lose 3/4 of my provided speed when connect after router
Hello. Im in need of advanced help as i lose alot of speed when i connect my provided cable in to router and then connect anything from router. If i test speed from cable thats provider installed in to flat - i get up/down of 850ish Mbps. Wifi is max 200Mbps even tho i test if like 1m from router and cable speeds drop to 250Mbps.... So question is what settings if any prevents from getting trough all my provider speed? Is this unit broken and i should get it back?
As i understand(if not mistaken) i should have all 4 gigabit lan ports(so i should be getting same speed i receive from main internet cable.....same with wifi, this router should be giving out maximum possible speeds at 1m from router?!
Thank you in advance!