A good tool to try this stuff is containerlab: https://containerlab.dev/ https://containerlab.dev/ It lets you setup multiple containers with direct connection

A good tool to try this stuff is containerlab: https://containerlab.dev/ https://containerlab.dev/ It lets you setup multiple containers with direct connections between them in whatever topology you want. It allows you to run both Linux containers (with FRR for example) and emulated versions of popular router platforms (some of the ones mentioned in the article).