Emulation with tap interfaces

[zopfbit]

Hello,

I am trying to use ExtUpperEthernetInterface to connect real application components with simulated components in INET. My understanding is that the lower part of this interface relies on TAP devices in the host OS to exchange packets with the host networking stack.

My setup is based mainly on two references:

Using TAP devices with Docker containers:
https://www.sei.cmu.edu/blog/how-to-use-docker-and-ns-3-to-create-realistic-network-simulations/

INET emulation with ExtUpperEthernetInterface (videostreaming showcase):

Any guidance on how to systematically debug this setup, verify TAP device operation, or validate packet flow between INET and the host network stack would be appreciated. My code can be foudn under: https://github.com/zopfbit/inet-docker-integration