hadarelv

Good day First of all, I would like to mention that I have already read the Mikrotik Wiki, multiple configuration examples and read a lot of forum topics about QoS with configurations similar to what I want to achieve. I am also (very) new to networking, so I might have missed some important points. My setup looks like this: - Mikrotik wAP (model RBwAPG-5HacT2HnD) with RouterOS 6.45.9 is connected via its single LAN port to a Linux desktop. Mikrotik works in "ap bridge" mode. It is also set to the 2.4GHz B so that I can limit the physically available bandwidth to 10Mbit/s (in reality I get ~6Mbit/s). All interfaces are bridged. - A Linux Laptop is connected to the 2.4GHz channel of Mikrotik I wrote the simplest server-client C program to send ping-like message from client to server and back per TCP connection. What I want to do now is to guarantee at least 200kbit/s to the connection between my ping-like program, while iperf3 generates as much traffic as it can to saturate the link (read: prioritise my C programms traffic over iperf3). Desktop acts as client and sends a single „double“ over WiFi to laptop, which then increments the „double“ and sends it back. I want to achieve the desired „prioritisation“ of my ping-like traffic with help of Queue Trees. In order to do that, I configured the tree in following way: /queue tree add max-limit=10M name=to-fr-parent parent=global add limit-at=200k max-limit=10M name=to-fr-high-prio packet-mark=br-high-prio-to-fr parent=to-fr-parent priority=1 add limit-at=2M max-limit=10M name=to-fr-low-prio packet-mark=br-bulk-to-fr parent=to-fr-parent add max-limit=10M name=from-fr-parent parent=global add limit-at=200k max-limit=10M name=from-fr-high-prio packet-mark=br-high-prio-from-fr parent=from-fr-parent priority=1 add limit-at=2M max-limit=10M name=from-fr-low-prio packet-mark=br-bulk-from-fr parent=from-fr-parent This in theory must guarantee 200kbit/s to my ping-like traffic and 2Mbit/s to iperf and the rest will be distributed according to priorities. In my case the rest should go to iperf, because ping-connection takes something about 150kbit/s. In order to make the Queue Tree work, I need to mark the packets to allow their classification in the queue. Because my interfaces are all bridged, I decided to go with Bridge rules, but have also tried IP Firewall rules before. Rules work correctly and mark the desired traffic. I checked this by inspecting Log and Counters. /interface bridge filter add action=mark-packet chain=forward dst-address=192.168.88.254/32 dst-port=5150 ip-protocol=tcp log=yes mac-protocol=ip new-packet-mark=br-high-prio-to-fr add action=mark-packet chain=forward ip-protocol=tcp log=yes mac-protocol=ip new-packet-mark=br-high-prio-from-fr src-address=192.168.88.254/32 src-port=5150 add action=mark-packet chain=forward ip-protocol=tcp log=yes mac-protocol=ip new-packet-mark=br-bulk-from-fr src-address=192.168.88.254/32 src-port=!5150 add action=mark-packet chain=forward dst-address=192.168.88.254/32 dst-port=!5150 ip-protocol=tcp log=yes mac-protocol=ip new-packet-mark=br-bulk-to-fr By inspecting the counters in the Queue Tree tab I can see, that the traffic is marked correctly and is increasing appropriate counters als oin Queue Trees. But here is the problem: When I run iperf3 and then start my ping-like client, it does not become the guaranteed 2Mbit/s and gets delayed a lot (RTT is ~500ms). (He does not even get the actually required 150kbit/s) If I run only ping-like client without iperf traffic I get RTT ~3-6ms. RTT measurement is implemented on the client side. Does anyone see an error in my configuration? What is lacking in my config? P.S. Again, I am very new to networking, so the obvious stuff for you might not be so obvious for me:) P.S.S. Here is the whole config of the router: https://pastebin.com/yXix5fwb

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