Hey Dunuin,
I just want the PVE webgui to be reached from vmbr3 with IP 192.168.30.7 and VLAN 300. I guess, the problem comes with the VLAN. I can give the IP in Range 30.X, but there is no VLAN 300 tag. As all other devices communicated on VLAN 300, but the vmbr3-webgui "doesn't know" about...