PPPOE poor throughput

Hi, having a few issues here with throughput with the PPPOE setup. And would appreciate a bit of help or advice with the troubleshooting.

Am using CCR1009

I have a 30m/5m package setup on Zima
When I connect to the network via PPPOE I can get around 20M down and 4M up, however if I connect to the router with a static IP address( and use the same simple queue I can get the 28-30Mb down and the 5Mb up.
I believe that it may be an MTU issue so screenshots below

I am using Mikrotik ==> Toughswitch ==> Ubiquiti Air Prism(AP) ==> PPPOE client(Ubiquiti CPE)

/interface bridge
add comment=“Ports 3,4,5,6,7” fast-forward=no name=Bridge-LAN
/interface ethernet
set [ find default-name=ether1 ] comment=WAN name=ether1-gateway speed=1Gbps
set [ find default-name=ether3 ] comment="POE Switch "
set [ find default-name=ether4 ] comment=LAN
set [ find default-name=ether5 ] comment="UPS "
set [ find default-name=ether7 ] comment=“POE Switch”



Hi @Killian

Long time mate, can you pm me with details, I am having issues with upload but I am suspecting Mixed mode setup issues of airprism.