Command flow and the L= Operand in a sysplex

If you enter a command from a console on one system and specify L= to affect a console on another system, consider the following:

• The system that issues the command processes the command as follows:
  1. Hardcopy log processing for the system can record the command.
  2. The command processing exits of the system get control of the command.
  3. If exit processing modified the command, hardcopy log processing on the system can record the command.
  4. If any installation exit processed the command, no further command processing occurs.
  5. The subsystems on the system receive the command.
  6. If any subsystem processed the command, no further command processing occurs.
  7. The command processor for the command on the system processes the command.
  8. Sysplex services routes the command to the appropriate system where the target console is attached.
• Any system that receives the command processes it as follows:
  1. Hardcopy log processing for the system can record the command.
  2. The command processor on the system processes the command.

For example, if the operator issues a CONTROL command from CONS1 on SYA to change the display area of CONS2 on SYB, hardcopy log processing occurs for both SYA and SYB. The installation exits of SYA can get control. Subsystems on SYA receive the CONTROL command. The command processor for CONTROL processes the command.

Sysplex services directs the CONTROL command to SYB where SYB logs the command and changes the console display area for CONS2 on SYB. (Only the installation exits on SYA are able to process the command.)