The best option for you es creating a "Configuration template" and then after creating networks with it`s own MX bind the template to the network. https://documentation.meraki.com/zGeneral_Administration/Templates_and_Config_Sync/Managing_Multiple_Networks_with_Configuration_Templates Just take in count the firmware upgrades bc in the future you only will be available to upgrade firmware ussing those templates. The best practice is to divide it into networks that physically are near from each other, just in case that the meraki device does not work fine after upgrading Regards.
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