I'm using Gargoyle on my home router for few years now, primarily for even distribution of limited internet traffic through month by means of easy tuneable quotas in Gargoyle firmware(Thank you for that!
![Smile :-)](./images/smilies/icon_e_smile.gif)
My access is provided via ISP's 3G modem on separate router. It has always been problem with persistent connection via this cheap modem, few times a week it's been bricked without apparent reason and needed router reboot or even manual power off. Due COVID-19 stuff I'd plenty of time for visiting relatives in place were 3G connection speed is almost half of usual numbers and suprisingly that el cheapo modem worked quite reliable in same setup with two routers and almost same usage scenario. So I thought that this pal could be choking with extensive bandwidth or something similar.
I've enabled Upload and Download QoS in Gargoyle with 75% of available bandwidth measured via Speedtest CLI by Ookla. QoS rules were set per first post in this topic /phpbb/viewtopic.php?f=12&t=11167 , except that ACC is off. And right after enabling QoS I've noticed that quotas usage gone crazy. If for example I'm downloading 10 megabytes pdf document it's size accouted as 20+ megabytes, If I'm starting torrent client it's accouted traffic could be anything between from 2 to 10 times more than real one displayed in client and ISP's statistic. Also on "Connection list" page numbers for individual connections are off by same amount. But "link load" for class on "QoS Download" page is on contrary is 2-3 times larger that speed displayed in torrent client, in Ookla's Speedtest CLI or in file downloading utility. Upload speed showed by Speedtest CLI was almost spot on to preset value.
If I turn off QoS in Gargoyle everything goes back to normal. Memory usage by router is always about 50%. For a moment I was thinking that QoS is counting internal LAN traffic between different devices but speed between them was OK to me.
I'm really sorry for so long description but I've no idea what is important in this situation and what else I could check
![Sad :-(](./images/smilies/icon_e_sad.gif)
Gargoyle is working on TP-Link TL-MR3420 v2, version is latest available for those routers 1.10.0