I am looking for possible network simulation software that able to incorporate with autonomic computing with robust and dynamic features . Such as adding new modules , enhanced the existing frameworks and etc. I have my own experience using OPNET Modeller ( now known as Riverbed Modeller ) , Packet Tracer ( Cisco ) , Ns2 and Ns3 ( trying to avoid this because my target simulation is the ISP environment with autonomic computing approach . Looking forward more enterprise version rather than open source ). Thanks in advance