Soldato
So I'm going to follow up on this. Since my series of posts on my unifi network, nothing had really helped. I had shifted the default DNS settings in windows 11 to try and reduce the caching of DNS queries etc. but I was still dealing with issues and it was apparently more prevailent with outages on our phones starting to occur. I did some reading and found other issues with the U6-LR and figured that a few days ago that it had hit a problem that could only be resolved bby replacing it... so I did! Bought a U6 Enterprise, plugged it in on tuesday to replace the U6-LR (same size drop in) and voila everything started working without issue. Internet issues resolved themselves, DNS issues disappeared and everything just was working as expected.There are never a stupid questions when it comes to non-IT professionals playing in a more advanced IT space I'm a Civil Engineer so this is a 'hobby' of sorts!
The UDM Pro is acting as my router, i.e. its communicating with the fibre ONT and allows me to connect via DHCP to the network. The Server Essentials 'server' is acting as the domain controller including network wide DNS and DHCP. Everything on the wired network is fine and I never had issues with the older nano APs but this U6-LR has caused me nothing but trouble and it replaced the nano in the house... I've run an active directory setup since ~2012 after Server Essentials 2012 was released and I've never had this trouble until the U6-LR was installed last year.
The gen 2 switch is not layer 3, its not the pro version but the dumb version so no routing on board. Yes I could set a windows server or linux to act as my router but the UDM Pro offers a form factor and effectiveness that works for me and linked with the rest of the network and allowed me to depreciate my controller in docker which always caused me trouble.
So its early days but I think there is a serious issue with the U6-LR which the gen 6 APs have solved.