Following the example given here: https://www.freecodecamp.org/news/how-to-use-scapy-python-networking/ I did sendp(frame) while watching 'journalctl -f'. It showed me: kernel: DEBUG: IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:11:22:33:44:55:90:00 Unless I am completely mistaken, this L2 frame was sent and logged.