The information model (list of Objects Variables…) between redundant Servers is always identical. In an MDIS system, the information (actual values) exposed in a redundant set of OPC UA servers may be identical in some cases. MDIS systems typically include arbitration which is described in Section 5.3.2. The arbitration process can result in Servers in which the Servers have an identical instance address space, but it can also result in Servers that do not have identical instance address space.