Hi i have a Er7412-m2 connected with wan port directly to my ONT isp (2500/1000) my isp give ipoe and ppoe at same time.

No problem with other router, i must use vlan100 to connect.

with er7412-m2 i cannot connect with ppoe mode, sometimes it has received the public ip and gateway/dns but it drops connection after seconds and not start navigate.

with dhcp option in ipoe mode I have ip and i can reach 2200/300....enabling flow control I have between 500-800 mbps upload speed. With pfsense virtualized i  have 2200/1050 ... I have also tested with different setup on wan port reducing max upload ....and also on port feature of er7412 but i cannot solve. 
 

hardware i think is very fast but software not completely optimazed (new product). Can y help me ?

Er7412 is connected to sg3210x. I have this problem using 2.5 lan port and my Apple Mac Studio (tested Connect to lan port router or to switch) ... with pc or other devices with 1G port I have 950mbps upload