A dynamic VIPA is created when any application binds to a nonexistent, specific IP address falling within a configured VIPARANGE on that stack.
In the case of a stack failure, the same application could be started on another stack and (assuming the new stack also has an appropriate VIPARANGE configured) when the application binds to the same IP address, the dynamic VIPA is created on the second stack. Future client connections to that IP address are routed to the second stack where the application is now running.
However, if the same (or a different) application is started on a second stack and attempts to create the same dynamic VIPA using a bind() while it exists on the first stack, the end result is determined by how the VIPARANGE was configured on the stack where the first bind() occurred.