SQM on MT6000 / Flint 2

Routers
1

I tried to use SQM on my Flint 2 but it doesn’t seem to work. Network accelerator and IPv6 are both disabled. The only configs running on my router are Tailscale and Adguard but I think that these features doesn’t affect SQM right? Im also using 4.5.4 firmware.

ISP average speed:
450 download
80 upload

My SQM settings -

Upload and Download: I tried 90, 85, and 65 percents but all of these doesn’t made any changes at all.

Interface: Eth1 (WAN I believe)

No advanced configuration.

I cannot really say that this is a problem with Flint 2 right now since I can’t find any threads about users using Flint 2 with SQM so kindly share your experience if you tried it. Thanks!

2

Did you do the SQM test first in wired connection here: https://www.waveform.com/tools/bufferbloat

3

Yes that’s where I based my tests.

1 Like
4

It works for me, but I’m using OpenWrt snapshots.

Software flow offloading can be enabled, but hardware flow offloading needs to be disabled.

5

Same in my case, im using snapshot and this is the result bellow with sqm + layer cake ctinfo:

1 Like
6

Thank you so much for the response. Will try it again later.

1 Like
7

I don’t know do I have SQM on my router Flint 2 but test is good

8

The settings you should be trying is

Download : 414000
Upload: 73600

Make sure that you have cake as Queueing discipline and piece of cake as the Queue setup.

I do have OpenWRT installed on mine using the following settings for my connection

config queue
	option qdisc 'cake'
	option enabled '1'
	option interface 'eth1'
	option qdisc_advanced '1'
	option squash_dscp '0'
	option ingress_ecn 'ECN'
	option egress_ecn 'ECN'
	option squash_ingress '0'
	option debug_logging '0'
	option linklayer 'ethernet'
	option overhead '34'
	option verbosity '0'
	option qdisc_really_really_advanced '1'
	option iqdisc_opts 'nat dual-dsthost ingress diffserv4'
	option eqdisc_opts 'nat dual-srchost ack-filter diffserv4'
	option download '45330'
	option upload '5080'
	option script 'layer_cake.qos'
	option linklayer_advanced '1'
	option tcMTU '2047'
	option tcTSIZE '128'
	option tcMPU '64'
	option linklayer_adaptation_mechanism 'default'

And its A+ for days on Waveform and speed.cloudflare.com Its Great Great and Good can’t be happier then that.

2 Likes
9

Thank you so much for this.

10

Just remember that my settings will not work perfect for you, there will still be some tweaking specially as i am using VDSL2 FTTC for my connection which uses PPPoE

11

Yes I know still thanks!

1 Like
12

Good day! May I know if this one is necessary?
qdisc_really_really_advanced

and may I know that does it do? The Openwrt documentation doesn’t provide any explanation.

13

I don’t think that’s needed.

1 Like
14

Good day! May I ask again if Full Cone NAT affects SQM? Thank you

15

I wouldn’t think so. However i never tested that.

1 Like
16

Thanks for sharing!

I was using a bit of a simpler config, but the one you shared performs slightly better

Cable internet: 1200/120

config queue
        option enabled '1'
        option interface 'eth1'
        option download '400000'
        option upload '90000'
        option debug_logging '0'
        option verbosity '0'
        option qdisc 'cake'
        option script 'piece_of_cake.qos'
        option qdisc_advanced '1'
        option squash_dscp '0'
        option squash_ingress '1'
        option ingress_ecn 'ECN'
        option egress_ecn 'NOECN'
        option qdisc_really_really_advanced '1'
        option iqdisc_opts 'nat dual-dsthost'
        option eqdisc_opts 'nat dual-srchost'
        option linklayer 'none'

Now using this (450/100):

config queue
        option qdisc 'cake'
        option enabled '1'
        option interface 'eth1'
        option qdisc_advanced '1'
        option squash_dscp '0'
        option ingress_ecn 'ECN'
        option egress_ecn 'ECN'
        option squash_ingress '0'
        option debug_logging '0'
        option linklayer 'ethernet'
        option overhead '22'
        option verbosity '0'
        option qdisc_really_really_advanced '1'
        option iqdisc_opts 'nat dual-dsthost ingress'
        option eqdisc_opts 'nat dual-srchost ack-filter'
        option download '450000'
        option upload '100000'
        option script 'layer_cake.qos'

If I increase download above 450, the latency increases drastically.
I was using an old WRT32X before, with release date back in 2017, and it performed equally. So in that sense I`m a bit dissapointed. I was expecting 700+ download with SQM on the Flint2 to be honest. In general I really like this router and other products from GL.iNet.

17

In the meantime I was able to tweak things a bit for my 1200/120 cable connection:

config queue
        option qdisc 'cake'
        option enabled '1'
        option interface 'eth1'
        option qdisc_advanced '1'
        option squash_dscp '0'
        option ingress_ecn 'ECN'
        option egress_ecn 'ECN'
        option squash_ingress '0'
        option debug_logging '0'
        option linklayer 'ethernet'
        option overhead '22'
        option verbosity '0'
        option qdisc_really_really_advanced '1'
        option iqdisc_opts 'nat dual-dsthost ingress diffserv4 no-ack-filter'
        option eqdisc_opts 'nat dual-srchost ack-filter diffserv4 rtt 100ms'
        option download '700000'
        option upload '100000'
        option script 'layer_cake.qos'

Love the result/performance now: https://www.waveform.com/tools/bufferbloat?test-id=43ca9c73-5adf-45d2-b656-83959aab8893

18

What is the result when the SQM is disabled?

I'm not using SQM and my latency is 13ms unloaded, +4ms (download) and +7ms (upload).
Using Flint 2 with Firmware 4.6.4

19

Afaik, WED adds latency but I dont know if this still applies at newer GL releases. (WED is enabled by default when using Hardware Acceleration)

20

Wow, that is pretty nice. For me without SQM the numbers are 22ms, +43ms, +26ms.
I`m using OpenWRT 22.05.4.

Connection via LAN, not WiFi