@idavid Archer C5v4 is aimed at Service Providers, thus its FW most probably has been customized by your ISP (given the device was provided by your ISP). Try hard reset (Method 1) the router and...

@wang68 You can't use two routers to build a OneMesh - Q10/A10.

@etype To recap, the problem is with any LAN port which the QNAP is connected to, right ? Other devices connected to the LAN ports don't have this problem ? Have you tried to use the other QNAP LAN...

@Gabriel13 Judging by this behavior, I would suggest that the WDS hasn't been built successfully - hence you're not receiving an IP address via TD-W8961N's Wi-Fi. " ... you can go to Advanced >...

@Hypnoticfart The equipment that AT&T provides to its customers is described here: https://www.att.com/support/article/u-verse-high-speed-internet/KM1011652/ I don't think you can bypass AT&T Wi-Fi...

@e_dell Yes, a device like this one - https://www.aliexpress.com/item/4000848568974.html could give you a definitive answer to what's the current value in real time.