In this paper we describe the design, implementation, and analytical background of the DISCO Network Calculator. The DISCO Network Calculator is an open-source toolbox written in JavaT M which we developed for worst-case analyses based on network calculus. To our knowledge it is the rst of its kind. It allows to do network analyses regarding performance characteristics such as delay and backlog bounds for piecewise linear arrival and service curves. We illustrate the tool's usefulness by two comprehensive example applications. Categories and Subject Descriptors C.2 [Computer Systems Organization]: Computer Communication Networks; C.4 [Computer Systems Organization]: Performance of SystemsModeling Techniques Keywords Network calculus, deterministic guarantees, tool support.
Jens B. Schmitt, Frank A. Zdarsky