You need a bridge between network A and B.
Yes .. possible... but more complicated setup..
He actually just need to put both "routers" (which are
operating as switches only) into the same subnet.
ASSIGN AS THE MAIN "GATEWAY" : 192.168.1.1
ASSIGN your first "router" (switch) the IP: 192.168.1.10
CLIENT: ABOVE 192.168.1.100 via Dynamic IP starting 100~200
ASSIGN your second "router" (switch) the IP: 192.168.1.20
CLIENT: ABOVE 192.168.1.100 via Dynamic IP starting 100~200
SINGLE DNS SERVER on the gateway 192.168.1.1 (IMPERATIVE just one DNS)
this works fine. Done that with several devices... actually
more than 10 switches with dozen clients each..
Your devices need to allow their IP config.
SMART TRICK: YOUR GATEWAY DNS allows you
to define the "Dynamic range" - define as 100~200.
Use the MAC addr of each router to impose the IP
this way WRT54GL-ETH XX:XX:XX:XX:XX:XX 192.168.0.10
on the MAC association table.
the MAC of your device is printed on the case
use the right numbers instead of those XXX above
This way your device will receive the assigned **STATIC** IP
while CLIENTS will receive dynamic IPs
Paul
PS: BTW..
DISABLE DNS in all devices
EXCEPT 192.168.1.1