I have had issues where the switch would freeze and I would have to power cycle because some ports were using different MTU's. I find it is best to keep all ports using the same MTU, then there is never an issue. I don't think SwOS can do MTU fragmentation. Unfortunately there is always some device that only uses 1492/1500 so it is hard to go above that without issues. What I would like to find out is how to use, lets say 9000 MTU, and have all the other devices like WiFi router, printer, etc. that cannot be changed to work on the same local network. Is there a way to run a separate unmanaged switch for these devices? Or is our only option separate vlan's on a layer 3 switch?