Sorry for the offtop, but since Meraki totally fails communicating this issue I just want to let you know, that if you are using the "A client is detected sharing its IP address via NAT" alert, please be careful with that, it can cause performance issues on switches (some traffic gets dropped). They were supposed to remove that option, but after few weeks, no luck (I'm not surprised to be honest, but disappointed), more to read about this in this topic: https://community.meraki.com/t5/Switching/CAUTION-ALERT-if-A-client-is-detected-sharing-its-IP-address-via/m-p/151479
... View more