Dynamic VIPA takeover allows a VIPA address to automatically move to a stack where an existing suitable application instance is already active and allows the application to serve the client formerly going to the failed stack. DVIPA for an application server allows an application to create and activate VIPA so that the VIPA moves when the application moves. This means that application instances on a failing node may be distributed among all surviving nodes.

In Figure 1, TCP/IP stack A has failed, but DVIPA 10.10.4.1 is automatically started on another node with the same application environment, which now handles all the failing node's clients.

Figure 1. DVIPA that Automatically Relocates When TCP/IP Stack Fails

z/OS Communications Server: IP Configuration Guide contains a complete description and detailed examples of DVIPA configuration.