@Xila Please check this guide to confirm all the settings on the AX1500 do match that provided by Unifi: https://www.tp-link.com/support/faq/1585/

@AnupamSamanta Hi, please follow this troubleshooting suggestions first to see if the disconnect issue can be resolved: [Troubleshooting] Router Disconnects from Internet BTW, who is your ISP? What...

@MikeyE Is this Archer C9 brand new? When you done all the troubleshooting you mentioned above, can it get a WAN IP address from the ISP modem? Please show us the Status of the Internet/WAN page of...

@S10077 Are you sure the 2.4G and 5G are still working when the wireless devices are connecting to the router network when there is a WAN error on the router? Please verify if they are connected to...

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

@petemate93 The Archer AX90 doesn't support Sky MER DHCP option 60/61, we only have the DSL modem routers can work with that, such as Archer VR2100.