@Akul You'd better post your inquiry on the below sub-forum, or you can search if there are similar feedback: https://community.tp-link.com/en/home/forum/77 Or you can check this article first to...

@michkrom You are correct. Just as the error message told you, the DNS server address on the Internet page cannot be in the same IP subnet as the router LAN, so you can only configure that DNS server...

@brentd You may monitor the connectivity when the 2.4G channel is fixed on 6 first. If there is still an issue, you can try to install the beta firmware on your Archer A6 as per its hardware, then...

@yong9199 We have reported the issue to the support engineers, they will likely reach out to you via email to continue to troubleshoot your issue.

@Big_Al How about resetting both the C80 and the WPA8631P-kit to factory defaults, reconfiguring them from scratch, will you be able to add them into the Onemesh system? If still failed, please...

@IvanCarlos That's great to know. So it seems the issue was caused by the previous ISP network, it may block the NTP server port 123.