I used to manage network through /etc/network/interfaces.
Most of my use case are vlans (ie: eth0.1) an aliases (ie: eth1:3)
My context in headless VMs (no DE, no Xorg, no GUI)
With Jessie and systemd: is it still managed with /etc/network/interfaces?
For the mount component, I found that systemd kind of "sources" /etc/fstab and converts it to something for it (so, no worry about fstab), but how about networking?