TCP/IP network override support provides a mechanism to override z/TPF client connectivity to remote systems. You can override the remote hostname or IP address (and port) that the z/TPF client is connecting to.
Previously, when you copied a production system to act as a test system, you had to reconfigure your z/TPF client middleware such as the high-speed connector, IBM MQ, and user applications, so that the test version of the system did not try to access remote production servers. With this support, you can apply overrides for the remote production hostnames and IP addresses so that the test system application and middleware can connect to the expected location without changing the production configuration on the test system. This support also can be used in the shared test system and VPARS type environments, where individual VPARS systems can apply overrides to change target destinations rather than change the base configuration. The network overrides that are defined do not affect performance and also can be used in production to override hostnames or destination IP addresses, if needed.
You can use the ZTTCP OVERRIDE command to define, delete, and display your TCP/IP network overrides. The NSLOOKUP, TRACERTE, and PING parameters on the ZDTCP command were updated to indicate when an override was applied.
For more information about APAR PJ46729, see the APEDIT.