Which interface does Cisco Catalyst SD-WAN Cloud OnRamp for IaaS use to set up the customer gateway and map the host VPC to a transit VPC in an AWS environment?

GigabitEthernet3 is typically used as a service-side interface for connectivity to other VPCs or internal network segments within the SD-WAN overlay.

GigabitEthernet4 is typically used as a service-side interface for connectivity to other VPCs or internal network segments within the SD-WAN overlay.

GigabitEthernet1 is usually reserved as the dedicated management interface for the cloud vEdge or cEdge device.

In Cisco Catalyst SD-WAN Cloud OnRamp for IaaS deployments within AWS, GigabitEthernet2 is designated as the private interface on the cloud vEdge or cEdge device. This interface is specifically used to establish the IPsec tunnel to the AWS Customer Gateway, facilitating the mapping of the host VPC to a transit VPC for SD-WAN overlay integration.