Thank you for your post. Is your GPON SFP module plugged directly into the ER8411?The ER8411’s 10 G SFP+ WAN port only supports negotiation at 10 G, so the link will not come up. I am aware that the...

Hello, I came across this thread recently: https://community.tp-link.com/en/business/forum/topic/602524?sortDir=ASC&page=2 My ISP also provides a GPON SFP module that links at 2.5G but not at 10G....