Current Software Defined Wide Area Network (SDWAN) solutions typically utilize a Service Level Agreement (SLA) definition in conjunction with policy to match and classify traffic types in order to direct traffic over SDWAN tunnels. An SLA definition can include values of loss, latency, and jitter, which are measured via a Bi-directional Forwarding Detection (BFD) channel that exists between two Transport Locators (TLOCs). These values collectively represent the liveliness of a network including the status of the BFD link. In current implementations, BFD control messages are sent with a high priority Differentiated Services Code Point (DSCP) marking, such as '48'. SLA metrics based on such a high priority packet, however, do not reflect the priority that it will be received by the actual data that flows through an edge device. Techniques presented herein address such issues by providing for a more accurate representation or measurements of loss, latency, and jitter for various desired traffic profiles for a network along with capabilities to use such measurements to direct different traffic types to correct tunnels.
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Yeruva, Sireesha; Das, Satyajit; Govindan, Nirmal; Vempaty, Sai Swarna Latha; and Patil, Priyanka Chidambar, "MEASURING LOSS, LATENCY AND JITTER BASED ON APPLICATION TYPES TO IMPROVE APPLICATION ROUTING DECISIONS", Technical Disclosure Commons, (November 29, 2020)