Set up Logical Systems and RFC Connections 
In order that SAP CRM, SAP APO and SAP ECC can exchange data, you need to specify logical systems and remote function call (RFC) connections for each system.
The following figure shows an example system landscape and the steps necessary to set it up.

Set-up of Logical Systems and RFC Connections
In SAP CRM
Define logical system.
In Customizing choose
Logical System |
Description |
|---|---|
CR7CLNT700 |
CRM System CR7, Client 700 |
Assign client to logical system.
In Customizing choose
Client |
Name |
City |
Crcy |
Changed on |
|---|---|---|---|---|
700 |
Client 700 |
Boston |
USD |
/ |
Double-click on the entry above to fill in the following details:
Section |
Setting |
|---|---|
Changes and transports for client-dependent objects |
Automatic recording of changes |
Client-independent object changes |
Changes to Repository and client-ind. Customizing allowed |
Protection: Client copier and comparison tool |
Protection level 0: No restriction |
Restrictions |
Allows CATT processes to be started |
Define target system for RFC Calls.
In Customizing choose .
Note
In SAPLogon, place the cursor on the relevant system to display relevant information. To display the name of the target host, choose Server. To display the system number, choose Properties
/ |
SAP ECC |
SAP APO |
|---|---|---|
RFC destination |
R38CLNT800 |
AP9CLNT900 |
Connection type |
3 |
3 |
Description |
R/3 Client 800 |
APO Client 900 |
Load distrib. |
No |
No |
Target host |
host-r38.wdf.sap-ag.de |
host-ap9.wdf.sap-ag.de |
System number |
00 |
00 |
Language |
EN |
EN |
Client |
800 |
900 |
User |
CRMATP |
CRMATP |
Password |
******** |
********* |
Set up connection to SAP APO.
Note
A client can support only one SAP APO System. This table is client independent, so if you need to define connections to more than one SAP APO System, you will need to define an entry for each RFC connection.
Define Middleware parameters by choosing .
Select Availability Check using SAP APO and create the following table entry:
Key |
Parameter 1 |
RFC-Destination |
Control Information |
|---|---|---|---|
CRMAPOATP |
CRMAPOATP |
AP9CLNT900 |
X=APO3.0A |
In SAP ECC
Define logical systems.
In Customizing choose .
Logical System |
Description |
|---|---|
R38CLNT800 |
R/3 System R38, Client 800 |
AP9CLNT900 |
APO System AP9, Client 900 |
Assign client to logical system.
In Customizing choose .
Client |
Name |
City |
Logical System |
Crcy |
Changed on |
|---|---|---|---|---|---|
800 |
Test Client |
Boston |
R38CLNT800 |
USD |
/ |
Double-click on the entry above to fill in the following details:
Section |
Setting |
|---|---|
Changes and transports for client-dependent objects |
Automatic recording of changes |
Client-independent object changes |
Changes to Repository and client-ind. Customizing allowed |
Protection: Client copier and comparison tool |
Protection level 0: No restriction |
Restrictions |
Allows CATT processes to be started |
Define target systems for RFC Calls.
In Customizing choose .
/ |
SAP CRM |
SAP APO |
|---|---|---|
RFC destination |
CR7CLNT700 |
AP9CLNT900 |
Connection type |
3 |
3 |
Load distrib. |
No |
No |
Target host |
host-cr7.wdf.sap-ag.de |
host-apo.wdf.sap-ag.de |
System number |
00 |
00 |
Description |
CRM Client 700 |
APO Client 900 |
Language |
EN |
EN |
Client |
700 |
900 |
User |
CRMATP |
CRMATP |
Password |
******** |
********* |
Caution
Test the connection and the remote login before continuing.
In SAP APO
Define logical systems.
In Customizing, choose
Logical System |
Description |
|---|---|
AP9CLNT900 |
APO System AP9, Client 900 |
CR7CLNT700 |
CRM System CR7, Client 700 |
R38CLNT800 |
ECC System R38, Client 800 |
Assign client to logical system.
Assign the SAP APO client to the logical system:
In Customizing choose .
Client |
Name |
City |
Crcy |
Changed on |
|---|---|---|---|---|
900 |
APO Client |
Boston |
USD |
Double-click on the entry above to fill in the following details:
Section |
Setting |
|---|---|
Changes and transports for client-dependent objects |
Changes w/o automatic recording |
Client-independent object changes |
Changes to Repository and client-ind. Customizing allowed |
Protection: Client copier and comparison tool |
Protection level 0: No restriction |
Restrictions |
Define target systems for RFC calls.
In Customizing choose .
SAP CRM |
SAP ECC |
|
|---|---|---|
RFC destination |
CR7CLNT700 |
R38CLNT900 |
Connection type |
3 |
3 |
Load distrib. |
No |
No |
Target host |
host-cr7.wdf.sap-ag.de |
host-r38.wdf.sap-ag.de |
System number |
00 |
00 |
Description |
CRM Client 700 |
ECC Client 800 |
Language |
EN |
EN |
Client |
700 |
800 |
User |
CRMATP |
CRMATP |
Password |
******** |
********* |
Test the RFC connections.