Simulation: Coordination of chained virtual network functions

Simulate flow-level, inter-node network coordination including scaling and placement of services and routing flows between them. Note: this repository holds an altered version of the original simulator coord-sim, adapted to my needs in order to accomplish my bachelor thesis.

Additional features:

• Forwarding capabilities. Prior to this, forwarding happened implicit. Now flows are explicit forwarded over link, taking into account individual link utilization
• Individual flow forwarding rules. A node can make a forwarding decision on individual flows.
• Individual flow processing rules. A node can explicit decide if it will process a flow.
• Extended simulator state and action interface.
• Algorithm callback interface. To allow a external algorithm to capture certain event, it can register callback functions invoked by the flowsimulator.
  • init_flow callback
  • pass_flow callback
  • periodic measurement callbacks.
• Adapted metrics.
• Egress node routing.
• Extended simulator configuration

Setup

Requires Python 3.6. Install with virtualenv to not break original coord-sim installation. Make sure to install simulator with adapted source files, located on the default adapted branch:

git checkout adapted

Then follow original setup procedure:

pip install -r requirements.txt

Notes

Due to the use of deprecated networkx functions and their removal in the 2.4 version, released while developing, the networkx library is locked to version 2.3