Borrow and Guarantee Bandwidth per Interface

[hege]

Hello,

my setup:

WAN (100/100Mb)
|
pfSense
|          |          |
Top1  Top2    Top3

Top1 pays for 30Mb
Top2 pays for 50Mb
Top3 pays for 20Mb

Currently I have a simple CBQ shaping setup with the borrow option enabled, but that only allows me to upload with 100Mb (if available) and download with the paid bandwidth.
As far as I know, I simple need to create a bridge with Top1-3 as member and apply the shaper to the bridge, but my problem is, that top1-3 are defined as Vlan and I have no other option except vlan.
So I tried enabling the bridge and also set the pf filter option for the bridge in tunables but it does not seem that the bridge get the traffic.

Any idea what I made wrong?