Location based control plane signaling and proactive transport switching for sdwan

A method comprising:

• receiving from a controller a policy based on knowledge of a route of a mobile client device, the policy specifying a transition to cellular base stations within a policy area to provide connectivity for the mobile client device based on its position along the route;
• determining an entrance into the policy area at a first location defined by the policy received;
• transmitting a request to the controller, the request including an indication of the entrance into the policy area, the indication triggering the controller to increase a buffer and trigger a timer for a predetermined time period;
• monitoring for a prompt from the controller upon expiry of the timer, the prompt including a trigger to continue normal operation based on a prediction by the controller that the mobile client device has reached a second location indicating an exit from the policy area;
• and
• in response to a delay in receiving the prompt to continue the normal operation, avoid entering a graceful recovery (GR) mode until the prompt is received from the controller.

A non-transitory computer-readable medium comprising computer-readable instructions, which when executed by one or more processors of a network appliance, cause the network appliance to:

• receiving, at a controller, a policy based on knowledge of a route of a mobile client device;
• transmitting, by the controller, the policy to the mobile client device, the policy specifying a transition to cellular base stations within a policy area to provide connectivity for the mobile client device based on its position along the route;
• receiving, from the mobile client device, an indication that the mobile client device has entered the policy area defined by the policy;
• in response to receiving a request from the mobile client device, increasing a buffer upon the mobile client device entering the policy area;
• prompting the mobile client device to continue normal operation after the mobile client device is predicted to exit the policy area;
• and
• entering a graceful recovery (GR) mode upon determining the normal operation is not detected.