Hello. Containerlab gives me the virtual network topology ( links through veth pairs, containers etc.). The actual BNG's Control plane ( authentication, authorization, session handling, traffic shaping, events streaming etc. ) is written by me. So it's less running off-the-shelf software running on virtualized hardware, and more writing the software and running it on a virtualized hardware.

At some point, I did use Nokia SR Linux as my access node + relay, but had issues with configuration and Option 82. Later, I wrote one myself.