a week ago
My main router is configured to be on the 172.16.16.1/24 connection.
I connected another ER-X to connect to the main router. Used the Wizard to configure load balancing. with the following settings.
ETH0 - WAN DHCP
ETH1 - WAN PPOEE as failover (currently nothing connected)
ETH2-4 - Switch0 with DHCP service offering 172.16.31.0/16
What I found is that my devices connected to my main router are getting DHCP services from the second ER-X in the DHCP scope.