1.define logical systems.(ex LS100,Ls110)
2.assign logical system to respective clients(in client 
100).
   100 - LS100
   110 - LS110.
3.maintain RFC destination(in client 100)
     provides communication between 100 & 110.
       from LS100 ->Ls110 (forwarding data)
  maintain RFC destination for receiving data from 110
       from LS110 -> LS100 (reverse data)
4.maintain customer distribution model(CDM) in client 100.
         Name of cdm:LSmodel
      provide sender:LS100
            receiver:LS110
        message type:MATMAS

5.generate partner profiles.
6.distribute CDM for making client independent then only 
client 110 can be able to generate port
7.create material by using transaction code MM01 in client 
100.
8.based on material execute BD10 for send material T.code 
in 100.
9.let us check IDOC status by
     go with IDOC lists in WE05 T.code
10.execute BD11 in client 110 for get material T.code
     after executing BD11 T.code inbound system will 
receive the IDOC.
11.let us check IDOC status in client 110.
    go with IDOC lists->WE05 T.code
12.if we find any errors in IDOC weather inbound side or 
outbound side for rectifying errors we can use ALE TESTING 
TOOL.
   T.code is WE19.