Two on-premises data centers each connect to a Direct Connect gateway through a dedicated private virtual interface. The first data center's router advertises 110 routes to the Direct Connect gateway via BGP; the second advertises 60 routes. The Direct Connect gateway attaches to a VPC through a virtual private gateway. Resources in the VPC are intermittently unreachable from both data centers. The VPC route table shows that routes from the first data center are not being populated. To fix this in the most operationally efficient way, what should the network engineer do?

The Direct Connect gateway has a limit of 100 routes that can be propagated to a VPC route table. The first data center is advertising 110 routes, exceeding this limit, which prevents any of its routes from being populated. The second data center's 60 routes are within the limit, so they would propagate. Summarizing (aggregating) routes on the on-premises router reduces the total number of advertised routes, bringing them below the 100-route limit and allowing propagation. Deleting the Direct Connect gateway and creating new private VIFs directly to the VGW is not operationally efficient and doesn't address the route limit. Opening a support case for a quota increase is not applicable here, as the 100-route limit for propagation to a VPC route table is a hard limit for Direct Connect gateways. Deploying a Transit Gateway would solve the issue, as Transit Gateway supports up to 20,000 routes, but it's a more complex and costly solution than simply aggregating routes, making it less operationally efficient for this specific problem.