NONAT has to be turned on first in Organization > Early Access. Docs are here: https://documentation.meraki.com/MX/Networks_and_Routing/NAT_Exceptions-No_NAT_on_MX_Security_Appliances And I was wrong, BGP route exchange is available on NONAT routed mode - but only on firmware 18.207 or above: https://documentation.meraki.com/MX/Networks_and_Routing/Border_Gateway_Protocol_(BGP)
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