We have an issue at our main building. 4 floors, and each of them have an UBNT switch handling all workstations for the floor. All share a single subnet. We have an issue where one wants to lock up for seemingly no reason. Yesterday the UBNT switch handling workstations on floor 2 locked up. We rebooted it and everything came back up. Today we replaced it with a spare. We then did a firmware update on the switch on floor 1. When we did, floor 2 (with the new switch) locked up again. We were able to reset it this time by just disabling and re-enabling the port from our main L3 to it. These switches on floor 1 and 2 aren't connected together. All UBNT floor wide closet switches (each with 20ish workstations attached) have runs to our main server room's L3 switch. No wireless in the building. I'm thinking it almost has to be some kind of loop causing a broadcast storm. We set up monitoring on all ports on all switches to see if it happens again. In the meantime does anyone have any thoughts as to what else might be causing it? And why would the floor 1 switch firmware upgrade cause the floor 2 switch to lock up until we disabled and re-enabled it's link to the rest of the network? My limited networking experience has me thinking we have a loop somewhere. Any thoughts or insight welcome.
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