Intra-Tier Transit Link Connection for Tier-0 Gateway

C.

In VMware NSX-T Data Center, a Tier-0 Gateway provides connectivity between the physical and virtual networks. It also provides routing between the logical segments (T1 Gateways) connected to it.

In order to establish communication between the standby and active routers of a Tier-0 Gateway, an intra-tier transit link connection needs to be created between them. This connection is used for forwarding traffic between the two routers, and for keeping the routing tables in sync.

The correct answer to the question is A. Manually create a gateway interface and mark it as transit. This is because the intra-tier transit link connection needs to be manually configured by creating a gateway interface on both the Standby Router (SR) and the Active Router (DR) of the Tier-0 Gateway. This interface is then marked as a transit interface.

Here are the detailed steps to create the intra-tier transit link connection for a Tier-0 Gateway:

1. Log in to the NSX-T Manager using the administrator credentials.
2. Navigate to Networking > Tier-0 Gateways.
3. Select the Tier-0 Gateway for which you want to create the intra-tier transit link connection.
4. Click on the "Interfaces" tab.
5. Click the "+" icon to add a new interface.
6. Select the type of interface as "Gateway."
7. Enter a name for the interface and select the appropriate subnet IP address.
8. Under "Advanced Options," select "Transit" as the interface type.
9. Repeat these steps on both the Standby Router (SR) and the Active Router (DR) of the Tier-0 Gateway.

Once the intra-tier transit link connection is established between the SR and DR, the routing tables are synchronized between the two routers, and they can start forwarding traffic between the logical segments connected to the Tier-0 Gateway.