Hi ,   At the moment you can only use https://developer.cisco.com/meraki/api-v1/get-device-live-tools-mac-table/ on switches. So I don't think there is any way to get the equivalent data on a MX.   Edit: My reply is only for the API. As noted by cmr , you can view some of the info via the dashboard ( Topology ) or liveTools (ARP table)   ... View more

Seeing the same at one of our sites.   We have two Meraki MR52s there and admittedly we don't spend a lot of time tuning them. The spoof alerts started last week. I have basically disabled one of the APs and greatly reduced power for the other. Users are happy with the settings, and I'm seeing way less interference on the remaining AP.   The spoof alert only shows up if I try to re-enable the other AP. Any band and any power level and the deauth packets start going out again. I'm going to power off the AP from the switch today and monitor through the rest of the week. ... View more