ALE or XI

Hi
I have scenario in that we have two sap system one System A (ECC 6.0) and System B (ECC older than 6.0]. in current setup both system are in same landscape and interacting through IDoc (ALE settings). We are replacing System A with new SAP system (again ECC 6.0) say System C, but this new system will not be in same landscape. System A and System B have same enterprise structure but system C belong to different enterprise and require to integrate with system B.
Q1. Can we do communication through ALE setup?
Q2. Should we use SAP XI in between for communication?
Q3. which one is best practice?
Pros and Cons in both the cases?
Edited by: tapan singh on Oct 22, 2010 3:37 PM

Hi Tapan,
XI brings with itself something called as centralized integration platform. In other words it avoids hard coded settings. In case of ALE both sender and the receiver should be able to identify each other in order to integrate. But using XI sender and the receiver need not identify each other as it becomes XIu2019s role to do that and whatever changes are to be done, it can be done in XI and both sender and the receiver need not be disturbed. That means there are separate mappings for each sender-receiver pair but all of them are centralized at one place. In this way, XI is more flexible as compared to ALE. Of course in a scenario where only two systems (one of them is SAP) are involved then in that case customers can choose ALE as there is only single point-to-point integration.If one doesnu2019t have to implement a business logic in the middleware and simply pass an IDOC in that case only ALE can be used you need not couple it with XI.
Regds,
Pinangshuk.

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regards,
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one more thing
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try to set your system to send the vendor data out
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http://scn.sap.com/thread/1535402
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Should I hard code values somewhere?
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Hi All,
i got this question in interview.
Why do we create logical systems in ALE?
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Hi
In addition to above .
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/people/udo.martens/blog/2005/09/30/one-logical-system-name-for-serveral-bpm-acknowledgements
http://help.sap.com/saphelp_nw04/helpdata/en/b5/1d733b73a8f706e10000000a11402f/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/69/c24ca94ba111d189750000e8322d00/content.htm
http://72.14.203.104/search?q=cache:J-uDLyT0w54J:www.topxml.com/biztalkutilities/walkthroughs/SAP%2520Configuration.pdfwhatislogicalsystems+(SAP)&hl=en&gl=in&ct=clnk&cd=5
http://help.sap.com/saphelp_nw04/helpdata/en/78/217dc151ce11d189570000e829fbbd/content.htm
http://help.sap.com/saphelp_nw04s/helpdata/en/d7/9c73631d6c11d2a56e0060087832f8/content.htm
This guide is really good shows step by step procedure.
http://72.14.203.104/search?q=cache:Xyl0zxpyEXsJ:www.sappoint.com/abap/ale.pdfLogicalsystem(ALE)&hl=en&gl=in&ct=clnk&cd=9
for one client config
http://www.sappro.com/downloads/OneClientDistribution.pdf#search=%22Logical%20system(ALE)%22
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hi,
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Hello KALYAN KUMAR,
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Message was edited by: Ravikumar Allampallam

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