Just a follow up to the issues experienced with rebranded Accton switches having issues on Mitel. I'm not in a position to change out a couple of these for other brands, so I've gradually been trying different things to see if I can stop the problem. So far, it seems that disabling LLDP stops the weirdness. I have one that has nearly 6 months of uptime without experiencing the issues (would have been longer but they upgraded UPSs). They used to become unresponsive within weeks.