A DB2 Connect™ Server is used to provide a single point of connectivity to numerous workstations supporting a variety of applications.
Figure 1 illustrates IBM's solution for environments in which you want a DB2® client to make an indirect connection to an IBM mainframe database server through a DB2 Connect server product, such as DB2 Connect Enterprise Edition.
If a TCP/IP connection to the DB2 Connect server is lost, the client will automatically attempt to reestablish the connection. The client will first attempt to reestablish the connection to the original server. If the connection is not reestablished, the client will failover to an alternate DB2 Connect server. (The alternate server is specified on the server instance and its location is returned to the client during the connection.) If the connection to the alternate server is not reestablished, the client will attempt to reestablish the connection to the original server. The client will continue the attempts to reestablish the connection, switching between the original server and the alternate server, until the connection is established or the number of attempts time out.