Which VPN must be present on at least one interface to install Cisco vManage and integrate it with WAN Edge devices in an overlay network site ID: S0123T4E56F78?

VPN 512 is used for management interfaces like GigabitEthernet0/0/0 but is not the overarching transport VPN required for general control plane communication and device integration across the SD-WAN overlay.

While other VPNs handle service traffic, VPN 0 is specifically mandated for the underlying transport and control plane communication necessary for vManage and WAN Edge integration.

The services VPN range 0-511 is for overlay data plane services; VPN 0 is distinct and dedicated to control plane and management traffic, making it indispensable for fabric operation.

VPN 0 is designated as the transport VPN, carrying all control plane traffic, including OMP, BFD, and device management, which is essential for establishing and maintaining communication between vManage and WAN Edge devices during integration and operation.