Solved CakeQOS not limiting download

[eConnah]

I have an TUF-AX3000 V2 and I'm trying to setup CakeQOS using merlin, specifically 3004.388.8_2-gnuton1. I'm using pppoe on full fibre, 100/20 connection. The bandwidth limiter for upload works perfectly well but for download it just doesn't work. It works using flex but I'm unsure why it doesn't with cake.
Here are my settings:

Any help would be great thanks.

 

[dave14305]

cat /etc/cake-qos.conf
tc qdisc

Can you post the output of these commands run over SSH?

 

[eConnah]

Sure, here:

 

[dave14305]

Ok, how about:

tc -s qdisc show dev ifb4ppp0

Maybe run it before and after a speedtest.

 

[eConnah]

before:

after:

 

[dave14305]

Hmm. How about:

tc filter show dev ppp0 parent ffff:

 

[eConnah]

It doesn't output anything

 

[dave14305]

Try to run this command:

tc filter add dev ppp0 parent ffff: prio 10 matchall action mirred egress redirect dev ifb4ppp0

 

[eConnah]

 

[dave14305]

You should report back to Gnuton that he needs to enable CONFIG_NET_CLS_MATCHALL in his firmware. But first confirm the output of uname -r shows 4.19. If not, that’s not the issue.

 

[eConnah]

It shows 4.19.183, should I just create a github issue on his page? Thanks for trying tho.

 

[dave14305]

You can try this command instead and see if the download gets limited.

tc filter add dev ppp0 parent ffff: protocol all prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev ifb4ppp0

 

[eConnah]

That fixed it the download is now getting limited a bit more below the target around 6 mbps lower than the goal but I assume thats normal, however I re-applied the settings in qos and it seems to undo the fix.

 

[dave14305]

That fixed it the download is now getting limited a bit more below the target around 6 mbps lower than the goal but I assume thats normal, however I re-applied the settings in qos and it seems to undo the fix.

You can make the workaround persist by setting up a script:

cat >/jffs/scripts/qos-start <<-EOF
#!/bin/sh
sed -i 's/tc filter add dev .*/tc filter add dev \$DLIF parent ffff: protocol all prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev \$MIF/g' /tmp/qos
EOF
chmod 755 /jffs/scripts/qos-start
service restart_qos

 

[eConnah]

Thank you so much thats perfect, I'll create a github error so he can take notice and try and fix it on the main build.
Edit: github link -> https://github.com/gnuton/asuswrt-merlin.ng/issues/727