Hi, my package upgraded to Unifi Biz 2Gbps and obtain this Dlink,
currently set it to bridge mode and use TP-Link ER707-M2 as router.
I had experience random speed drop to 100-300mbps with this Dlink
so i revert back to old ZTE Onu and limited to 1Gbps but no speed drop issue

After I flash the provided firmware, so far no speed drop for 20 hours
Will check it from time to time

PS: i dont have proper 2.5Gbe equipment to test max speed but can get around 1.4Gbps thru Wi-Fi 7 + iPhone