In releases before IBM® Integration Bus Version 10.0.0.2, the only supported transport mechanism to communicate with WebSphere eXtreme Scale external grids was Object Request Broker (ORB). In IBM Integration Bus Version 10.0.0.2 and later, both ORB and IBM eXtremeIO (XIO) transport mechanisms are supported. You do not need to configure integration nodes to enable or select a transport mechanism; the transport mechanism that is used is determined by the WebSphere eXtreme Scale external grid.