I found the reason for getting one MAC-Address only - I switched the network from "Cloud Track" to "MAC address" and now I see the 2 addresses who cause the conflict. Solving the IP conflict message is up to the vendor of the acting devices (or meraki to mark some messages as expected without sending an E-Mail out). To stop the flood we disabled the IP conflict alert again.   ... View more

Hi SoCalRacer,   thank you for your quick reply. Sorry for not making it clearer. The devices using the VRRP address are non Meraki devices in the network. Usually you get 2 MAC-Addresses within this alert, but in that case it is only one.     ... View more