Differentiated Services with VRs and ns2

• Comparison of ns simulations with VR experiments.

• Focus is on Assured Forwarding, since Expedited Forwarding is more “robust”.

• AF with two drop precedences only (Assured Service).

• Virtual Router setup on a single computer.

• Simple bottleneck topology.

• Evaluation of Virtual Routers using standard measurement tools (e.g. ttcp).