@crashsuit Thank you so much for getting back with this detailed info. Except for the DNS server settings, you may also try to open the related UDP 4950 and 4955 ports on the C1200 manually and see...

@pritish11 Is there any change in your network when this issue starts to happen? Is the WR845N powered via the wall socket? Ensure there is no surge protectors. When they got disconnected, is the...

@Woody Hello, thanks for getting back. Do you use the previous A6 with Unifi as well and use the same configuration? Is others also using Unifi on the AX20?

@TKSX Hello, thanks for asking. The address reservation max limit for the Archer C4000 is 32, and it is 64 for the AX series.

@vsparihar Hello, thanks for reporting the issue to the community, can I have more details then our engineers can try to investigate further? 1. Is the wired connection of this A20 is unstable or...

@tollymcc Thank you so much for the valued sharing, it's glad to find out the issue was caused by the old Surge Protectors, this will help a lot of others who may encounter this kind of disconnect...