Hello Mauro,Replacing your MX85 with MX84 will not affect your configuration. However, please keep in mind that the maximum runnable firmware version for MX84 is MX18.107.10. So, any new features available from the MX18.211+ version will not be avail...

Are you observing any packet loss on the WAN interface of the Z3 device at the time of the issue?

Hello @james.timme1 ,Please be informed that this issue occurs when the MR device is not able to receive an ARP response from the configured gateway IP address. In order to maintain the dashboard connectivity the MR would have failed back to the DHCP...

Hello @sadorais ,I would suggest going through the MX datasheet to identify which model will suit your setup based on your requirements as well as the budget.https://meraki.cisco.com/product-collateral/mx-family-datasheet/?file

Currently, there is no way to identify which ISP is plugged into the WAN ports of the MX appliance. As mentioned by @CMR, you can grab the pubic IPs from the Appliance status page --> Uplink tab and get the necessary information by navigating to http...