@eltikpad, thank you for your assistance. I was able to resolve the issue myself in the meantime.
The names did show up in the static entries and were resolved locally.
I could pinpoint the issue to one particular client only, all the others were working OK with the config. This client had erroneously a static DNS entry (8.8.8.
defined instead of just getting it via DHCP. Why wasn't this an issue before? Because I had a rule in the router for the external PiHole DNS server to route all DNS traffic regardless of the target IP address over the router, which made the local resolution work. The moment this was switched off, the requests went out to the external DNS server without a chance to resolve the local clients.
After removal of the static DNS server entry, everything worked as it should.
So, not an issue with the router at all. I leave this here in case it helps someone else.
The names did show up in the static entries and were resolved locally.
I could pinpoint the issue to one particular client only, all the others were working OK with the config. This client had erroneously a static DNS entry (8.8.8.

After removal of the static DNS server entry, everything worked as it should.
So, not an issue with the router at all. I leave this here in case it helps someone else.
Statistics: Posted by emk2203 — Sun Apr 06, 2025 11:10 pm