If there are 4 systems installed SAP, how should I connect all of them in one network so that I can administrate the 4 systems with one among them as main server.

This should help you:

After installing an R/3 System, you can use transaction RZ20 to monitor the system. To monitor all systems of your system landscape centrally from one system, first customize the alert monitor by choosing Tools > CCMS > Configuration > Alert monitor or calling transaction RZ21.

Then, to specify the remote systems by System ID and RFC destination (which must have been created beforehand), choose Technical infrastructure > Create remote monitoring entry. 

Next, to change your monitor definitions (you can only change your own monitors),  choose Tools > CCMS > Control/Monitoring > Alert monitor or call transaction RZ20.

Activate the maintenance function by choosing Extras > Activate maintenance function.
Then, double click on the monitor and choose Monitoring change. 
Parameter R3system defines which systems can be monitored by an alert monitor. Change parameter R3system from <CURRENT> (only the current R/3 System can be monitored) to <ALL> (all R/3 Systems defined in RZ21 can be monitored).  Save the changes.

It will help you monitor & use spome other activities centrally.

SAP Basis Tips by : Jaswant Purba

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