This is only happening at one of the sites we manage. Every month and a half or several, I'll look the site up in Central and see red. The 2930F switches have disconnected. All I need to do to fix the issue is open a direct CLI to them locally, 'disable/enable' Aruba Central, and they're back on-line. I'm just wondering why it keeps happening and figured someone here might have an idea, before I contacted TAC. These are the only devices at the site registered to Central. I just added an AP, but didn't bother registering it.
Looking at it with an Account Tech Rep, I thought I'd found something interesting. 'Error 5222 - TLS Connection Error'. I couldn't find anything flagged on our firewall or other perimeter control systems, so it shouldn't be on our end. Not much reference to that error anywhere online, either. The odd thing, though, is that now that the switches are reconnected to Central, that error persists in the log every 5 minutes or so. So is it a direct cause? I don't know.
I welcome your thoughts!