ndnSIM Release Notes

This file contains ndnSIM release notes.

All of the ndnSIM documentation is accessible from the ndnSIM website.

Release 2.0

Overview

ndnSIM 2.0 is a new release of NS-3 based Named Data Networking (NDN) simulator that went through extensive refactoring and rewriting. The key new features of the new version:

• ndnSIM no longer re-implements basic NDN primitives and directly uses implementation from ndn-cxx library (NDN C++ library with eXperimental eXtensions).

• All NDN forwarding and management is implemented directly using source code of Named Data Networking Forwarding Daemon (NFD). The current code is based on a22a2172611b1cb93b2e2f53d9d5da122b384f3e commit of NFD repository.

  Note RIB Manager is not yet available in ndnSIM.

• Packet format changed to the NDN packet format.

• Code style changes to conform to ndn-cxx Code Style and Coding Guidelines This change also includes renaming of the header and source files: *.h -> *.hpp, *.cc -> *.cpp

• ndnSIM now uses C++11.

New Features

• Integration with NFD codebase:
  • A realistic behavior is added to the simulations.
  • Forwarding plane extensions can be used in both ndnSIM simulations and real NFD deployment.
• Per namespace forwarding strategies for different namespaces (one strategy per namespace).
• New examples:
  • ndn-load-balancer
  • ndn-grid-multiple-strategies
  • ndn-different-strategy-per-prefix
  • Basic examples using python bindings: ndn-simple.py and ndn-grid.py
• Use of the the full-featured NDN packet format.
• Full-featured support for Interest selectors.
• Full-featured crypto operations can be simulated (disabled by default).
• FibHelper to manage FIB entries.
• StrategyChoiceHelper to manage per-namespace forwarding strategy selection.

Changes

• HopCount tracing now includes only one way network-level hop count (e.g., the number of physical links traversed by a packet). Previously, this tracing was round-trip and included applications hops.
• Python bindings have changed and, due to limitations of pybindgen, currently cover a smaller subset of C++ code (Task #2341).
• LinkControlHelper now uses ErrorRate to simulate link failure/recovery. Previously it was relying on Up/Down flag on NDN level.
• The Face abstraction of NFD is now used.

Bug fixes

• Fix processing files with customized LossRate or Queue model in AnnotatedTopologyReader Bug #2354.

Removals

• PyNDN emulation
• (temporarily) ApiFace. Will be replaced with emulation of ndn-cxx ndn::Face in future releases (Issue #2370).
• (temporarily) UdpFace, TcpFace (Issue #2371).
• Limits, LimitsWindow, LimitsRate.
• PIT, FIB with "replacement" policies.
• Old deprecated packet formats.