Diogeles wrote here the error persists even after the beta update a penalty. Hey, what is the error message? What about the current speed you can get from the C5400x? Is it better?

Hi bro, do you mean that the internet IP address will change randomly, while it should be static to ensure the performance of OpenVPN? If so, you can use DDNS, and bind the IP address to a domain...

Lol, there is a same topic, you can refer to it mentioned above.

Hi, you may need contact the tech support to check the warranty. https://www.tp-link.com/en/support/contact-technical-support/#Hotline-Support

Good job~~~lol

There are some TP-Link unmanaged switch. https://www.tp-link.com/en/business-networking/unmanaged-switch/ And as a reputable manufacturer, they provide warranty service as well....