QoS over Speedfusion using subtunnels and data ports

Hello
We tried to implement QoS over speedfusion sub-tunnels as follows:

  • We defined 2 sub-tunnels which use different data ports 5001 and 5002
  • We created an application queue (under QoS → application queues) queue1 with 6Mbps upload and download guaranteed bandwidth on both tunnel-end devices.
  • Also on both devices we defined an application app1 by its UDP port 5001 and assigned queue1 to it hoping that the device treats this traffic as any other type of user traffic and applies QoS on it.

Unfortunately , it did not work. Is it because QoS applies only to user traffic not to traffic initiated by the routers? Can this behavior be changed?

We are using 8.3

Is there any other way to use QoS over speedfusion?

The original purpose of the above is to prioritize a specific traffic comparing to the rest of traffic over the SpeedFusion tunnel using a variable bandwidth WAN connection. Guaranteeing bandwidth for it would be great.