Traffic Prioritizion

Installing and Using OpenWrt
1

Hello Forum,

is it possible in openwrt to prioritize the traffic of one client ?
I have my work-laptop that is making a VPN-connection to my company. Via this, I also make VoIP- and Videocalls. If, for example, I make a download on an other client the VoIP-calls are almost impossible to make. So, I want to prioritize the traffic of the laptop's IP. Is there a chance ?

thanks in advice
Rocky

2

There are 2 different approaches:

  1. Smartqueue management (active queue management)
    https://openwrt.org/docs/guide-user/network/traffic-shaping/sqm

This one basically avoids bufferbloat.

  1. For hard prioritizing according to whatever rules ( more complex to set up):
    https://openwrt.org/docs/guide-user/network/traffic-shaping/packet.scheduler

You are asking for the 2nd one.

3

Untrue, you can set DSCP marks while using SQM and thus combat buffer lost and prioritize the traffic you want. SQM is the way to go

4

thanks for you quick reply !
Sounds really difficult. So, first of all I need the package: luci-app-sqm, right ?
But then, how to go on ?

5

For initial SQM setup see this page: https://openwrt.org/docs/guide-user/network/traffic-shaping/sqm

setup cake and layer_cake
Use custom firewall rules to set desired DSCP marks. There are more threads about this but this one shows info on how to check if everything is working properly: Checking DSCP tags

6

Start by installing luci-app-sqm and enabling the simplest SQM config (piece_of_cake.qos) with sensible bandwidth settings. This will probably be enough to solve your problems, without having to get down and dirty with layer_cake.qos and DSCP tagging.