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Solved
Orbi doesn't fall over to 2nd or 3rd DNS
I have a couple of Raspberry Pi's running PiHole for my DNS. The setup works great, but the other day the first PiHole machine got unplugged, and my devices weren't able to reach the network, despite...
So I think I figured things out.
One of my RPi is setup as my DHCP server, and when I looked the DNSMasq .conf file it was only passing on the IP address of the DNS servers for that RPi, not the addresses for the RPi PiHole severs.
I edited the .conf file, and replaced 8.8.8.8, etc with the local pihole IPs, and for the first time ever I have all three of my RPis showing blocked traffic!
Here is a look at my Pi setup. I have three now. (it's kind of an addiction.)
They are listed in order of how they appear in the DNS in my Orbi.
I recently added the RPi4, and made it the main DNS, demoting RPi3 to second.
Only my NAS, Orbi and the RPi4 are hitting the RPi3.
Nothing is using the ZeroPi.
I can't imagine that if all three were being hit every time, that the other two wouldn't show some queries or blocks.
So I think I figured things out.
One of my RPi is setup as my DHCP server, and when I looked the DNSMasq .conf file it was only passing on the IP address of the DNS servers for that RPi, not the addresses for the RPi PiHole severs.
I edited the .conf file, and replaced 8.8.8.8, etc with the local pihole IPs, and for the first time ever I have all three of my RPis showing blocked traffic!