@iansari You have the latest update to this device. Firmware download is on this location. https://www.tp-link.com/no/support/download/er7212pc/#Firmware

@yorkman

@yorkman this is new not long ago, the devices to be upgraded must have access to this port on the controller, so you need to check that you can reach the controller from the network the devices are...

@Mr.Blue that was very strange, that device should easily handle 300Mbps, this seems to be a case for tp-link support it seems like there is something that slowed down the speed somewhere.

@Mr.Blue What speed have you on LAN interface?

@Mr.Blue it sounds like you have 100Mbps link on your lan or wan. check the network cable and the speed at which the network port is connected