Network lab with KVM Linux

It's impressive how much money you can save on the leccy bill by switching to a virtualised lab.

The only things i cant virtualise well enough are cisco ios or sparc openboot prompt shenannigans. I still fire up an old ultra 80 every so often and it actually draws surprisingly little. It does sound like a jet taking off unfortunately though... The old ultra 60s with the sound deadening kits fitted were impressively quiet, but all these antiques are bin fodder now.