Managing Cross-System Command Traffic › Issuing Commands Through Indirect Command Routing › Using ICMF

Using ICMF

To create an indirect route, issue a series of LINK commands that connects a source system to an intermediary system and that connects the intermediary system to the system where the command will be executed. The LINK commands create a series of connections like this:

Source System --> Intermediary System --> Target System

Note the following important considerations:

• If you are using inactive or subsystem consoles as target consoles on the intermediary system, you must specify PRODUCT=GCM on the LINK command you issue from the intermediary system.
• If you are using extended consoles as target consoles on the intermediary system, you must specify CONSOLE=prefix* on the LINK command you issue from the intermediary system (where prefix is the prefix specified on the GCMINIT EXTCON statement in CA MIC for z/OS and * is the wildcard character).
• If you use a mixture of console types for target consoles on the intermediary system, you will need to specify both types of LINK commands.

For example, suppose you are running CA MIC for z/VM on system SYSA and CA MIC for z/OS on two systems, SYSB and SYSC. Also suppose these systems are connected as shown above (with SYSA the source system, SYSB the intermediary system, and SYSC the target system). To create an indirect route between user MAINT on system SYSA and system SYSC, issue this command on system SYSA:

LINK USER=MAINT,SYSID=SYSB,AUTHORITY=INFO

Then, to create the intermediary linkage from system SYSB to system SYSC, issue one of these commands on system SYSB:

LINK PRODUCT=GCM,SYSID=SYSC
LINK CONSOLE=GCM*,SYSID=SYSC  (where GCM is the prefix specified on the GCMINIT
                               EXTCON statement in CA MIC for z/OS).

Commands directed to system SYSC are executed, and the responses routed back to the command source on SYSA through the intermediary system SYSB.

Here is how to issue a z/OS D J,L command from user MAINT on system SYSA and have that command execute on system SYSC (when the command prefix for CA MIM on SYSB is @):

MI SYSB, @SYSC, D J,L

When this command is issued, CA MIM for z/VM on SYSA intercepts it and directs it to system SYSB through the linkage. System SYSB then receives and executes the command @SYSC, D J,L. CA MIM for z/OS then uses the prefix @SYSC to direct this command to system SYSC through the linkage to GCMF (created by specifying PRODUCT=GCM or CONSOLE=GCM). SYSC then receives and executes the command D J,L. CA MIM for z/ OS on SYSC routes the command response back to SYSA through the intermediary system SYSB.