examples

P4 Examples

Compilation of different P4 examples. In overall, these examples cover almost all the simple switch features (with some exceptions). Thus, they can perfectly be used as a guide or cheat sheet.

To run the examples without any modification you have to first install p4-utils. P4-utils its a set of tools built on top of mininet that help with the developement and testing of p4 networks.

Examples

Examples are classified in different categories depending on which is the feature they exhibit the most.

Basic Examples

• Packet reflector
• Packet Repeater
• Source Routing
• Dropping packets with wrong checksum
• Equal-Cost Multipath
• Flowlet Switching
• Simple L3 Forwarding 1
• Simple L3 Forwarding 2

Registers, Counters, Meters

• Counters
• Heavy Hitter Detection
• Read/Write the content of registers through the CLI
• Simple stateful firewall
• Meters

Clone, Recirculate, Resubmit

• Simple Recirculation
• Recirculate and add headers to the packet
• Comparing resubmit with recirculate

Monitoring Switch State

• Explicit Congestion Notification (ECN)
• Simple In-Band Network Telemtry

Communicating with the Control Plane

• Cloning packets to a controller
• Digesting packets to a controller
• Learning Switch

Misc

• Using tables for debugging
• How to run P4 code with just command lines?
• Multicasting/Broadcasting Packets