Maybe you need contact support@tp-link.com

Maybe you can try to disable NAT boost function. bakahk wrote Model : AD7200 Hardware Version : v2 Firmware Version : 2.0.1 Build 20170103 rel.71053(4555) ISP : Poland, MultiMedia (also for test - my...

Is there any screenshot about your issue? I think that will be helpful

Maybe you can contact tplink support via mail for the detailed information about C5400 whether support jumbo frame.

Is there any one contact tp-link technical support for further troubleshooting? I think they are willing to help us out.

As I know, C20_v4/C50_V3 have access control. But it seems that C60_V2 only have parental controls, but it has QoS function. " I would like the devices connected to the network to be able to talk to...