@GRL Ok the reason I asked about VPN is from previous experience. I have a lot of VPN on TP-Link and have VPN to many TP-Link sites and Site with Cisco firewalls, both with S2S, L2TP and OpenVPN,...

@Bluebeep Do you have Site to site VPN or L2TP/PPTP configured on your router?

@dononeil I think beam forming is enabled by deafult on supported device.

@dononeil This is the only way, configure on SSID

@dmackenzie @DeltaCharlie nice to hear that there is a solution, but nice if you can share the solution :-)

@stealth23 Ok, there have to be something wrong with the router, I would return this router and ask for a new one., it should easily manage 350Mbps, I have several ER605v1 on 350 and 500Mbps lines...