Introduction to transparency testing

Transparency testing in Netrounds consists of packet mangling and network transparency/QoS tests which verify:

  • that Layer 2 and Layer 3 services are transparent, i.e. that various packet types are received unchanged from the sender
  • that the network passes various protocols/Ethertypes
  • that the network preserves the QoS fields.

This test suite gives you a toolbox for in-depth verification of how the network affects various types of traffic and whether a point-to-point connection has the characteristics you would expect. All tests are designed according to best practice on how to verify the characteristics of point-to-point networks.

The tests are suitable both for lab setups and for end-to-end testing in a live network.

Physical test setup

To perform transparency tests, two Netrounds Test Agents are needed in the setup, one acting as sender and the other as receiver. If you want to test more connections, you need to create separate tests for each connection.

Two interfaces are used on the Test Agents: one interface on each Test Agent is used as test interface, and the other ("eth0") is used for management, maintaining an encrypted connection to the Netrounds cloud servers. The management interface cannot be used for testing.

Some transparency tests can only be executed on physical interfaces, while others can also run on VLAN interfaces. The generated traffic is either untagged or contains one or two VLAN headers, depending on the test.

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