Tunnel Concentrator Network Architecture

The Tunnel Concentrator application consists of two distinct internal stacks or layers. Each stack has its own set of IP addresses, interfaces, and routing table. There is no direct network access between the stacks, although they do communicate using an internal API. The two stacks are:

Management layer
Data layer

The following image provides a high-level of the two stacks for a Tunnel Concentrator instance, along with the internal connections and systems that allow Tunnel Concentrator to connect to an external devices, such as an external switch. The data layer can be accessed directly, but access to the management layer is hidden behind an internal NAT reference with access dependent on the underlying Universal Compute Platform routing table.