Interfacing Simulations with Live Devices and Traffic Using OPNET's ...

1578 Interfacing Simulations with Live Devices and Traffic Using OPNET's System-in-the-LoopBest Practices (cont.)• Issues when preparing a model for a SITL co-simulation (cont.)• IP addressing has to be consistent across simulated and real network• Should manually assign Ethernet and IP addresses prior to running simulation• Do not reuse the Ethernet adapter address for SITL gateway or simulation nodes• Custom models may need to be modified to remove assumption that all nodes in thenetwork appear in the simulation• Nodes in the “real” network don’t necessarily have representations in the simulation• Packets coming from “real” network don’t contain simulation-level data (e.g.,creation time, creation module, packet ownership, segmentation info, etc.)• Turn off Standard Model Library simulation efficiencies in most cases(e.g., “OSPF Sim Efficiency” – you don’t want to stop hello messages)CONFIDENTIAL ─ RESTRICTED ACCESS: This information may not be disclosed, copied, or transmitted in any format without the prior written consent of OPNET Technologies, Inc. © 2010 OPNET Technologies, Inc.16