I have two offices each with their own subnet. A perimeter firewall
at each location is the default gateway and also provides a
site-to-site VPN. I’m adding a private line between the offices with
a router at each end. I plan to use DHCP to update end nodes to the
new route path. And I will add the route to each of the nodes that
have static IPs (such as servers). But is there any other way I can
globally tell everything that the other subnet is now available
through the router instead of the default gateway?