ndnSIM 2: An updated NDN simulator for NS-3

The fundamental departure of the Named-Data Networking (NDN) communication paradigm from the IP principles requires extensive evaluation through experimentation, and simulation is a necessary tool to enable the experimentation at scale. We released the first version of ndnSIM, an open source NS-3-based NDN simulator, back in June 2012. Since then, ndnSIM has undergone substantial development resulting in ndnSIM 2, the first version of which was released in January 2015. This paper reports the design and features of the updated simulator. The goal of the updated simulator is to match the simulation platform to the latest advancements of NDN research. Therefore, it uses the ndn-cxx library (NDN C++ library with eXperimental eXtensions) and the NDN Forwarding Daemon (NFD) to enable experiments with real code in a simulation environment.