Contacting to technical support at Meraki dashboard. ... View more

Only on the WAN ports need configuring, and only if they don’t use DHCP (which is the default). You’ll need to power up the new MX, connect to the local admin page on the MX and set the WAN ports to match the existing MX - I.e. the static IP address or username and password if it uses PPPoE. The WAN port needs configuring so that the new MX can ‘talk’ to the Meraki cloud when you replace the existing device and pull the config from the cloud. ... View more

What happens if you reboot the 4G internet device instead of the Meraki MX? If the internet comes back online by doing that then it is the device in front of the MX that is likely a problem. I have seen this before with buggy home hubs in front of the MX.   Your question and description is not particularly clear so its not that easy to help you  ... View more

Done .thanks ... View more