How to Configure & Test RFC Connection in SAP - SM59

Details

Last Updated: 08 January 2021

Click the  'CREATE' button. In the next screen , Enter -

• RFC Destination – Name of Destination (could be Target System ID or anything relevant)
• Connection Type – here we choose one of the types (as explained previously) of RFC connections as per requirements.
• Description – This is a short informative description, probably to explain the purpose of connection.

After you'SAVE'the connection, the system will take you to 'Technical Settings' tab, where we provide the following information:

• Target Host– Here we provide the complete hostname or IP address of the target system.
• System Number – This is the system number of the target SAP system.
• Click Save

In the 'Logon and Security'  Tab, Enter Target System information

• Language – As per the target system's language

• Client – In SAP we never logon to a system, there has to be a particular client always, therefore we need to specify client number here for correct execution.

• User ID and Password – preferably not to be your own login ID, there should be some generic ID so that the connection should not be affected by constantly changing end-user IDs or passwords. Mostly, a user of type 'System' or 'Communication' is used here. Please note that this is the User ID for the target system and not the source system where we are creating this connection.

Click Save. RFC connection is ready for use
Note: By default, a connection is defined as aRFC. To define a connection as tRFC or qRFC go to Menu Bar -> Destination aRFC options / tRFC options ; provide inputs as per requirements. To define qRFC, use the special options tab.

Step 2: Trusted RFC connection

There is an option to make the RFC connection as 'Trusted'. Once selected, the calling (trusted) system doesn't require a password to connect with target (trusting) system. Following are the advantages for using trusted channels:

• Cross-system Single-Sign-On facility
• Password does not need to be sent across the network
• Timeout mechanism for the logon data prevents misuse.
• Prevents the mishandling of logon data because of the time-out mechanism.
• User-specific logon details of the calling/trusted system is checked.

The RFC users must have the required authorizations in the trusting system (authorization object S_RFCACL).Trusted connections are mostly used to connect SAP Solution Manager Systems with other SAP systems (satellites)

Step 3: Testing the RFC Connection

After the RFCs are created (or sometimes in the case of already existing RFCs) we need to test, whether the connection is established successfully or not.
  As shown above we go to SM59 to choose the RFC connection to be tested and then we expand drop down menu - "Utilities->Test->…". We have three options:

Connection test -> This attempts to make a connection with the remote system and hence validates IP address / Hostname and other connection details. If both systems are not able to connect, it throws an error. On success, it displays the table with response times. This test is just to check if the calling system can reach the remote system.
 

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