When you perform a discovery operation you import the discovered system information into a CICS® DA Project. The system information contained in the project is known as the system model.
Discovery and host names:
When discovery runs on an MVS™ image, the names of the TCPIP stacks are queried to obtain the primary IP address of those stacks. The USS 'host' service is used to query the domain name server and resolve the IP address to a name. If a name is returned, this name is passed to the CICS DA client. If no name is returned, then the IP address will be passed to the CICS DA client.
As this part of the discovery process runs on the MVS image, it might be that the name for the primary IP address is a locally administered one that is not visible to the client. If that is the case, then the client might need to have its TCPIP configuration altered, for example, by altering the client hosts file, to allow the CICS DA discovery phase to complete. If the discovered IP address does not resolve to a name on the server, and the discovered IP address is not reachable to the client workstation, then the discovery process will not complete successfully.
The first thing the discovery program does is to identify all the MVS systems in the sysplex. You then select the MVS images on which to perform the next stage of the discovery process. The discovery program then looks at the regions that are running on each selected MVS image and identifies supported releases of CICS, and other running instances, such as CICSPlex® SM CMASes, Web User Interface servers, DB2® servers, WebSphere® MQ servers, CICS temporary storage servers, CFDT servers and NC servers.
This task creates a CICS DA project, performs a discovery operation, and imports the systems information into the model. You must have a CICS DA connection defined.
The model is created and is shown in the DA Projects view. For details of the DA Projects view, see the topic DA Projects view.