I'm plugging this amazing resource (not only containers but also virtual machines...): https://developers.redhat.com/blog/2018/10/22/introduction-to-Linux-inter

I'm plugging this amazing resource (not only containers but also virtual machines...): https://developers.redhat.com/blog/2018/10/22/introduction-to-Linux-interfaces-for-virtual-networking https://developers.redhat.com/blog/2018/10/22/introduction-t... It's lower lever than OP but might give ideas.