Enabling Communications Between an On-Premises Data Center and Service VPCs

Step 1: Create Cloud Resources

1. Create one enterprise router for connecting VPCs in the same region.
2. Create VPCs and subnets. In this example, create two service VPCs and one transit VPC.
3. Create an ECS in each service VPC.

Step 2: Create VPC Peering Connections and Configure Routes

1. Create a VPC peering connection between VPC-A and VPC-Transit, and add routes for this VPC peering connection.
2. Create a VPC peering connection between VPC-B and VPC-Transit, and add routes for this VPC peering connection.
3. Verify the connectivity between VPC-A and VPC-B.

Step 3: Create a VPC Attachment to the Enterprise Router

1. Attach the transit VPC to the enterprise router.
2. Add routes in the route table of VPC-Transit with the enterprise router as the next hop and the on-premises CIDR block as the destination.
3. Add a route in the route table of the enterprise router with the VPC attachment as the next hop and the on-premises CIDR block as the destination.

Step 4: Create a Virtual Gateway Attachment to the Enterprise Router

1. Create a Direct Connect connection to connect the on-premises data center to the cloud over a line you lease from a carrier.
2. Create a virtual gateway and attach it to the enterprise router.
3. Create a propagation for the virtual gateway attachment in the route table of the enterprise router to automatically learn the routes of the on-premises data center.
4. Create a virtual interface to associate the virtual gateway with the Direct Connect connection.
5. Configure routes on the router in the on-premises data center.

Step 5: Verify Network Connectivity Between the Service VPCs and On-Premises Data Center

Log in to an ECS and run the ping command to verify the network connectivity.