Re: Bridge and VLAN trunk

That's correct. Support was added to the Linux host-bridge device a few years ago for per-port VLAN tagging/filtering, but there hasn't been anyone sufficiently compelled (by their own needs or by their altruistic instincts) to support that. It likely would be fairly straightforward to do once someone dove into it - all the necessary config attributes are already there, so it would just involve recognizing and acting on them when a guest interface connected to a bridge that was a standard Linux host bridge (of course in reality there will likely be some unexpected incompatibility that will make it more difficult, but at least *in theory* it would be simple).

So, if you can program in C and are willing to dig into the online docs for setting per-port attributes for Linux host bridges and implementing them (iirc via sending netlink messages) then feel free to start hacking, and check in on irc.oftc.net in the #virt channel if you have questions. Otherwise, I would recommend installing Open vSwitch. I don't have a link handy, but I've seen a few HOWTOs floating around, and followed one of them a few years ago to set it up on Fedora and RHEL test machines.