May 19, 2025 · A place to discuss the P4 Programming Language and Ecosystem

Apr 2, 2023 · A P4 register is in some ways better named an “array”, if that makes it more familiar to you. It is an array of values, all with the same type. A read operation retrieves the value …

Sep 3, 2022 · The P4 program is written so that at least some such injected packets from the controller perform read or write operations on a P4 register array, and send a packet back to …

Jun 27, 2021 · Pick one of these: (a) I have an existing Ubuntu 16.04, 18.04, or 20.04 Linux system, and I want to install the open source P4 development tools on it (b) I am comfortable …

Dec 28, 2024 · The P4_16 language spec includes a sample P4_16 architecture, called “Very Simple Switch Architecture” to illustrate the necessary points. PSA, PNA, v1model, TNA, …

Feb 23, 2022 · 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 …

Sep 5, 2023 · Hi everybody. I’m new with P4 and I’m wondering if it’s possible to run a P4 program inside a docker container. I tried the GitHub - cslev/p4-bmv2-docker: P4 BMV2 …

May 14, 2022 · Hi, can someone plz explain how do tables work and what is the relation between key and actions?

Oct 18, 2025 · While writing a P4 program on BMv2 (v1model), I encountered a conceptual issue. In the data plane, it seems natural to process multiple packets in parallel. However, when …

Jan 23, 2022 · That is defined by the P4 archticture, and if your P4 code is allowed to know the input port (it is in both v1model and TNA architectures), you can find out what the name of that …