How do I connect two subnet in a single router?

Update report:
@rextended
Seems like removing

/ip route
add check-gateway=ping distance=1 gateway=104.16.248.249 routing-mark=to_ISP1
add check-gateway=ping distance=1 gateway=pppoe-out1 routing-mark=to_ISP1
add check-gateway=ping distance=2 gateway=104.16.249.249 routing-mark=to_ISP1
add distance=1 dst-address=104.16.248.249/32 gateway=pppoe-out1 scope=10
add distance=1 dst-address=104.16.249.249/32 gateway=pppoe-out1 scope=10

bring backs dns,error: DoH server connection error: Network unreachable
reference: http://forum.mikrotik.com/t/doh-server-connect-error-network-is-unreachable/141603/10

@anav
found out

/interface detect-internet
set detect-interface-list=none

This portion is linked with “tik app”. Setting none removes the internet graph from the “tik app”. Enabling it on the app changes to “detect-interface-list=all”. :smiley: