In the non-transparent network use-case the Server provides different Endpoints for the different network paths. This requires both the Server and the Client to support multiple network connections. In this case the Client is responsible for selecting the Endpoint and for Failover. For Failover the normal reconnect scenario described in 6.7 can be used. Only the SecureChannel is created with another Endpoint. Sessions and Subscriptions can be reused. Non-transparent network Redundancy is illustrated in Figure 35.
Figure 35 – Non-transparent network Redundancy
The information about the different network paths is specified in NonTransparentRedundancyType ObjectType defined in OPC 10000-5.