What is this Diagnosis connection error?

Help
1

I opened Pi-hole to find a message in Pi-hole diagnosis. Screen print below
I ran pihole -d. Screen print below.
Can someone tell me what this means and how to fix it?

Thanks!

Actual Behaviour:

[replace this text with what is actually happening]

See screen print

Debug Token:

[Replace this text with the debug token provided from running pihole -d (or running the debug script through the web interface]

See screen print

pihole diagnosis 2_21_2025
pihole diagnosis 2_21_20251248×511 93.5 KB

pihole debug log 2_21_2025

2

Your debug log shows your network has only link-local IPv6 connectivity, so it can't connect to public IPv6 addresses.

However, you've configured your Pi-hole to use IPv6 upstreams:

   [dns]
     upstreams = [
       "1.1.1.1",
       "1.0.0.1",
       "2606:4700:4700::1111",
       "2606:4700:4700::1001"
     ] ### CHANGED, default = []

When Pi-hole regularly rounds up its upstreams to elect the fastest responding one, it can't connect to those IPv6s.

Those failures have happened in Pi-hole v5 as well, but v6 now logs them.

To avoid, just untick Cloudflare's IPv6 entries from your Upstream DNS servers at Settings | DNS.

3

I did not configure v6. I simply did an update from v5 and it apparently carried over the settings. I never had this or any error with v5 in all the years I have used Pi-hole. Anyway, that was an instant fix. Thank you so much!