Updates:

• July 8th, 2013: Fixed typo in step 2 (the description of step  for system alias maintenance) and explained importance of the field system id in this step.
• July 9th: According to the hint from Roy I now recommend to activate the flag "for local app"

In the past I have frequently been asked for a quick starter configuration guide for SAP NetWeaver Gateway since the configuration guide does explain all options which might confuse people.

In this document I therefore want to describe the basic configuration steps that have to be performed to activate SAP NetWeaver Gateway if

1. embedded deploymenthas been chosen or if
2. IW_BEP is deployed on the hub

in thess cases the core components for SAP NetWeaver Gateway (GW_CORE, IW_FND and IW_BEP) and any optional backend components are deployed together in the SAP Business Suite backend system or at least IW_BEP is deployed on the hub system which is also a good idea in case you want to set up a hub-based deployment.

So this quick starter configuration guide will also help you if you set up a Gateway hub system.

After you have performed these three steps you should be able to develop a service on the hub / embedded system and publish it. You will nevetheless have to perform additional configuration steps later on as described in the configuration guide.

Prerequisite: Deploy the Add-Ons IW_BEP, GW_CORE and IW_FND

As a prerequisite you have to deploy at least the following three add-ons IW_BEP, GW_CORE and IW_FND using transaction SAINT.

Step 1: Activate SAP NetWeaver Gateway  

As described in the Online Help you start transaction SPRO and navigate to the Activate or Deactivate SAP NetWeaver Gateway node in the implementation guide (IMG).

Step 2: Create a SAP System Alias

You now have to create a system alias entry that points from the hub system to the backend system. Since you have chosen an embedded deployment you will create a system alias entry LOCAL using the RFC destination NONE. This is described in the Online Help.

Here you fill in the following values:

This is shown as an example in the following screen shot:

Caution:

You must maintain the field System ID though it is not mandatory. This is because transaction SEGW when being run in the backend selects all system alias entries of the backend system from where it calls the hub using the SID of the backend as a filter. If no value is maintained the system alias will not show up in the list. If only one entry is found it is taken as a default and no dialogue will show up.

Step 3: Create a Gateway Alias

This step is needed to have at least one entry for the Gateway hub in the Service Builder (transaction SEGW) to register services that you are going to develop. This is described in the online help.

Please note that this time you have to navigate to a different part in the implementation guide called Gateway Service Enablement that contains the Gateway hub specific customizing settings.

Here you enter the following values

This is shown as an example in the following screen shot.

Step 4: Activate node 'opu'

1. In a freshly installed system you have to activate the 'opu' node using SICF.
   
   
2. In the following dialogue you have to confirm that all sub nodes shall be activated as well
   
   
3. Press refresh
   
   
4. Expand the node 'opu' again and to check whether the changes have been performed
   
   

Step 5: Test Your Settings

You can now test your settings by developing a simple service using the Service Builder (transaction SEGW).

As you can see the name of the destination system of the SAP NetWeaver Gateway alias is shown in the Service Maintanance node in SEGW.

When choosing Maintain in the context menu the Activate and Maintain Service transaction is started on the hub system. Please note that the service has been registered for the system alias LOCAL that you have maintained in step 2.

Step 6: (For Development Systems Only !)

Since this quick starter configuration guide will probably mostly used for development or test systems I would like to recommend to raise the Error Log Level for the error log in IW_BEP and IW_FND.

Use the following transactions to change the settings for the Error Log Level from Secure to Full as shown in the following screen shots:

Backend Error Log --> transaction /n/iwbep/error_log . There from the menu choose Error Log --> Global Configuration

and

Gateway Server Error Log --> via transaction /n/iwfnd/error_log . There from the menu choose Error Log --> Global Configuration