WAN and LAn Configured in to same network

net work connectivity as in the picture
after connecting the 450G router the total local network is distrubing
please help me

new custmers who need to connectto 450g is good

existing custmers cannot connect to rb1100 unable to ping also

both 450g and rb1100 are connectes to two diffrents radius servers
rb1100 for wireline customers
and 450 g for Wi-Fi (Wire less costmers)
net work diagram.png