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RARE (Router for Academia, Research & Education) is an ongoing effort under the GÉANT 3rd4th programme which focus on determining if a routing software platform solution can fit R&E use cases. The project aims to integrate different pieces of software related to these building blocks:

  • control plane: RARE uses FreeRouter under the hood used as the control plane component
  • data plane: (not only P4) P4 behavioural language is used to describe the behavioral model packet processing behaviour of RARE data plane
  • and communication interface between the control plane and data plane: Interface compliant to P4Runtime specification ensure this function

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Tip
titleResulting work
  • Software interface that maps the forwarding state used by a an Open source control plane (FreeRouter)
  •  to P4- programmable data plane running RARE P4 software

P4 is such a an example of language proposing an interface that allows data plane programmability.

Warning
titleNote

P4 core language attempts to be as much as possible independent from the target or NPU or Programmable Switching ASIC processor architecture. However architecture dependance is still prominent. Code adjustments followed by a target specific compilation is necessary if you want to run your p4 program on a specific architecture.

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