What occurs on the NSX Edge node when a stateful service is enabled for the first time on a Tier-0 Gateway?

When a stateful service is enabled for the first time on a Tier-0 Gateway, the system requires both the Primary (Service Router or SR) and the Backup (Disaster Recovery or DR) routers to ensure high availability and redundancy. In this context, the stateful service relies on maintaining session information and connectivity that can failover seamlessly between SR and DR.

The correct choice indicates that when the stateful service is enabled, the Service Router (SR) gets instantiated to manage the active traffic, and at the same time, the Disaster Recovery (DR) router is also automatically instantiated. This auto-connection is crucial for maintaining session persistence and ensuring that if the primary service router encounters issues or goes down, the traffic can failover to the DR without disruption.

The background processes involved in this auto-connection are designed to streamline the deployment of stateful services. It eliminates the need for manual intervention, allowing for immediate redundancy and failover capabilities, which are pivotal for maintaining service continuity in enterprise environments.

This setup is particularly important in scenarios where consistent user experiences and uninterrupted service availability are critical, demonstrating how NSX-T handles resource allocation and redundancy effectively through automatic configurations for stateful services.