@Mikeylad I'm not following why you want to clone a network at all. Do you have a specific reason why you want to clone? I don't agree with your statement that the cloning method is the best way. How did you arrive at that conclusion? That said, perhaps an explanation of combined networks will help clear this up? Combined networks are actually just a little bit of sleight of hand on Meraki's part. A combined network is actually just a container that has the actual device type specific networks inside. So if you have a combined network with MX, MR, and MS, you really still have three networks that are being shown to you as a single. This is why you can split them and combine them any time you want. If you clone your combined network, and add a new MX to that network, your original network is still there and functioning as it always would. If you move devices between networks then yes, there is a brief period of time where technically the devices do not have a config. There's a "move to new network" action you can do, and in that case the time the device doesn't have a config is essentially nil, however if you have any device specific configs (radio settings on the AP's for example) then you need to set those again in the new network as they do not clone over. None of this is the simplest way though. I would suggest you take another look at the KB I linked to, and check out Method 1 again (Quick Swap). If all you need to do is replace the MX then simply removing the old one followed by adding the new one to the existing network is far and away the simplest method.
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