- each computer should have its configuration
	- QEMU
	- systemd-networkd? (
	- BIRD
- Also: bridges-up script to set up all the bridges.
- Network should have reasonable addressing scheme
	- IP
	- MAC

MAC:52:54:00:17:<mach>:<net>
IP: 172.23.<net>.<mach>

Rationale: mac is host-based, ip is net-based. This mimmics real networks. The
23 = 0x17 is just a number between 16 and 31 without meaning. MAC OUI is from
QEMU, could be something else (it _is_ locally administered), but this is
recognisable.

QEMU flags:
	-enable-kvm
	-m 200M # enough?
	-drive ...
	- networks (copy from Zr/arch)
	-name
- Networks: just bridges with tap-s attached.
- OS: Alpine? (/etc/network/interfaces is configurable by mac)
- Clonined hdds? Single base hdd + overlay for bird.conf?

Impl: python with jinja. We want a templating engine, since most of the configs
are the same, and something to represent computers and networks.