In a subplexing environment, each Advisor and Agent must use a TCP/IP stack that is in its associated subplex. That stack should specify the TCP/IP subplex group ID that corresponds to the TCP/IP part (tt) of the sysplex_group_name (EZBTvvtt) for which the Advisor or Agent has been configured. The DVIPA for the Advisor must be defined in all the stacks that are associated with the subplex, where a restart of the Advisor can occur.