Sounds to me like Data-Carrier-Detect might be enabled? If the client disconnects before roaming to other APs, it’s not technically seamless-roaming. Besides that, I’m sure you’ve already checked the primary details: https://community.cisco.com/t5/security-documents/how-to-integrate-meraki-networks-with-ise/ta-p/3618650 - are Both APs are on the same network and tags (ie same SSID) - splash authentication depends on whether splash is hosted on Meraki cloud or on ISE; if Meraki cloud, use “Sign on” with My Radius. if using ISE with MAB authentication, then splash must be configured as ISE (vs my RADIUS)
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