_:n27c3744755774b8b9dc0e4c2aa7ecfd4xb2
<http://schema.org/text>
"Where is the switch exactly?  Connected between the ISP router and your firewalls?  As long as each firewall has different WAN-side IP addresses (and your ISP has given you more than one IP), the two firewalls will each be unique from the WAN side, and  NAT to their internal address range and handle DHCP independently.  You can't connect them on the LAN side, and of course, if you have two devices on the opposing LANs each in the same 192.168 /24 range, they won't be able to talk to each other."
<https://community.spiceworks.com/topic/2270713-same-ip-range-for-2-networks-connected-to-the-same-router>