DMVPN and sVTI are both VPN technologies that use IPsec to secure the tunnel traffic. However, they differ in how they establish and manage the tunnels. DMVPN supports dynamic tunnel establishment, which means that the VPN endpoints can create and delete tunnels on demand, based on the routing information. This allows for a scalable and flexible VPN topology, where the endpoints can communicate directly with each other without going through a central hub. sVTI, on the other hand, supports static tunnel establishment, which means that the VPN endpoints have to manually configure the tunnel source and destination addresses. This requires a one-to-one mapping between the endpoints, and limits the VPN topology to a hub-and-spoke model, where the endpoints can only communicate with the hub. Therefore, DMVPN is more suitable for large and dynamic VPN networks, while sVTI is more suitable for small and stable VPN networks. References:
what is difference between svti and DVTI? - Cisco Community
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