How is the Routerlink port created between a Tier-1 Gateway and Tier-0 Gateway?

The Routerlink port between a Tier-1 Gateway and a Tier-0 Gateway is indeed automatically created when a connection between the two is established through the NSX UI. This automatic creation streamlines the setup process by ensuring that the Routerlink port is configured appropriately without requiring manual intervention from the user.

When an administrator connects a Tier-1 Gateway to a Tier-0 Gateway, NSX-T manages the underlying connections, facilitating communication and traffic routing between the two tiers. This automatic setup leverages the inherent orchestration capabilities of NSX-T, which simplifies deployment scenarios and reduces the potential for human error during configuration.

This design is intentional, as the NSX ecosystem aims to provide a more efficient and integrated approach to network topology management, allowing administrators to focus on higher-level network architecture rather than the underlying manual configurations.