You should use the name as in your Meraki environment. The piggiback data don’t come as ip address anymore as not all devices have a lan ip.
In my environment I have created a Host MerakiCloud and attched the Cisco Meraki special agent to this host. With this you sould be able to discover the Cisco Meraki Licenses services of your Meraki Organisation. In the background the agent will discover your devices as pigiback data. For these data I have a created a Dynamic host management rule.
