One other hobby of mine (also with a certain professional component) is networking. In particular, my primary interest are networking aspects centered around the hardware available to me -- which is incidentally Cisco stuff. I don't claim that the following sub-pages might be useful for practical purposes.

Indeed, if you for example turn a redundantly connected switch into a (virtual) hub, the consequences for a live network will be most certainly devastating.

I therefore advise caution. The experiments are to be taken as such and are meant for lab environments only.