Just so I'm asking correctly, We are basically wanting to configure the environment like the second example in this Meraki document    https://documentation.meraki.com/MX/Networks_and_Routing/Passthrough_Mode_on_the_MX_Security_Appliance_and_Z-series_Teleworker_Gateway   Except, instead of going out to the Internet, we will be going into our Vendor's router and have a second MX as a spare. I assume one of Internet ports on the MX will be used for the Vendor router and the other will go into our LAN, which will have access to the Internet. ... View more