Transport Bridge to Isolate Spokes

Transport bridges can connect partner enterprises that must cooperate, and yet remain separate.

The following diagram shows a central control hub for the main enterprise, with spokes to partner enterprises. Although each partner enterprise must share data with the main hub, the partners must not share data with one another.

This use case is interesting in two respects:

• It is an example of a complex bridge topology (see Hub-and-Spoke Bridges).
• It uses transport sets to isolate data. The hub transport bridge (left) configures the RDMA hub transport in one transport set, and collects all the spoke transports in a second transport set. This configuration forwards data from the hub bus to all spoke buses, and forwards data from each spoke bus to the hub bus. Meanwhile, this configuration isolates data from the various spoke buses. The hub bridge does not forward from one spoke to another spoke.