Raspberry PI Ethernet connected to one HAT port, the other HAT port connected to network (may connect to PoE HAT)

• Features
  • MAC + VLAN + IP based stream classification
  • Qbv + Qci in hardware, Qcc in software
• Use Case:
  • TSN endpoint
  • Simple Real-time endpoint
  • More information how to launch a usecase

Raspberry PI Ethernet connected to one HAT port, other two HAT ports connected to network (one of them may connect to PoE HAT)

• Features:
  • MAC + VLAN + IP based stream classification
  • Qbv+Qci in hardware, Qcc in software
• Use Cases:
  • Switched TSN endpoint
  • Real-time endpoint, e.g., Profinet
  • Transparent real-time TAP, for traffic monitoring or timestamp injection
  • Real-time Traffic Generator/Analyzer (Device under Test (DUT) testing)
  • Legacy-to-TSN bridging (Qbv and Qci)
  • More information how to launch a usecase

Why?

The standard Raspberry PI network interface does not provide:

• precise or accurate timestamping
• precise or accurate transmission times or rate shaping

InnoRoute has a competitive TSN implementation for FPGAs, used in its TrustNode switches/routers, and experience in real-time networking.
The Raspberry PI is a widely used and easy to use open-source platform: why don't you use it for accurate network testing on a budget, to avoid expensive specialized hardware?

Is this just another SPI network card for the Raspberry PI?

No, SPI is just used only for configuration, while packets/frames are forwarded only through Ethernet ports.

Will the Raspberry PI 3 be supported?

For the TSN features, InnoRoute provides patches to the network driver of the Raspberry PI 4. For the Raspberry PI 3 the same changes need to be applied. So InnoRoute started with the Raspberry PI 4 and supports the Raspberry PI 3 at a later point in time. In the meantime, you are free to use the code in our git repository https://github.com/InnoRoute/linux and adapt it to other platforms. (You are welcome to create pull requests to share your code with other users 🙂 )

What is the throughput of the HAT?

The HAT provides line-rate forwarding at the selected speed (10/100/1000 Mbps per port). Forwarding is limited just by the Raspberry PI's Ethernet interface:

• Raspberry PI 4: 1 Gbps
• Raspberry PI 3b+ and below: throughput is limited by the USB network interface of the Raspberry PI mainboard, but the HAT supports Gigabit line-speed, which is important, e.g., for time-triggered transmission

Does the PoE HAT work with the Real-Time-HAT™?

Yes, the Real-Time HAT connects one of its ports to a HAT above using the standard 4 PoE-Pins, so the PoE HAT fits on top.