hello, I am a beginner of NS2. I have a trouble when I program a project. I want to do a simulation by NS2. I have a set of client node and a set of server node. The client node send the ftp request, then, I wish program a scheduler to decide which server service for the client, and connect them for ftp service. When all of servers are servicing for client, the other client must suspend to waiting the server. When a server finish a serice, it en-quene and service for other client. I intend to use a multi-process program to deal with it. How can i do it in the NS2/TCL? Thanks arcter