Thank you Bruce, yes, computers, mobile devices, etc. We are all Meraki (love it). For example computer ws-galaxy is located in my building, connected to a switch here, but reports connected to the switch across the street. If I'm understanding this correctly you're saying that because this computer controls the security in the building and talks to the security control panel across the street this is why it's mac address appears on the switch? It[s not necessarily the switch the device is physically plugged in to.