guys im new on openwrt and im optimizing my internet for gaming i have fiber internet with pppoe and vlan that i need to set them and my router flint 2 router and my speed is 500 download and 200 upload what overhead and mpu in sqm i should use ?
i have seen the the openwrt sqm wiki but they didnt mention the fiber with pppoe and vlan
when i use 44 overhead and 84 mpu i need to lower my download to 100 from 500 to get around 3 download bufferbload but my upload i lower it to 190 and i get 0 upload bufferbloat
and for mtu what i put in for eth1 and (eth1.10 this one for my vlan) and pppoe-wan interfaces
26 bytes total then add 4 bytes for VLAN tag then it is 30 bytes. Or if double tagged 34 bytes.
However, I have read that 44 bytes is a conservative value and it is what it is selected by OpenWRT via Luci when you select Ethernet + overhead in the link layer adaptation tab.
So if you have 44 bytes that is acceptable. But maybe try with 30 bytes and compare.
For the pppoe interface set MTU to 1492 unless your ISP uses 1500. Rest leave as 1500.
MPU: 64 (start with 64; if you see issues with small-packet latency, try 84 as you have).
You select the pppoe-wan interface for the SQM device.
Also I assume you did this but
SQM link rates
Set download to ~95% of measured (500 Mbps -> 475 Mbps).
Set upload to ~95% of measured (200 Mbps -> 190 Mbps).