I work as tech support in a small town.    I have a business that has a Meraki managed router in place for their Point of Sale - Toast Network. They need to have a seperate network for the cameras, televisions, staff network. These devices cannot be connected to the Meraki - Toast network.   The network map is  Coax from ISP -> Modem -> simple switch -> ERX Router and Meraki Router.    When either one is connected, everything works properly, when both are connected both go offline.    I have confirmed with my ISP that we have no limit to multiple public IP addresses, but something is causing the routers to conflict with each other. We are currently considering a managed switch to eliminate crosstalk between the routers on their way out to the internet.   Any thoughts/support would be appreciated. ... View more