This example illustrates a more complicated P4 switching scenario.
Image taken from p4lang/tutorials
Run this example from the top-level directory:
python3 -m examples.forwarding.run
This will load the program from p4/forwarding.json which was compiled from
p4/forwarding.p4 on the s* switches. The end hosts h* do not have any P4
program loaded.
In the example h1 will ping h2, h3, and h4. You will see h2, h3, and h4 receiving the
ping and h1 receiving a response from each. The change in TTL indicates how many intermediate
nodes the packet was switched through.