If a Meraki Access Point does not have a configuration from the Meraki Cloud Controller it will instead broadcast a default SSID of "Meraki-Scanning." The AP takes an address of 10.128.128.128, the SSID runs DHCP, and it will try to assign any clients that associate with it an address. This is merely to provide a connection between a client and the AP to allow for local configuration.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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