maintaning logical systems and assigning clients to logical 
systems and maintaning cdm by tcodebd64 and maintaning rfc 
destination by sm49

In ALE configaretion Main thing is  to Form a bridge 
between to or more Systems,that means to configure the 
required systems through Creating  Logical Systems Using 
TCODE SALE.
  That is related to Basis Guys, some time ABAPer Can do.
and also test the configuretion using the Remote Logon i,e. 
SM 59. After that BD64 to Distiributon Model.

ALE configuration :
Goto SALE T-code then 
1) Design LogicalSystem and go back to IMG initial Screen
and 2) Assign Logical System to the client.
3)then Goto SM59 to create RFC Destinatio for the Logical 
System (i.e.receiver system.).
4) then Goto WE21 T-code for Port Creation in WE20 select
 TranscationalPort and create your Own Port.
5) Goto BD64 T-code for  Distribution Model
  here we create Model view and specifies the what kind of  
Message is distributed between them .
6)we'll save and goto environment in the menu bar..
7) goto we20 T-code for Partner Profile ..create the 
Partner file ..and give inbound and outbound messagetypes.

  These r the steps for ALE Configuration.

Suppose If u Specify Matmas as Message type ...got BD10 and 
sent the material .

I think this my help you...