@cmr Thanks for the reply. The intention is to essentially verify the port is not causing errors. So using a dumb switch is a good idea and should perform the same function. My preference would be to have a small, light rj45 plug. Easily transportable, effective results.   When you mention 'loopback protection', is that in reference to broadcast-storm loops? I can't seem to find any Meraki docs on loopback plugs. ... View more