Each instance of an SAP System has a gateway. The gateway enables communication between work processes and external programs, as well as communication between work processes from different instances or SAP Systems.
The SAP Gateway is made up of various processes:
· Gateway read process
· Gateway monitor
These processes are described in the following topics.
Earlier gateway releases that support DCAM and SNA have additional gateway work processes (gwwp, gwwp.exe).
Gateway read (gwrd, gwrd.exe) is the main process in the gateway system.
It is started by the application server (dispatcher) and checked by it periodically.
The gateway reader receives and processes all CPI-C requests.
If the executable gwrd program is called without parameters or with the switch -help, the program outputs a description of the possible command parameters, as well as all the patches.
The gateway monitor (gwmon, gwmon.exe) is used to analyze and administer the SAP Gateway.
When you start it, you initially get a list of active CPI-C connections. You can call up all the other monitor functions via a menu.
You can monitor the gateway from the SAP System (transaction SMGW) or from the operating system.
For more information see:
For more information on the gateway architecture see: