SD-Internet functions control traffic in Underlay (WAN1, WAN2).
Until the SD-Internet feature was introduced, traffic control was focused on Overlay (Auto VPN Tunnel).
This makes it a good companion feature to "Local Internet Breakout".
[Doc]
SD-WAN Internet Policies (SD-Internet) - Cisco Meraki
https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/...
[Requirements]
* SD-Internet requires a Secure SD-WAN Plus license.
* You must make a request to support to activate SD-Internet.
* Supported MX models are limited.
> Supported MX models - MX64, MX65, MX67, MX68, MX75, MX84, MX85, MX95, MX100, MX105, MX250, MX450
> Unsupported MX models - MX50, MX60, MX70, MX80, MX90, MX400, MX600, vMX (all)
* A firmware version (16-X) is required.