In VTAM®, CMIP services is made available by specifying the OSIMGMT=YES start option at each host that is to use CMIP services. Using this start option, you can access VTAM topology agent and CMIP services.

To enable CMIP services and the VTAM topology agent to communicate with a topology manager application program, perform these following steps.

1. Use the estimating storage worksheets in z/OS Communications Server: New Function Summary to determine the total amount of CSA/ECSA storage you need.
2. Create a directory definition file that indicates which remote CMIP services have access to the local CMIP services. You do this by updating the IBM-supplied directory definition file. The IBM-supplied file allows unrestricted access to CMIP services. If you want to control access, you must update the IBM-supplied file.
3. Include the job control statements that load the directory definition file and the other CMIP services data sets in your VTAM start procedure.
4. Start VTAM with the start option OSIMGMT=YES or issue the MODIFY VTAMOPTS command with the OSIMGMT=YES start option to enable CMIP services and to start the VTAM topology agent.
5. Determine whether the default values for the OSITOPO, OSIEVENT, and UPDDELAY start options are acceptable, and code these start options if required. For further information about these start options and keywords, see the z/OS Communications Server: SNA Resource Definition Reference. Selective reporting is also possible for logical lines and switched PUs and their major node through the VTAMTOPO keyword on the resource definitions.
6. Code an APPL definition statement for the application program, if you are writing your own application program.