Prioritizing network traffic with Queue Trees

Hello,

I configured 4 VLANs on interface - ether2 of my Mikrotik box and am trying to prioritize a particular user’s traffic by using IP Firewall Mangle (connection-mark and packet-mark).I am trying to prioritize the marked IP traffic so that this particular user gets 2Mbps of download all the time ,by creating a download-queue in queue-trees and assigining it to one of the VLANs of ether2 , setting max-limit and limit-at to 2Mbps,priority to 1 and queue type is default.But am not able to achieve the configured speed of 2Mbps at any time.The paticular VLAN to which am attaching this queue is always congested with 5Mbps (downlink) of traffic and ether2 hold 3 more VLANs along with this VLAN ,total traffic in ether2 will be 15Mbps (downlink).

Is there any bug in the configuration or my understanding of Queueing in Mikrotik ?

You should post configuration export of your queues with the rule, when VLAN queue is not working.