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My troubleshooting usually involves:
Have you tried with different cables? Are both APs adopted by the USG? Can you SSH to the APs? Is everything as up-to-date as it can be? Is there any vlan / trunking fuckery happening? What version AP are they - 6 needs 24v, tough switches only provide 12v. Are the tough switches configure for POE?
NotThamesWater-
Most of the Ubiquiti stuff that matches the criteria is out of stock so second hand prices are sky high at the moment (more than RRP on a few bits I saw).
I've tried various different cables (and a couple of different tough switches). Both APs are adopted, fully up to date and show as fine in the controller. I haven't tried SSHing to them but see no reason why it wouldn't work. Not sure how you find the version but they are reasonably old, at least 5 or 6 years and probably more (although I'm pretty sure the tough switches provide 24V).
Shouldn't be any VLAN shit going on and can't see anything in settings. Tough switches are configured for PoE with the LED showing. I've tried various different ports (and the port works if it is the first AP to be plugged in).
A new power supply was in my thinking but a decent one is half of the price of a replacement switch with no guarantee of working.
aggi
Any like to hazard a guess as to what is going on with my network?
Set up is as below:
Power to both APs was provided by PoE by the Tough switch.
I recently unplugged the Unifi AP-Lite and when I plugged it back in again it didn't work. Didn't light up at all.
A bit of experimenting found that whichever AP I first plugged into the Tough switch would work fine. The second wouldn't work (sometimes it would light up as if powered but the Tough switch wouldn't see anything plugged in and the AP showed as offline).
My guess was maybe it was a power supply issue so I left PoE enabled on one port to power one AP and used a PoE injector to power the other. Both APs now work but the one with the injector only connects at 100Mbps rather than 1000.
Any bright ideas on what is going on here before I just sod it and buy a new PoE switch?