I have been looking through some documentation and researching this some. I am not seeing a way to monitor TX/RX based on the VLAN, just the port.  If I run across anything that says otherwise I will be sure to post an update.
Hi,  We recently started using Observium as networkgraphing solution, and it uses SNMP to retrieve transferdata for the physical ports, but it is unable to get it for the VLANs, is it even possible in the firmware to do that? The data for the physical ports work great, and i just want to check if it is possible before i spend too much time trying to get it to work. BrAndreas  
GraphingTX/RX on Vlan Power connect 5424