. The newest code release brings in the extensive app-ids from Panorama which will help unify the products.