How is the intra-tier transit link connection created between SR and DR for a Tier-0 Gateway?

The intra-tier transit link connection between the Service Router (SR) and the Distributed Router (DR) for a Tier-0 Gateway is automatically established when the SR is initialized. This mechanism simplifies the process of networking in NSX-T by automatically configuring the necessary connections to facilitate communication between different components of the NSX-T infrastructure.

When the SR initializes, it automatically prepares the connections that allow traffic to flow between the Tier-0 Gateway and any other networks or gateways that may be in use, eliminating the need for manual configuration of transit links. This automation is a core feature designed to enhance operational efficiency and minimize the potential for configuration errors during deployment.

While the other options might suggest alternative methods for creating connections, the principle behind NSX-T's architecture emphasizes automation wherever possible, particularly during the initialization phase. This ensures a more streamlined and less error-prone setup process, allowing administrators to focus on higher-level configurations and network policies rather than low-level connectivity details.