Introduction

Differentiated services or DiffServ is an architecture that specifies a scalable mechanism for classifying network traffic an providing quality of service. It's an evolution of previous technologies such as the TOS-bits in the IPv4 header.

Test Setup

Test Configuration

Testing the result of DiffServ in your network can be done easily using ByteBlower. Once your network devices such as routers and L3 switches, you can verify the result by sending traffic with the appropriate DiffServ flags.

ByteBlower implementation

ByteBlower GUI project

Download

The ByteBlower project file can be found here.

Creation

The ByteBlower GUI allows you to create different frames with different configurations. We use this feature to create the different frames with different DiffServ classes. We use these frames in different flow templates we can then apply between different ports. Depending on your specific network setup and configuration, the flow template can be adjusted ( speeds, …. ) to fit your needs.

Our flows will measure both the packet loss and latency to compare all QoS parameters.

Running a test will produce where you can compare the results with the expected outcome.