@KingMarc Hi, Do you still use the original power adapter? Was there any power cut or bad weather when you upgrade the firmware? Are you able to access its web UI from a browser? What is the hardware...

@Super.Spartan Hello, If you want to open the specific ports on the C5400X, please refer to the below instructions to add the Virtual Server rules: https://www.tp-link.com/support/faq/1541/ May it...

@Domer Hi, Have you tried to reset the C20 to its factory defaults and add the Address Reservation again? If still the same, we may escalate your case to the engineers to investigate, thanks.

@shaheerahm May I know how many devices are connected to this Archer C6 and the high ping issue happens when you play games or watch videos online or just browsing the websites? What if you connect...

@archerowner Hi, I'm so sorry for the typo, I should mean band 4. Sorry about that.

@mac13 Hi, our engineer has contacted you via email, please respond directly and he will help you. Good day.