Modeling Ip over Atm

ATM is becoming a widely used technology as a backbone for connecting data networks. An important consideration when analyzing the performance of data traffic over switched networks such as ATM is the routing scheme utilized. The IP layer traditionally handles all routing processes in TCP/IP networks. For ATM, OPNET contains standard models that map IP packet traffic to ATM virtual circuits. However, there have been many advances in IP switches and IP routing over ATM that should be considered. A simulation model may need to incorporate hop-by-hop IP routing, shortcut ATM routing and IP flow switching. This paper surveys the current state-of-the-art in integrated IP over ATM routing. Related topics in TCP and ATM are also discussed. OPNET models for IP and ATM are described along with possible approaches for model enhancement.