A New Strategy for “Constrained Bandwidth or External Encryption Mechanisms” Introduction SD-WAN Tunnel encapsulation and encryption has more noticeable overhead on networks that are bandwidth constrained or on ones that utilize external encryption methods. In the scenario of severely bandwidth constrained networks, every byte transmitted is a precious resource since there is a limited number of bytes that can be transmitted at any given moment. Adding additional overhead to an application flow reduces the number of application bytes that can be allocated to the transmission of user data. In the case of external encryption methods, the encryption and encapsulation by SD-WAN adds extra layers of encryption and encapsulation that may not be needed.

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