vRouter is an experimental IP-network simulator. It supports the simulation of packet “flows” across a network. Arbitrary networks are described using a simple scripting language. vRouter predicts packet loss and delay given a network configuration and a description of traffic.
You can download it from the following link: https://packetstormsecurity.com/files/download/13374/vRouter-0.01.tar.gz
Source: https://packetstormsecurity.com/files/13374/vRouter-0.01.tar.gz.html