[BUG] RAX200 always chooses a random access between the domain name servers

The RAX200 is a new device I just bought less than a week ago to replace my old Netgear device.

After the RAX200 was unpacked, I set up the network configuration through the setup wizard, including PPPoE dial-up, LAN static IP address, DNS server, etc., and upgraded to the latest firmware (released last September). Wireless and wired connections, as well as Internet access, are all working fine.

In my config, the primary DNS address points to the Raspberry Pi 4 (based on Bind9) that already has a LAN static IP. The secondary DNS address is set to 8.8.8.8.

After a week of use, I found that the RAX200 randomly selects the primary DNS and secondary DNS to resolve domain names, which often causes my intranet domain names to fail to resolve normally.

In order to find the problem, I set the primary DNS and secondary DNS to different LAN IPs with Bind9 turned on in the intranet, use commands to resolve the domain name through RAX200, and monitor the log output.

Eventually I found out that both the primary and secondary DNS were being accessed, seemingly randomly. Not sure why the RAX200 doesn't prefer primary DNS (maybe there is load balancing for DNS internally?), but it's a real problem.

I didn't have this problem with my old Netgear devices, so I hope the firmware developers of the RAX200 can check it out.

Thx.