If Cisco DNA Center loses connectivity to devices in an SD-Access fabric, which two outcomes occur?

User connectivity is unaffected because the SD-Access fabric, including the control plane (based on LISP) and data plane (based on VXLAN), operates independently of Cisco DNA Center once it has been provisioned. The fabric devices continue to forward traffic and enforce policies as configured. Cisco DNA Center is primarily a management, automation, and assurance platform. Cisco DNA Center is unable to collect monitoring data in Assurance because Assurance relies on Cisco DNA Center's ability to communicate with fabric devices to gather telemetry, performance metrics, and event logs. Without this connectivity, Cisco DNA Center cannot update its monitoring dashboards or provide insights into network health. Users do not lose connectivity, and devices do not reload, as the fabric's operational state is not dependent on continuous DNA Center connectivity for basic forwarding. New users can still connect as long as the underlying authentication and authorization services (e.g., Cisco ISE) remain reachable and functional.