Todays router adventure consisted of getting VLANs working with the X450s between the SJH building and 400 Harris street (where I'm not welcome anymore if I don't wear closed-toe shoes).
The idea is very simple: Take an ethernet link, define one or more VLANs on top of it, give certain VLANs a better priority than the others.
Buuuuuut.... No matter what we did, it didn't work.
After three hours reading up on documentation ("it can't be that difficult, can it?"), I called Uecomm and asked them the question "Is this possible at all?". Some seconds later the guy on the other side said: "No".
That was the short answer. The long answer is that it is supported if the CPE supports 801.1qinq, a protocol to support tagged VLANs in tagged VLANs.
So much for a great plan to make the whole network a little bit more workable.
Additional note: Also PIPE networks doesn't support this by default. Scary. This is not what I had in mind when we bought an ethernet service.