OMNeT++ Overview

OMNeT++ is a simulation framework that operates in a bottom-up, per-node model — each simulated host is an individual module that independently handles its own traffic. Because of this, when using NSB with OMNeT++, you should configure NSB in Per-Node simulator mode (simulator_mode: 1).

What the Integration Looks Like

In this integration:

• Each simulated OMNeT++ node module has its own NSBSimClient instance, identified to match the corresponding NSBAppClient
• When the OMNeT++ module receives a message, it calls post() to notify NSB; when it needs to inject traffic, it calls fetch()

Two Example Setups

Setup	Covers
nsb_omnet_basic	Pure OMNeT++ (no INET) — a minimal NSBHost module wired into a NED network
nsb_omnet_inet	OMNeT++ with the INET framework — realistic wireless/wired simulation using UDP transport

Go Deeper

• Tutorials → OMNeT++ Basic Integration — full step-by-step setup for the pure OMNeT++ example
• Tutorials → OMNeT++ with INET — full step-by-step setup for the INET-based example
• System-Wide vs Per-Node — why Per-Node fits OMNeT++'s architecture
• Configuration → Simulator Modes — the simulator_mode: 1 field