2024年7月31日 · A place to discuss the P4 Programming Language and Ecosystem. After adding a new switch, the host connected to the new switch do not ping with the hosts in the original topology

2022年2月23日 · The P4 16 language version (this is a perception more than a fact) seems to have put the PISA term aside. P4 16 also required the “architecture” concept (like V1Model) so the concept of PISA made more sense to how you define the pipeline when talking about P4 14-programmable targets.

2023年4月2日 · Hello, I’ve some questions regarding registers in P4 that I’d appreciate if someone could clarify: When I use read in a register am I taking out the stored value or does the value remain stored? If a value is stored within a register position, does writing in that position replace the previous content? Is there any way to fully erase/reset the content stored within a …

2022年5月14日 · PD: And just to be clear, I call a P4 device a switch, but it can parse L2, L3 and L4 headers, and even application layers headers if that makes sense to your use case. So this is not only a typical L2 switch but rather a device that acts in pretty much all layers.

2024年11月7日 · Folks, I am leading a research group at a university. We want to use P4 for CPS applications and are in the process of purchasing two Tofino2 switches. For that, I recently applied for the Intel Connectivity Research Program to obtain the Intel P4Studio before we can buy the hardware. The notification says there is a 20-business-day lead time for verification. Those …

2024年12月28日 · The P4 architecture identifies the P4-programmable blocks (e.g., parser, ingress control flow, egress control flow, deparser, etc.) and their data plane interfaces. It then goes on describing the details (e.g. what extern objects are) and the specific P4_16 constructs P4_16 that can be used to formally describe those interfaces.

2023年10月13日 · As for your specific method (assigning the values in question to some temporary metadata and watching the logs), again, a lot will depend on the specific target. For example, if these assignments have no further effect on the execution, an optimizing P4 compiler will probably remove them as a part of dead code elimination pass.

2022年9月3日 · The program registeraccess.p4 and the PTF tests in registeraccess.py demonstrate perhaps an unusual way to access a P4 register array from the controller, which is to use PacketOut messages to inject packets from the controller into the data plane, which are then processed by the P4 program. The P4 program is written so that at least some such ...

2023年1月14日 · Hello, I have started the simple_switch on an ubuntu server with the command (sudo simple_switch_grpc -i 0@enp0s25 app.json (where app.json is the json got from the compilation of p4 program from p4c)). The interface that I am using is enp0s25 (which is physical ethernet on the server) I have loaded the ICMP program from p4pi on the switch …

2025年2月24日 · A place to discuss the P4 Programming Language and Ecosystem. A simple P4 program plus controller in Python for demonstrating PacketIn messages from switch to controller